/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/brs2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:02:53,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:02:53,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:02:53,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:02:53,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:02:53,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:02:53,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:02:53,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:02:53,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:02:53,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:02:53,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:02:53,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:02:53,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:02:53,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:02:53,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:02:53,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:02:53,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:02:53,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:02:53,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:02:53,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:02:53,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:02:53,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:02:53,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:02:53,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:02:53,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:02:53,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:02:53,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:02:53,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:02:53,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:02:53,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:02:53,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:02:53,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:02:53,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:02:53,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:02:53,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:02:53,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:02:53,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:02:53,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:02:53,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:02:53,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:02:53,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:02:53,951 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 05:02:53,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:02:53,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:02:53,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:02:53,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:02:53,991 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:02:53,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:02:53,992 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:02:53,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:02:53,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:02:53,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:02:53,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:02:53,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:02:53,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:02:53,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:02:53,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:02:53,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:02:53,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:02:53,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:02:53,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:02:53,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:02:53,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:02:53,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:02:53,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:02:53,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:02:53,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:02:53,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:02:53,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:02:53,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:02:53,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:02:53,998 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 05:02:54,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:02:54,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:02:54,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:02:54,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:02:54,298 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:02:54,299 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2.c [2020-10-13 05:02:54,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8ed07246/74165c4456c340749f40c724709f3e5f/FLAG57ef902bd [2020-10-13 05:02:54,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:02:54,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2.c [2020-10-13 05:02:54,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8ed07246/74165c4456c340749f40c724709f3e5f/FLAG57ef902bd [2020-10-13 05:02:55,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8ed07246/74165c4456c340749f40c724709f3e5f [2020-10-13 05:02:55,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:02:55,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:02:55,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:55,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:02:55,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:02:55,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55, skipping insertion in model container [2020-10-13 05:02:55,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:02:55,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:02:55,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:55,552 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:02:55,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:55,682 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:02:55,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55 WrapperNode [2020-10-13 05:02:55,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:55,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:02:55,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:02:55,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:02:55,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (1/1) ... [2020-10-13 05:02:55,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:02:55,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:02:55,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:02:55,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:02:55,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (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 05:02:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:02:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:02:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:02:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:02:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:02:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:02:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:02:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:02:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:02:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:02:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:02:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:02:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:02:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:02:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:02:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:02:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:02:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:02:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:02:56,147 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:02:56,148 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:02:56,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:56 BoogieIcfgContainer [2020-10-13 05:02:56,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:02:56,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:02:56,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:02:56,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:02:56,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:02:55" (1/3) ... [2020-10-13 05:02:56,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68db3b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:56, skipping insertion in model container [2020-10-13 05:02:56,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:55" (2/3) ... [2020-10-13 05:02:56,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68db3b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:56, skipping insertion in model container [2020-10-13 05:02:56,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:56" (3/3) ... [2020-10-13 05:02:56,161 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2.c [2020-10-13 05:02:56,172 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:02:56,179 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:02:56,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:02:56,217 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:02:56,217 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:02:56,217 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:02:56,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:02:56,218 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:02:56,218 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:02:56,218 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:02:56,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:02:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 05:02:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:56,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:56,244 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] [2020-10-13 05:02:56,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-13 05:02:56,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:56,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411529517] [2020-10-13 05:02:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:56,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:56,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-13 05:02:56,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:02:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:56,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 05:02:56,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:56,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:56,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:56,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:02:56,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:56,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:56,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:56,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:02:56,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:56,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:56,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:02:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:02:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:56,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:56,884 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 05:02:56,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411529517] [2020-10-13 05:02:56,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:56,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:02:56,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058818836] [2020-10-13 05:02:56,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:02:56,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:56,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:02:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:56,913 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 05:02:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:57,045 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-10-13 05:02:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:02:57,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 05:02:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:57,056 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:02:57,056 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 05:02:57,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 05:02:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 05:02:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 05:02:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:02:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-13 05:02:57,100 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-10-13 05:02:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:57,101 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-13 05:02:57,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:02:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-13 05:02:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:57,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:57,103 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] [2020-10-13 05:02:57,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:02:57,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-10-13 05:02:57,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:57,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089302042] [2020-10-13 05:02:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:57,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:57,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-13 05:02:57,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:02:57,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:57,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:57,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:57,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:57,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:57,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:02:57,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,407 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 05:02:57,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089302042] [2020-10-13 05:02:57,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:57,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:02:57,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485808519] [2020-10-13 05:02:57,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:57,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:57,412 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-13 05:02:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:57,540 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-13 05:02:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:02:57,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:02:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:57,542 INFO L225 Difference]: With dead ends: 38 [2020-10-13 05:02:57,542 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:02:57,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:02:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 05:02:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:02:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 05:02:57,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-13 05:02:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:57,552 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 05:02:57,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 05:02:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:57,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:57,554 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] [2020-10-13 05:02:57,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:02:57,554 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-13 05:02:57,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:57,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264766186] [2020-10-13 05:02:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:58,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-13 05:02:58,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:02:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:58,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:58,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:58,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:58,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:58,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:58,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:58,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:58,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:58,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:58,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264766186] [2020-10-13 05:02:58,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:58,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 05:02:58,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339250875] [2020-10-13 05:02:58,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:58,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:58,223 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-13 05:02:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:58,447 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-13 05:02:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:58,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 05:02:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:58,449 INFO L225 Difference]: With dead ends: 37 [2020-10-13 05:02:58,449 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:02:58,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:02:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-13 05:02:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:02:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-13 05:02:58,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-13 05:02:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:58,457 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-13 05:02:58,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-13 05:02:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:58,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:58,459 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] [2020-10-13 05:02:58,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:02:58,459 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-13 05:02:58,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:58,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577466847] [2020-10-13 05:02:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:58,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-13 05:02:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:02:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:58,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:02:58,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:58,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:58,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:58,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:02:58,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:58,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:58,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:59,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577466847] [2020-10-13 05:02:59,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132858439] [2020-10-13 05:02:59,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:59,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:59,008 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2020-10-13 05:02:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:59,108 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 05:02:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:59,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 05:02:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:59,110 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:02:59,110 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 05:02:59,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 05:02:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 05:02:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:02:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 05:02:59,126 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-10-13 05:02:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:59,127 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 05:02:59,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 05:02:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:02:59,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:59,129 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] [2020-10-13 05:02:59,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:02:59,130 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-10-13 05:02:59,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:59,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169388491] [2020-10-13 05:02:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:59,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:03:01,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:03:01,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2245 [2020-10-13 05:03:01,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:03:01,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:01,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:03:01,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:01,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:03:01,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:01,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:01,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:01,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:01,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:01,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:01,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:01,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:01,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:01,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169388491] [2020-10-13 05:03:01,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:01,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:03:01,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598154052] [2020-10-13 05:03:01,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:03:01,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:03:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:03:01,497 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-10-13 05:03:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:01,726 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-13 05:03:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:03:01,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 05:03:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:01,728 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:03:01,728 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:03:01,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:03:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:03:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-13 05:03:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:03:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 05:03:01,736 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-10-13 05:03:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:01,736 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 05:03:01,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:03:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 05:03:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:03:01,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:01,738 INFO L422 BasicCegarLoop]: trace histogram [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 05:03:01,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:03:01,739 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-13 05:03:01,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:01,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906140860] [2020-10-13 05:03:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:06,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:03:06,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:03:06,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4247 [2020-10-13 05:03:06,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:03:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:03:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:03:06,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:06,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:06,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:06,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:06,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:03:06,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:06,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:06,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:06,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:06,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:06,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:06,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:06,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:06,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:06,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:06,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:06,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:03:06,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906140860] [2020-10-13 05:03:06,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:06,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:03:06,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778103439] [2020-10-13 05:03:06,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:03:06,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:03:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:03:06,343 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-10-13 05:03:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:06,929 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-13 05:03:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:06,929 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-13 05:03:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:06,930 INFO L225 Difference]: With dead ends: 52 [2020-10-13 05:03:06,931 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:03:06,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:03:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:03:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-13 05:03:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:03:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-13 05:03:06,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 33 [2020-10-13 05:03:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:06,939 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-13 05:03:06,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:03:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-13 05:03:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:03:06,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:06,940 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:03:06,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:03:06,940 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-13 05:03:06,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:06,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927796811] [2020-10-13 05:03:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:11,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:11,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:11,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:03:11,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:03:11,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:11,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:03:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:03:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:03:11,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:12,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:12,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:12,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:12,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:12,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:12,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:12,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:12,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:12,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:03:12,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927796811] [2020-10-13 05:03:12,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:12,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:03:12,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809039902] [2020-10-13 05:03:12,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:03:12,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:03:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:03:12,239 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2020-10-13 05:03:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:12,726 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-13 05:03:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:03:12,726 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 05:03:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:12,728 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:03:12,728 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:03:12,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:03:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-13 05:03:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:03:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-13 05:03:12,738 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 36 [2020-10-13 05:03:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:12,738 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-13 05:03:12,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:03:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-13 05:03:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:03:12,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:12,739 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:03:12,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:03:12,740 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1906589063, now seen corresponding path program 3 times [2020-10-13 05:03:12,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:12,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222125668] [2020-10-13 05:03:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:12,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:17,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:03:17,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 05:03:17,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:03:17,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:03:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:03:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:03:17,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:17,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:17,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:17,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:17,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:17,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:17,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:17,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:17,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:17,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:17,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:03:17,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222125668] [2020-10-13 05:03:17,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:17,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:03:17,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825419361] [2020-10-13 05:03:17,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:03:17,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:03:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:03:17,935 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 11 states. [2020-10-13 05:03:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:18,309 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-13 05:03:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:03:18,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-13 05:03:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:18,310 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:03:18,311 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:03:18,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:03:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-13 05:03:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:03:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-13 05:03:18,331 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 36 [2020-10-13 05:03:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:18,332 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-13 05:03:18,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:03:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-13 05:03:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:03:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:18,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:03:18,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:03:18,337 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash -768762887, now seen corresponding path program 4 times [2020-10-13 05:03:18,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:18,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601896273] [2020-10-13 05:03:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:23,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:03:23,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-13 05:03:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:03:23,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:23,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:03:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:03:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:03:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:23,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:23,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:23,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:23,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:23,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:23,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:23,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:23,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:23,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:23,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:23,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:23,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:23,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:23,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:23,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:03:23,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601896273] [2020-10-13 05:03:23,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:23,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:03:23,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563451133] [2020-10-13 05:03:23,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:03:23,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:23,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:03:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:03:23,422 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 6 states. [2020-10-13 05:03:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:23,553 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-13 05:03:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:03:23,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 05:03:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:23,555 INFO L225 Difference]: With dead ends: 78 [2020-10-13 05:03:23,555 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:03:23,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:03:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:03:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-13 05:03:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:03:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-13 05:03:23,570 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2020-10-13 05:03:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:23,573 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-13 05:03:23,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:03:23,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-13 05:03:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:03:23,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:23,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-13 05:03:23,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:03:23,575 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -67698309, now seen corresponding path program 5 times [2020-10-13 05:03:23,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:23,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015636459] [2020-10-13 05:03:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:03:28,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:03:28,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:28,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:03:28,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:28,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:28,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:28,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:28,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:28,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:28,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:28,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:28,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:28,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:28,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:28,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:28,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:28,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:03:28,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015636459] [2020-10-13 05:03:28,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:28,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:03:28,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450647285] [2020-10-13 05:03:28,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:03:28,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:03:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:03:28,676 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 10 states. [2020-10-13 05:03:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:28,867 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-13 05:03:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:03:28,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 05:03:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:28,869 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:03:28,870 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:03:28,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:03:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:03:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-13 05:03:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:03:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-13 05:03:28,889 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 39 [2020-10-13 05:03:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:28,889 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-13 05:03:28,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:03:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-13 05:03:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:03:28,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:28,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-13 05:03:28,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:03:28,893 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 6 times [2020-10-13 05:03:28,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:28,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443275186] [2020-10-13 05:03:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:33,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:03:33,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:03:33,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:34,340 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-13 05:03:34,466 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-13 05:03:34,604 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-13 05:03:34,739 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-13 05:03:35,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:35,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:03:35,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443275186] [2020-10-13 05:03:35,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:35,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:03:35,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18656926] [2020-10-13 05:03:35,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:03:35,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:03:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:35,099 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 20 states. [2020-10-13 05:03:36,032 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 05:03:36,368 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 05:03:36,583 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-13 05:03:37,100 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 05:03:37,297 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 05:03:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:37,414 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-13 05:03:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:03:37,414 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-13 05:03:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:37,416 INFO L225 Difference]: With dead ends: 85 [2020-10-13 05:03:37,416 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:03:37,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:03:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:03:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-10-13 05:03:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:03:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-13 05:03:37,427 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 39 [2020-10-13 05:03:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:37,427 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-13 05:03:37,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:03:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-13 05:03:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:03:37,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:37,428 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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 05:03:37,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:03:37,429 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash 76822873, now seen corresponding path program 7 times [2020-10-13 05:03:37,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:37,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691421128] [2020-10-13 05:03:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:42,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:03:42,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:42,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:42,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:42,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:42,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:42,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:42,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:42,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:03:42,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691421128] [2020-10-13 05:03:42,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:42,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:03:42,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011237370] [2020-10-13 05:03:42,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:03:42,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:03:42,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:03:42,634 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 12 states. [2020-10-13 05:03:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:43,256 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-10-13 05:03:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:03:43,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-13 05:03:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:43,258 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:03:43,258 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:03:43,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:03:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:03:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-10-13 05:03:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:03:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-13 05:03:43,281 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 42 [2020-10-13 05:03:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:43,282 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-13 05:03:43,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:03:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-13 05:03:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:03:43,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:43,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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 05:03:43,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:03:43,284 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1535517900, now seen corresponding path program 8 times [2020-10-13 05:03:43,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:43,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589183993] [2020-10-13 05:03:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:45,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:48,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:03:48,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-13 05:03:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 05:03:48,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:03:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:03:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:03:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:48,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:48,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:48,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:48,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:48,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 05:03:48,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589183993] [2020-10-13 05:03:48,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:03:48,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:03:48,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206049852] [2020-10-13 05:03:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:03:48,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:03:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:03:48,392 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 5 states. [2020-10-13 05:03:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:48,486 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2020-10-13 05:03:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:03:48,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-13 05:03:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:48,491 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:03:48,491 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:03:48,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:03:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:03:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-13 05:03:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:03:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-13 05:03:48,502 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 42 [2020-10-13 05:03:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:48,502 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-13 05:03:48,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:03:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-13 05:03:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:03:48,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:48,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 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 05:03:48,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:03:48,503 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash 279855222, now seen corresponding path program 9 times [2020-10-13 05:03:48,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:48,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970314335] [2020-10-13 05:03:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:48,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:48,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:03:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:03:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:03:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:03:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:03:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:53,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:53,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:53,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:53,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:53,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:53,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:53,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:03:53,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970314335] [2020-10-13 05:03:53,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:53,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:03:53,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725813816] [2020-10-13 05:03:53,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:03:53,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:03:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:03:53,600 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 12 states. [2020-10-13 05:03:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:53,851 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-13 05:03:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:03:53,852 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-13 05:03:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:53,852 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:03:53,852 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:03:53,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:03:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-13 05:03:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:03:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 05:03:53,865 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 45 [2020-10-13 05:03:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:53,866 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 05:03:53,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:03:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 05:03:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:03:53,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:53,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 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 05:03:53,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:03:53,867 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2125987335, now seen corresponding path program 10 times [2020-10-13 05:03:53,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:53,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071281301] [2020-10-13 05:03:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:56,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:58,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:03:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:03:58,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:59,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:59,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:59,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:59,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:59,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:59,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:59,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071281301] [2020-10-13 05:03:59,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:59,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:03:59,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051251602] [2020-10-13 05:03:59,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:03:59,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:03:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:59,430 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 21 states. [2020-10-13 05:04:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:00,461 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-13 05:04:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:04:00,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-13 05:04:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:00,463 INFO L225 Difference]: With dead ends: 82 [2020-10-13 05:04:00,463 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 05:04:00,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:04:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 05:04:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-13 05:04:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:04:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-13 05:04:00,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 45 [2020-10-13 05:04:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:00,480 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-13 05:04:00,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:04:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-13 05:04:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:04:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:00,482 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 2, 2, 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 05:04:00,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:04:00,482 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash 842193113, now seen corresponding path program 11 times [2020-10-13 05:04:00,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:00,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740326079] [2020-10-13 05:04:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:03,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:04,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:05,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:04:05,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-13 05:04:05,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:04:05,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:05,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:04:05,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:05,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:04:05,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:05,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:05,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:05,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:05,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:05,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:05,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:05,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:05,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:05,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:05,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:05,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:05,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:05,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:04:05,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740326079] [2020-10-13 05:04:05,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:05,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:04:05,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202580878] [2020-10-13 05:04:05,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:04:05,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:04:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:04:05,612 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 14 states. [2020-10-13 05:04:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:05,912 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-13 05:04:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:04:05,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 05:04:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:05,914 INFO L225 Difference]: With dead ends: 107 [2020-10-13 05:04:05,914 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:04:05,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:04:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:04:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-13 05:04:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:04:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-13 05:04:05,924 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 51 [2020-10-13 05:04:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:05,924 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-13 05:04:05,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:04:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-13 05:04:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:04:05,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:05,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 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 05:04:05,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:04:05,925 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1634702732, now seen corresponding path program 12 times [2020-10-13 05:04:05,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:05,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894873561] [2020-10-13 05:04:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:07,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:07,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:10,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:12,319 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-13 05:04:12,879 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2020-10-13 05:04:13,305 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2020-10-13 05:04:13,785 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-13 05:04:14,022 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 05:04:14,280 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-13 05:04:14,544 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-13 05:04:14,728 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-13 05:04:14,923 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-13 05:04:15,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:15,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:15,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:15,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:15,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:15,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:15,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:15,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:15,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:15,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:15,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:15,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:15,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:15,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:15,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:04:15,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894873561] [2020-10-13 05:04:15,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:15,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:04:15,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037860718] [2020-10-13 05:04:15,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:04:15,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:04:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:15,303 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-10-13 05:04:15,821 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:04:16,029 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-13 05:04:16,203 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-13 05:04:16,548 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 05:04:16,710 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-13 05:04:17,201 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-13 05:04:17,460 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-13 05:04:18,072 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 113 [2020-10-13 05:04:18,278 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 05:04:18,504 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-13 05:04:18,862 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 98 [2020-10-13 05:04:19,388 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 104 [2020-10-13 05:04:19,860 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2020-10-13 05:04:20,405 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2020-10-13 05:04:20,830 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 05:04:21,230 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-10-13 05:04:22,009 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 82 [2020-10-13 05:04:22,398 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 85 [2020-10-13 05:04:22,911 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 79 [2020-10-13 05:04:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:22,970 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-13 05:04:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:04:22,971 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-13 05:04:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:22,972 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:04:22,972 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:04:22,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=407, Invalid=2899, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:04:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:04:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 05:04:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 05:04:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-13 05:04:22,985 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 51 [2020-10-13 05:04:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:22,986 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-13 05:04:22,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:04:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-13 05:04:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:04:22,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:22,986 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 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 05:04:22,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:04:22,987 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2072294779, now seen corresponding path program 13 times [2020-10-13 05:04:22,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:22,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081889167] [2020-10-13 05:04:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:27,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:27,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:04:27,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:28,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:28,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:28,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:28,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:28,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:28,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:28,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:28,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:28,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:28,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:04:28,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081889167] [2020-10-13 05:04:28,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:28,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:04:28,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716263791] [2020-10-13 05:04:28,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:04:28,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:04:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:04:28,426 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 15 states. [2020-10-13 05:04:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:29,247 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-13 05:04:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:04:29,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-13 05:04:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:29,249 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:04:29,249 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:04:29,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:04:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-10-13 05:04:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:04:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 05:04:29,259 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-10-13 05:04:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:29,259 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 05:04:29,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:04:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 05:04:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:04:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:29,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 3, 2, 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 05:04:29,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:04:29,260 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 741062932, now seen corresponding path program 14 times [2020-10-13 05:04:29,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:29,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804858748] [2020-10-13 05:04:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:31,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:34,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:34,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:04:34,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:04:34,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:04:34,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:34,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:04:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:04:34,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:34,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:34,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:34,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:34,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:34,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:34,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:34,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:34,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:34,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:34,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:34,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:34,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:34,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:34,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:34,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 67 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:04:34,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804858748] [2020-10-13 05:04:34,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:34,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:04:34,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784745431] [2020-10-13 05:04:34,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:04:34,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:04:34,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:04:34,480 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-10-13 05:04:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:34,941 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-13 05:04:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:04:34,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-13 05:04:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:34,943 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:04:34,943 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:04:34,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:04:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:04:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2020-10-13 05:04:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:04:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 05:04:34,954 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2020-10-13 05:04:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:34,955 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 05:04:34,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:04:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 05:04:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:04:34,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:34,956 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 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 05:04:34,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:04:34,956 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1434383273, now seen corresponding path program 15 times [2020-10-13 05:04:34,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:34,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099717674] [2020-10-13 05:04:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:34,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:39,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:39,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:39,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:39,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:04:39,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:04:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:04:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:04:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:04:39,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:41,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:41,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:41,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099717674] [2020-10-13 05:04:41,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:41,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:04:41,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035430471] [2020-10-13 05:04:41,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:04:41,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:04:41,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:41,663 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 29 states. [2020-10-13 05:04:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:44,257 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-13 05:04:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:04:44,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-13 05:04:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:44,259 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:04:44,259 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:04:44,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:04:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:04:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-10-13 05:04:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:04:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 05:04:44,274 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 57 [2020-10-13 05:04:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:44,274 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 05:04:44,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:04:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 05:04:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:04:44,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:44,275 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 3, 3, 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 05:04:44,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:04:44,275 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash 931538103, now seen corresponding path program 16 times [2020-10-13 05:04:44,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:44,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076154253] [2020-10-13 05:04:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:47,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:49,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:04:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:04:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:49,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:49,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:49,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:49,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:49,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:49,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:49,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:49,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:49,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:04:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 89 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:04:49,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076154253] [2020-10-13 05:04:49,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:49,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:04:49,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090670506] [2020-10-13 05:04:49,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:04:49,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:04:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:04:49,586 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2020-10-13 05:04:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:50,165 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2020-10-13 05:04:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:04:50,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-13 05:04:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:50,167 INFO L225 Difference]: With dead ends: 128 [2020-10-13 05:04:50,167 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:04:50,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:04:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2020-10-13 05:04:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:04:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 05:04:50,187 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2020-10-13 05:04:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:50,187 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 05:04:50,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:04:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 05:04:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:04:50,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:50,189 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 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 05:04:50,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:04:50,189 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1726425582, now seen corresponding path program 17 times [2020-10-13 05:04:50,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:50,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164754507] [2020-10-13 05:04:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:51,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:51,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:51,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:51,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:55,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:04:55,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:57,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:57,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:57,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:57,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:57,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:57,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:57,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:57,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:57,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:57,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:57,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:57,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:57,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164754507] [2020-10-13 05:04:57,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:57,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:04:57,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399644198] [2020-10-13 05:04:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:04:57,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:04:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:04:57,753 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 33 states. [2020-10-13 05:05:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:00,532 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-13 05:05:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:05:00,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-13 05:05:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:00,536 INFO L225 Difference]: With dead ends: 106 [2020-10-13 05:05:00,536 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 05:05:00,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:05:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 05:05:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2020-10-13 05:05:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:05:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 05:05:00,548 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 63 [2020-10-13 05:05:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:00,548 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 05:05:00,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:05:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 05:05:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:05:00,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:00,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 4, 3, 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 05:05:00,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:05:00,549 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 26244658, now seen corresponding path program 18 times [2020-10-13 05:05:00,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:00,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028135994] [2020-10-13 05:05:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:00,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:05:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:05,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:05:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:05,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:05,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 95 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:05:05,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028135994] [2020-10-13 05:05:05,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:05,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:05:05,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177740478] [2020-10-13 05:05:05,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:05:05,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:05,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:05:05,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:05:05,800 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-10-13 05:05:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:06,268 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2020-10-13 05:05:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:05:06,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-10-13 05:05:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:06,269 INFO L225 Difference]: With dead ends: 140 [2020-10-13 05:05:06,270 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:05:06,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:05:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:05:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-10-13 05:05:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:05:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 05:05:06,284 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 69 [2020-10-13 05:05:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:06,284 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 05:05:06,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:05:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 05:05:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:05:06,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:06,285 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 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 05:05:06,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:05:06,285 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:06,286 INFO L82 PathProgramCache]: Analyzing trace with hash 698157877, now seen corresponding path program 19 times [2020-10-13 05:05:06,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:06,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817762886] [2020-10-13 05:05:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:07,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:07,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:09,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:10,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:11,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:11,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:11,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:05:11,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:05:11,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5426 [2020-10-13 05:05:11,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:11,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:05:11,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:05:11,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:05:11,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:05:13,675 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2020-10-13 05:05:13,975 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-10-13 05:05:14,217 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 48 [2020-10-13 05:05:15,118 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 88 [2020-10-13 05:05:16,087 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 102 [2020-10-13 05:05:17,134 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 105 [2020-10-13 05:05:18,529 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 162 DAG size of output: 123 [2020-10-13 05:05:19,189 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 96 [2020-10-13 05:05:20,791 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 153 DAG size of output: 120 [2020-10-13 05:05:21,411 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2020-10-13 05:05:21,984 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-10-13 05:05:22,291 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-13 05:05:22,606 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 05:05:22,847 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-13 05:05:23,122 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-13 05:05:24,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:24,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:24,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:24,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:24,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:24,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:05:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:24,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:05:24,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:05:24,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 46 proven. 136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:05:24,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817762886] [2020-10-13 05:05:24,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:24,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:05:24,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860615941] [2020-10-13 05:05:24,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:05:24,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:05:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:05:24,426 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 40 states. [2020-10-13 05:05:26,318 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 05:05:27,402 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-13 05:05:27,682 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-13 05:05:28,331 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2020-10-13 05:05:30,590 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 419 DAG size of output: 153 [2020-10-13 05:05:31,440 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-13 05:05:39,442 WARN L193 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 410 DAG size of output: 331 [2020-10-13 05:05:40,399 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 103 [2020-10-13 05:05:41,718 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 111 [2020-10-13 05:05:42,684 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 05:05:44,663 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 147 DAG size of output: 128 [2020-10-13 05:05:46,751 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 175 DAG size of output: 156 [2020-10-13 05:05:47,364 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-13 05:05:47,812 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 05:05:48,211 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-13 05:05:55,410 WARN L193 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 378 DAG size of output: 308 [2020-10-13 05:06:03,082 WARN L193 SmtUtils]: Spent 7.44 s on a formula simplification. DAG size of input: 380 DAG size of output: 310 [2020-10-13 05:06:11,565 WARN L193 SmtUtils]: Spent 7.89 s on a formula simplification. DAG size of input: 377 DAG size of output: 308 [2020-10-13 05:06:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:11,707 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-13 05:06:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:06:11,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 69 [2020-10-13 05:06:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:11,711 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:06:11,711 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 05:06:11,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=479, Invalid=5373, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:06:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 05:06:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2020-10-13 05:06:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:06:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 05:06:11,730 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 69 [2020-10-13 05:06:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:11,730 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 05:06:11,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:06:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 05:06:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:06:11,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:11,732 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 4, 4, 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 05:06:11,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:06:11,732 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash 80938261, now seen corresponding path program 20 times [2020-10-13 05:06:11,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:11,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789682699] [2020-10-13 05:06:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:13,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:13,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:16,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:16,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:06:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:17,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:17,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:17,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:17,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:17,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:17,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 142 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:06:17,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789682699] [2020-10-13 05:06:17,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:17,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:06:17,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466405891] [2020-10-13 05:06:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:06:17,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:06:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:06:17,126 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 22 states. [2020-10-13 05:06:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:17,865 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2020-10-13 05:06:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:06:17,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-10-13 05:06:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:17,868 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:06:17,868 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:06:17,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:06:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:06:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2020-10-13 05:06:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:06:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 05:06:17,892 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-10-13 05:06:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:17,894 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 05:06:17,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:06:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 05:06:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:06:17,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:17,895 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 4, 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 05:06:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:06:17,895 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1840514608, now seen corresponding path program 21 times [2020-10-13 05:06:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:17,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191568814] [2020-10-13 05:06:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:20,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5387 [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:06:23,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:06:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:23,757 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-13 05:06:24,925 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-13 05:06:25,088 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-13 05:06:25,260 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-13 05:06:25,882 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 05:06:26,229 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-13 05:06:26,607 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-13 05:06:28,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:28,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:28,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 6 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:28,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191568814] [2020-10-13 05:06:28,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:28,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:06:28,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954141627] [2020-10-13 05:06:28,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:06:28,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:06:28,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:06:28,490 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 41 states. [2020-10-13 05:06:30,321 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-13 05:06:30,637 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-13 05:06:31,477 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 05:06:31,793 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-13 05:06:32,345 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-13 05:06:32,736 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-13 05:06:33,061 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 05:06:33,503 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 05:06:33,889 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-13 05:06:34,350 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-13 05:06:34,908 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-13 05:06:35,273 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 05:06:35,586 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 05:06:36,103 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-13 05:06:36,464 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 05:06:36,907 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-13 05:06:37,417 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 05:06:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:37,764 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-13 05:06:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:06:37,766 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-10-13 05:06:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:37,767 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:06:37,767 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:06:37,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=320, Invalid=3340, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 05:06:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:06:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-10-13 05:06:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:06:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 05:06:37,785 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 75 [2020-10-13 05:06:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:37,785 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 05:06:37,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:06:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 05:06:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:06:37,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:37,788 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 5, 4, 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 05:06:37,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:06:37,788 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash 335714256, now seen corresponding path program 22 times [2020-10-13 05:06:37,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:37,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33074147] [2020-10-13 05:06:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:37,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:37,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:38,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking...