/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-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:19:01,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:19:01,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:19:01,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:19:01,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:19:01,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:19:01,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:19:01,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:19:01,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:19:01,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:19:01,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:19:01,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:19:01,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:19:01,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:19:01,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:19:01,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:19:01,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:19:01,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:19:01,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:19:01,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:19:01,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:19:01,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:19:01,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:19:01,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:19:01,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:19:01,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:19:01,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:19:01,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:19:01,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:19:01,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:19:01,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:19:01,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:19:01,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:19:01,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:19:01,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:19:01,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:19:01,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:19:01,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:19:01,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:19:01,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:19:01,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:19:01,933 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 05:19:01,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:19:01,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:19:01,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:19:01,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:19:01,975 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:19:01,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:19:01,975 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:19:01,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:19:01,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:19:01,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:19:01,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:19:01,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:19:01,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:19:01,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:19:01,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:19:01,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:19:01,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:19:01,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:19:01,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:19:01,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:19:01,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:19:01,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:19:01,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:19:01,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:19:01,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:19:01,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:19:01,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:19:01,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:19:01,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:19:01,981 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 05:19:02,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:19:02,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:19:02,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:19:02,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:19:02,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:19:02,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-13 05:19:02,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2501c0e2b/036bfb365b164fc488df9f749d0a2571/FLAG3ab13c757 [2020-10-13 05:19:02,850 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:19:02,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-13 05:19:02,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2501c0e2b/036bfb365b164fc488df9f749d0a2571/FLAG3ab13c757 [2020-10-13 05:19:03,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2501c0e2b/036bfb365b164fc488df9f749d0a2571 [2020-10-13 05:19:03,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:19:03,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:19:03,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:19:03,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:19:03,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:19:03,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b6dc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03, skipping insertion in model container [2020-10-13 05:19:03,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:19:03,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:19:03,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:19:03,446 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:19:03,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:19:03,482 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:19:03,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03 WrapperNode [2020-10-13 05:19:03,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:19:03,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:19:03,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:19:03,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:19:03,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (1/1) ... [2020-10-13 05:19:03,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:19:03,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:19:03,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:19:03,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:19:03,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (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 05:19:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:19:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:19:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:19:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:19:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:19:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:19:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:19:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 05:19:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 05:19:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:19:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:19:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:19:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:19:03,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:19:03,982 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:19:03,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:19:03 BoogieIcfgContainer [2020-10-13 05:19:03,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:19:03,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:19:03,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:19:03,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:19:03,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:19:03" (1/3) ... [2020-10-13 05:19:03,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c272f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:19:03, skipping insertion in model container [2020-10-13 05:19:03,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:19:03" (2/3) ... [2020-10-13 05:19:03,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c272f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:19:03, skipping insertion in model container [2020-10-13 05:19:03,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:19:03" (3/3) ... [2020-10-13 05:19:03,998 INFO L109 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2020-10-13 05:19:04,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:19:04,020 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:19:04,038 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:19:04,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:19:04,069 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:19:04,070 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:19:04,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:19:04,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:19:04,070 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:19:04,070 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:19:04,070 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:19:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-13 05:19:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:19:04,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:04,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:04,101 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash 554320188, now seen corresponding path program 1 times [2020-10-13 05:19:04,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:04,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82658836] [2020-10-13 05:19:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:04,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:04,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:04,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:04,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:19:04,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-13 05:19:04,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:19:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:19:04,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:19:05,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:05,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:05,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 05:19:05,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:05,041 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 05:19:05,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82658836] [2020-10-13 05:19:05,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:19:05,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:19:05,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721800997] [2020-10-13 05:19:05,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:19:05,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:19:05,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:19:05,075 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-13 05:19:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:05,327 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2020-10-13 05:19:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:19:05,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:19:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:05,341 INFO L225 Difference]: With dead ends: 63 [2020-10-13 05:19:05,342 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:19:05,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:19:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:19:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-13 05:19:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:19:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-13 05:19:05,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2020-10-13 05:19:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:05,402 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-13 05:19:05,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:19:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-13 05:19:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:19:05,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:05,403 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] [2020-10-13 05:19:05,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:19:05,404 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:05,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2023958242, now seen corresponding path program 1 times [2020-10-13 05:19:05,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:05,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632565893] [2020-10-13 05:19:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:06,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:19:06,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:19:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-13 05:19:06,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:19:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:19:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:19:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:06,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:06,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:06,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:06,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:19:06,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:06,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:06,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:06,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:06,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632565893] [2020-10-13 05:19:06,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:19:06,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:19:06,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999216766] [2020-10-13 05:19:06,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:19:06,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:19:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:19:06,553 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-10-13 05:19:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:06,720 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-10-13 05:19:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:19:06,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 05:19:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:06,722 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:19:06,722 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:19:06,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 05:19:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:19:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-10-13 05:19:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:19:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-13 05:19:06,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2020-10-13 05:19:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:06,739 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-13 05:19:06,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:19:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-13 05:19:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:19:06,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:06,742 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] [2020-10-13 05:19:06,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:19:06,743 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152228, now seen corresponding path program 1 times [2020-10-13 05:19:06,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:06,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047734692] [2020-10-13 05:19:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:06,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:07,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:19:07,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:19:07,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-13 05:19:07,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:19:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:07,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:19:07,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:07,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:07,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:07,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:07,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:07,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:19:07,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:07,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047734692] [2020-10-13 05:19:07,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:07,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:19:07,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700458540] [2020-10-13 05:19:07,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:19:07,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:19:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:19:07,888 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-10-13 05:19:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:08,044 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-13 05:19:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:19:08,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 05:19:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:08,046 INFO L225 Difference]: With dead ends: 67 [2020-10-13 05:19:08,046 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:19:08,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:19:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:19:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-13 05:19:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:19:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-13 05:19:08,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 20 [2020-10-13 05:19:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:08,056 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-13 05:19:08,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:19:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-13 05:19:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:19:08,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:08,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:08,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:19:08,058 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1732225596, now seen corresponding path program 2 times [2020-10-13 05:19:08,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:08,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543081824] [2020-10-13 05:19:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:08,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:09,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:10,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:19:10,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:19:10,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2548 [2020-10-13 05:19:10,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:19:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:19:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:10,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:10,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:10,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:10,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:19:10,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:10,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:10,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:10,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:10,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543081824] [2020-10-13 05:19:10,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:10,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:19:10,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330541699] [2020-10-13 05:19:10,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:19:10,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:19:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:19:10,684 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2020-10-13 05:19:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:10,851 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2020-10-13 05:19:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:19:10,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 05:19:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:10,852 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:19:10,853 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:19:10,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:19:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:19:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-13 05:19:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:19:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-13 05:19:10,862 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 25 [2020-10-13 05:19:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:10,862 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-13 05:19:10,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:19:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-13 05:19:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:19:10,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:10,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:10,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:19:10,864 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:10,865 INFO L82 PathProgramCache]: Analyzing trace with hash -714249500, now seen corresponding path program 3 times [2020-10-13 05:19:10,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:10,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028785353] [2020-10-13 05:19:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:13,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:15,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:19:15,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-13 05:19:15,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:19:15,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:15,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:19:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:19:15,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:15,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:15,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:15,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:19:15,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:15,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:15,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:15,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:15,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028785353] [2020-10-13 05:19:15,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:15,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:19:15,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470984288] [2020-10-13 05:19:15,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:19:15,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:15,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:19:15,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:19:15,992 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-10-13 05:19:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:16,192 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2020-10-13 05:19:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:19:16,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:19:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:16,195 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:19:16,195 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:19:16,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:19:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:19:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2020-10-13 05:19:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:19:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-13 05:19:16,216 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 30 [2020-10-13 05:19:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:16,216 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-13 05:19:16,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:19:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-13 05:19:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:19:16,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:16,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:16,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:19:16,219 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash -58338500, now seen corresponding path program 4 times [2020-10-13 05:19:16,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:16,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942747668] [2020-10-13 05:19:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:16,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:20,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:20,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:21,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:19:21,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-13 05:19:21,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:19:21,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:19:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:19:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:21,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:21,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:21,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:21,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:21,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:21,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942747668] [2020-10-13 05:19:21,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:21,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:19:21,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542894742] [2020-10-13 05:19:21,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:19:21,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:19:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:19:21,320 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 8 states. [2020-10-13 05:19:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:21,555 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2020-10-13 05:19:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:19:21,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:19:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:21,557 INFO L225 Difference]: With dead ends: 106 [2020-10-13 05:19:21,559 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:19:21,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:19:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:19:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2020-10-13 05:19:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:19:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-13 05:19:21,578 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 35 [2020-10-13 05:19:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:21,578 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-13 05:19:21,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:19:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-13 05:19:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:19:21,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:21,580 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:21,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:19:21,581 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1835474460, now seen corresponding path program 5 times [2020-10-13 05:19:21,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:21,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571654259] [2020-10-13 05:19:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:21,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:26,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:19:26,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 40 [2020-10-13 05:19:26,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:19:26,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:19:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:19:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:26,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:26,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:26,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:26,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571654259] [2020-10-13 05:19:26,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:26,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:19:26,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634201228] [2020-10-13 05:19:26,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:19:26,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:19:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:19:26,694 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 9 states. [2020-10-13 05:19:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:26,891 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2020-10-13 05:19:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:19:26,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-13 05:19:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:26,892 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:19:26,893 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 05:19:26,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:19:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 05:19:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2020-10-13 05:19:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:19:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-10-13 05:19:26,901 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 40 [2020-10-13 05:19:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:26,902 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-10-13 05:19:26,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:19:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-10-13 05:19:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:19:26,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:26,903 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:26,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:19:26,904 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash -756237252, now seen corresponding path program 6 times [2020-10-13 05:19:26,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:26,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61199982] [2020-10-13 05:19:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:29,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:31,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:31,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:19:31,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:19:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:32,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:32,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:32,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:32,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:32,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61199982] [2020-10-13 05:19:32,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:32,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:19:32,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176021673] [2020-10-13 05:19:32,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:19:32,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:32,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:19:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:19:32,020 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 10 states. [2020-10-13 05:19:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:32,223 INFO L93 Difference]: Finished difference Result 132 states and 184 transitions. [2020-10-13 05:19:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:19:32,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 05:19:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:32,225 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:19:32,226 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:19:32,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:19:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:19:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2020-10-13 05:19:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:19:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-10-13 05:19:32,234 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 45 [2020-10-13 05:19:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:32,235 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-10-13 05:19:32,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:19:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-10-13 05:19:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:19:32,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:32,236 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:32,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:19:32,237 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1696307428, now seen corresponding path program 7 times [2020-10-13 05:19:32,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:32,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588019403] [2020-10-13 05:19:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:32,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:36,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:36,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:37,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:19:37,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:37,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:37,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:37,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:37,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:37,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:37,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588019403] [2020-10-13 05:19:37,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:37,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:19:37,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17425521] [2020-10-13 05:19:37,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:19:37,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:19:37,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:19:37,386 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-10-13 05:19:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:37,629 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2020-10-13 05:19:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:19:37,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-13 05:19:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:37,631 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:19:37,631 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 05:19:37,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:19:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 05:19:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-10-13 05:19:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:19:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2020-10-13 05:19:37,649 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 50 [2020-10-13 05:19:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:37,649 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2020-10-13 05:19:37,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:19:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2020-10-13 05:19:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:19:37,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:37,653 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:37,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:19:37,653 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589252, now seen corresponding path program 8 times [2020-10-13 05:19:37,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:37,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455628954] [2020-10-13 05:19:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:38,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:40,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:41,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 46 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:19:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:42,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:42,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:42,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:42,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:42,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455628954] [2020-10-13 05:19:42,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:42,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:19:42,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941829155] [2020-10-13 05:19:42,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:19:42,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:42,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:19:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:19:42,826 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 12 states. [2020-10-13 05:19:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:43,070 INFO L93 Difference]: Finished difference Result 158 states and 222 transitions. [2020-10-13 05:19:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:19:43,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-13 05:19:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:43,073 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:19:43,073 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:19:43,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:19:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:19:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 83. [2020-10-13 05:19:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:19:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2020-10-13 05:19:43,082 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 55 [2020-10-13 05:19:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:43,082 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2020-10-13 05:19:43,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:19:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2020-10-13 05:19:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:19:43,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:43,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:43,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:19:43,084 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash -119173148, now seen corresponding path program 9 times [2020-10-13 05:19:43,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:43,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005157510] [2020-10-13 05:19:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:46,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:48,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:48,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:19:48,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 55 [2020-10-13 05:19:48,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-13 05:19:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:19:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:19:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:19:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:48,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:48,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:48,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:48,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:48,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:19:48,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:48,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:48,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:48,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005157510] [2020-10-13 05:19:48,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:48,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:19:48,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647327172] [2020-10-13 05:19:48,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:19:48,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:19:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:19:48,418 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand 13 states. [2020-10-13 05:19:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:48,823 INFO L93 Difference]: Finished difference Result 171 states and 241 transitions. [2020-10-13 05:19:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:19:48,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-13 05:19:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:48,825 INFO L225 Difference]: With dead ends: 171 [2020-10-13 05:19:48,825 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 05:19:48,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:19:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 05:19:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-13 05:19:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 05:19:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2020-10-13 05:19:48,842 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 60 [2020-10-13 05:19:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:48,843 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2020-10-13 05:19:48,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:19:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2020-10-13 05:19:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:19:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:48,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:48,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:19:48,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1734135356, now seen corresponding path program 10 times [2020-10-13 05:19:48,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:48,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565274794] [2020-10-13 05:19:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:50,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:52,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:53,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:53,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:53,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:53,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:19:53,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:54,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:54,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:54,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:54,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:54,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:54,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:54,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:54,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:54,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:54,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565274794] [2020-10-13 05:19:54,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:54,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:19:54,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815350290] [2020-10-13 05:19:54,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:19:54,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:19:54,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:19:54,069 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand 14 states. [2020-10-13 05:19:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:54,365 INFO L93 Difference]: Finished difference Result 184 states and 260 transitions. [2020-10-13 05:19:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:19:54,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-13 05:19:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:54,367 INFO L225 Difference]: With dead ends: 184 [2020-10-13 05:19:54,367 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 05:19:54,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:19:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 05:19:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 97. [2020-10-13 05:19:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:19:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-10-13 05:19:54,375 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 65 [2020-10-13 05:19:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:54,376 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-10-13 05:19:54,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:19:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-10-13 05:19:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:19:54,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:54,377 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:54,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:19:54,377 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash -840513820, now seen corresponding path program 11 times [2020-10-13 05:19:54,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:54,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964441587] [2020-10-13 05:19:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:54,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:54,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:56,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:57,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:19:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 05:19:59,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-13 05:19:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:19:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:19:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:59,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:59,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:59,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:59,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:59,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:19:59,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:59,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:59,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:19:59,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964441587] [2020-10-13 05:19:59,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:59,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:19:59,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696841630] [2020-10-13 05:19:59,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:19:59,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:19:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:19:59,684 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 15 states. [2020-10-13 05:20:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:00,096 INFO L93 Difference]: Finished difference Result 197 states and 279 transitions. [2020-10-13 05:20:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:20:00,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-13 05:20:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:00,101 INFO L225 Difference]: With dead ends: 197 [2020-10-13 05:20:00,101 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 05:20:00,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 05:20:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2020-10-13 05:20:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:20:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2020-10-13 05:20:00,119 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 70 [2020-10-13 05:20:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:00,120 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2020-10-13 05:20:00,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:20:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2020-10-13 05:20:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:20:00,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:00,129 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:00,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:20:00,130 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1703278396, now seen corresponding path program 12 times [2020-10-13 05:20:00,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:00,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949175275] [2020-10-13 05:20:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:01,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:02,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:05,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:20:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:05,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:05,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:05,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:05,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:05,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:05,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:05,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:05,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:05,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949175275] [2020-10-13 05:20:05,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:05,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:20:05,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929101584] [2020-10-13 05:20:05,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:20:05,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:05,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:20:05,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:05,382 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand 16 states. [2020-10-13 05:20:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:05,720 INFO L93 Difference]: Finished difference Result 210 states and 298 transitions. [2020-10-13 05:20:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:20:05,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-13 05:20:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:05,723 INFO L225 Difference]: With dead ends: 210 [2020-10-13 05:20:05,726 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:20:05,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:20:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2020-10-13 05:20:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 05:20:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2020-10-13 05:20:05,743 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 75 [2020-10-13 05:20:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:05,743 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2020-10-13 05:20:05,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:20:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2020-10-13 05:20:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:20:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:05,744 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:20:05,745 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash 940522980, now seen corresponding path program 13 times [2020-10-13 05:20:05,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:05,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574217228] [2020-10-13 05:20:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:08,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 05:20:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:10,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:10,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:10,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:10,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:10,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:10,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:10,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:10,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574217228] [2020-10-13 05:20:10,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:10,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:20:10,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840996826] [2020-10-13 05:20:10,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:20:10,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:20:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:10,958 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 17 states. [2020-10-13 05:20:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:11,346 INFO L93 Difference]: Finished difference Result 223 states and 317 transitions. [2020-10-13 05:20:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:20:11,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-13 05:20:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:11,349 INFO L225 Difference]: With dead ends: 223 [2020-10-13 05:20:11,349 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 05:20:11,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:20:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 05:20:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2020-10-13 05:20:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:20:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-10-13 05:20:11,357 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 80 [2020-10-13 05:20:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:11,358 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-10-13 05:20:11,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:20:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-10-13 05:20:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:20:11,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:11,359 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:11,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:20:11,359 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash 621797436, now seen corresponding path program 14 times [2020-10-13 05:20:11,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:11,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794977172] [2020-10-13 05:20:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:20:16,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:16,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-13 05:20:16,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:20:16,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:16,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:20:16,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:16,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:16,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:16,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:16,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:16,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:16,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794977172] [2020-10-13 05:20:16,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:16,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:20:16,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801558642] [2020-10-13 05:20:16,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:20:16,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:20:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:20:16,758 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 18 states. [2020-10-13 05:20:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:17,117 INFO L93 Difference]: Finished difference Result 236 states and 336 transitions. [2020-10-13 05:20:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:20:17,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-13 05:20:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:17,120 INFO L225 Difference]: With dead ends: 236 [2020-10-13 05:20:17,121 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 05:20:17,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:20:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 05:20:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 125. [2020-10-13 05:20:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 05:20:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2020-10-13 05:20:17,129 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 85 [2020-10-13 05:20:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:17,129 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2020-10-13 05:20:17,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:20:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2020-10-13 05:20:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:20:17,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:17,131 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:17,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:20:17,131 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1599010020, now seen corresponding path program 15 times [2020-10-13 05:20:17,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:17,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055606397] [2020-10-13 05:20:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:17,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:19,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:22,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 05:20:22,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:20:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:20:22,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:20:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 05:20:22,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:22,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:22,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:22,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:22,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055606397] [2020-10-13 05:20:22,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:22,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:20:22,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316423729] [2020-10-13 05:20:22,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:20:22,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:22,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:20:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:20:22,382 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand 19 states. [2020-10-13 05:20:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:22,803 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2020-10-13 05:20:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:20:22,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-13 05:20:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:22,806 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:20:22,806 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 05:20:22,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:20:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 05:20:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-10-13 05:20:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:20:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2020-10-13 05:20:22,814 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 90 [2020-10-13 05:20:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:22,814 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2020-10-13 05:20:22,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:20:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2020-10-13 05:20:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:20:22,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:22,815 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:22,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:20:22,816 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -200636100, now seen corresponding path program 16 times [2020-10-13 05:20:22,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:22,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11809006] [2020-10-13 05:20:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:22,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:23,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:28,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:28,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:20:28,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5467 [2020-10-13 05:20:28,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:20:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 05:20:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:28,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:28,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:28,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:28,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:28,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:28,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:28,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11809006] [2020-10-13 05:20:28,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:28,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:20:28,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462789916] [2020-10-13 05:20:28,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:20:28,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:20:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:20:28,537 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand 20 states. [2020-10-13 05:20:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:28,985 INFO L93 Difference]: Finished difference Result 262 states and 374 transitions. [2020-10-13 05:20:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:20:28,986 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-13 05:20:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:28,989 INFO L225 Difference]: With dead ends: 262 [2020-10-13 05:20:28,989 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 05:20:28,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:20:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 05:20:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 139. [2020-10-13 05:20:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 05:20:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2020-10-13 05:20:28,998 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 95 [2020-10-13 05:20:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:28,998 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2020-10-13 05:20:28,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:20:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2020-10-13 05:20:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 05:20:28,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:28,999 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:29,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:20:29,000 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1066789860, now seen corresponding path program 17 times [2020-10-13 05:20:29,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:29,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553108818] [2020-10-13 05:20:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:29,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:29,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 05:20:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:34,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:34,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:34,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:34,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553108818] [2020-10-13 05:20:34,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:34,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:20:34,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556232705] [2020-10-13 05:20:34,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:20:34,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:20:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:20:34,298 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 21 states. [2020-10-13 05:20:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:34,729 INFO L93 Difference]: Finished difference Result 275 states and 393 transitions. [2020-10-13 05:20:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:20:34,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-13 05:20:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:34,732 INFO L225 Difference]: With dead ends: 275 [2020-10-13 05:20:34,732 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 05:20:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:20:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 05:20:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 146. [2020-10-13 05:20:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 05:20:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2020-10-13 05:20:34,747 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 100 [2020-10-13 05:20:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:34,747 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2020-10-13 05:20:34,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:20:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2020-10-13 05:20:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 05:20:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:34,749 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:34,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:20:34,749 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash -863636932, now seen corresponding path program 18 times [2020-10-13 05:20:34,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:34,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403166953] [2020-10-13 05:20:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:34,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:38,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:20:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 05:20:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:40,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:40,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:40,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:40,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:40,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403166953] [2020-10-13 05:20:40,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:20:40,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116276878] [2020-10-13 05:20:40,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:20:40,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:20:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:20:40,065 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 22 states. [2020-10-13 05:20:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:40,560 INFO L93 Difference]: Finished difference Result 288 states and 412 transitions. [2020-10-13 05:20:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:20:40,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-13 05:20:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:40,563 INFO L225 Difference]: With dead ends: 288 [2020-10-13 05:20:40,563 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 05:20:40,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:20:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 05:20:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 153. [2020-10-13 05:20:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 05:20:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 213 transitions. [2020-10-13 05:20:40,574 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 213 transitions. Word has length 105 [2020-10-13 05:20:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:40,575 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 213 transitions. [2020-10-13 05:20:40,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:20:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 213 transitions. [2020-10-13 05:20:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:20:40,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:40,576 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:40,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:20:40,576 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1462492444, now seen corresponding path program 19 times [2020-10-13 05:20:40,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:40,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537551971] [2020-10-13 05:20:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:40,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:20:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 05:20:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:45,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:45,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:45,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:45,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537551971] [2020-10-13 05:20:45,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:45,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:20:45,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119909773] [2020-10-13 05:20:45,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:20:45,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:20:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:20:45,917 INFO L87 Difference]: Start difference. First operand 153 states and 213 transitions. Second operand 23 states. [2020-10-13 05:20:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:46,405 INFO L93 Difference]: Finished difference Result 301 states and 431 transitions. [2020-10-13 05:20:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:20:46,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-10-13 05:20:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:46,407 INFO L225 Difference]: With dead ends: 301 [2020-10-13 05:20:46,407 INFO L226 Difference]: Without dead ends: 288 [2020-10-13 05:20:46,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:20:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-13 05:20:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 160. [2020-10-13 05:20:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 05:20:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2020-10-13 05:20:46,416 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 110 [2020-10-13 05:20:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:46,416 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2020-10-13 05:20:46,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:20:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2020-10-13 05:20:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 05:20:46,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:46,417 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:46,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:20:46,418 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1418861372, now seen corresponding path program 20 times [2020-10-13 05:20:46,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:46,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453723189] [2020-10-13 05:20:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:46,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:47,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:52,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:52,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6221 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 05:20:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:54,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:54,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:54,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:54,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:54,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:54,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:54,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:54,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 34 proven. 167 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2020-10-13 05:20:54,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453723189] [2020-10-13 05:20:54,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:54,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:20:54,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831178787] [2020-10-13 05:20:54,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:20:54,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:20:54,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:54,883 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand 11 states. [2020-10-13 05:20:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:55,679 INFO L93 Difference]: Finished difference Result 500 states and 696 transitions. [2020-10-13 05:20:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:20:55,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 115 [2020-10-13 05:20:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:55,683 INFO L225 Difference]: With dead ends: 500 [2020-10-13 05:20:55,683 INFO L226 Difference]: Without dead ends: 350 [2020-10-13 05:20:55,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 36 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:20:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-13 05:20:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 262. [2020-10-13 05:20:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 05:20:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2020-10-13 05:20:55,701 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 115 [2020-10-13 05:20:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:55,702 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2020-10-13 05:20:55,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:20:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2020-10-13 05:20:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:20:55,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:55,705 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:55,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:20:55,706 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1538726932, now seen corresponding path program 1 times [2020-10-13 05:20:55,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:55,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516114752] [2020-10-13 05:20:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:55,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:56,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:21:00,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 05:21:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:01,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:01,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:01,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516114752] [2020-10-13 05:21:01,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:01,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:21:01,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296314859] [2020-10-13 05:21:01,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:21:01,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:21:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:21:01,245 INFO L87 Difference]: Start difference. First operand 262 states and 344 transitions. Second operand 24 states. [2020-10-13 05:21:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:01,849 INFO L93 Difference]: Finished difference Result 448 states and 605 transitions. [2020-10-13 05:21:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:21:01,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-10-13 05:21:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:01,852 INFO L225 Difference]: With dead ends: 448 [2020-10-13 05:21:01,852 INFO L226 Difference]: Without dead ends: 431 [2020-10-13 05:21:01,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-13 05:21:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 274. [2020-10-13 05:21:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 05:21:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 360 transitions. [2020-10-13 05:21:01,865 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 360 transitions. Word has length 116 [2020-10-13 05:21:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:01,866 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 360 transitions. [2020-10-13 05:21:01,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:21:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 360 transitions. [2020-10-13 05:21:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 05:21:01,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:01,868 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:01,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:21:01,868 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:01,868 INFO L82 PathProgramCache]: Analyzing trace with hash -963330252, now seen corresponding path program 2 times [2020-10-13 05:21:01,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:01,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809580076] [2020-10-13 05:21:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:02,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:06,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:06,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:21:06,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:06,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:21:06,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:21:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:06,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 05:21:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:07,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:07,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:07,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809580076] [2020-10-13 05:21:07,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:07,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:21:07,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790088474] [2020-10-13 05:21:07,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:21:07,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:21:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:07,259 INFO L87 Difference]: Start difference. First operand 274 states and 360 transitions. Second operand 25 states. [2020-10-13 05:21:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:07,814 INFO L93 Difference]: Finished difference Result 467 states and 631 transitions. [2020-10-13 05:21:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:21:07,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-13 05:21:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:07,817 INFO L225 Difference]: With dead ends: 467 [2020-10-13 05:21:07,817 INFO L226 Difference]: Without dead ends: 450 [2020-10-13 05:21:07,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-13 05:21:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 286. [2020-10-13 05:21:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 05:21:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 376 transitions. [2020-10-13 05:21:07,831 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 376 transitions. Word has length 121 [2020-10-13 05:21:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:07,832 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 376 transitions. [2020-10-13 05:21:07,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:21:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 376 transitions. [2020-10-13 05:21:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:21:07,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:07,834 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:07,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:21:07,834 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1957252884, now seen corresponding path program 3 times [2020-10-13 05:21:07,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:07,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614743973] [2020-10-13 05:21:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:08,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:11,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:13,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:21:13,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:13,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5639 [2020-10-13 05:21:13,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:21:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 05:21:13,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:13,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:13,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:13,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614743973] [2020-10-13 05:21:13,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:13,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:21:13,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183332041] [2020-10-13 05:21:13,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:21:13,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:21:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:13,888 INFO L87 Difference]: Start difference. First operand 286 states and 376 transitions. Second operand 26 states. [2020-10-13 05:21:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:14,425 INFO L93 Difference]: Finished difference Result 486 states and 657 transitions. [2020-10-13 05:21:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:21:14,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-10-13 05:21:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:14,430 INFO L225 Difference]: With dead ends: 486 [2020-10-13 05:21:14,430 INFO L226 Difference]: Without dead ends: 469 [2020-10-13 05:21:14,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-13 05:21:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 298. [2020-10-13 05:21:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-13 05:21:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 392 transitions. [2020-10-13 05:21:14,446 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 392 transitions. Word has length 126 [2020-10-13 05:21:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:14,447 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 392 transitions. [2020-10-13 05:21:14,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:21:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 392 transitions. [2020-10-13 05:21:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 05:21:14,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:14,449 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:14,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:21:14,449 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash 287248948, now seen corresponding path program 4 times [2020-10-13 05:21:14,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:14,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959374894] [2020-10-13 05:21:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:18,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:19,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:19,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 05:21:19,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:19,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:21:19,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:21:19,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:19,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 05:21:19,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:19,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:19,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:19,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:19,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:19,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:19,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:19,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:19,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:19,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:19,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959374894] [2020-10-13 05:21:19,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:19,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:21:19,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188880831] [2020-10-13 05:21:19,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:21:19,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:21:19,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:19,943 INFO L87 Difference]: Start difference. First operand 298 states and 392 transitions. Second operand 27 states. [2020-10-13 05:21:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:20,687 INFO L93 Difference]: Finished difference Result 505 states and 683 transitions. [2020-10-13 05:21:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:21:20,688 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-10-13 05:21:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:20,690 INFO L225 Difference]: With dead ends: 505 [2020-10-13 05:21:20,690 INFO L226 Difference]: Without dead ends: 488 [2020-10-13 05:21:20,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-13 05:21:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 310. [2020-10-13 05:21:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 05:21:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 408 transitions. [2020-10-13 05:21:20,705 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 408 transitions. Word has length 131 [2020-10-13 05:21:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:20,705 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 408 transitions. [2020-10-13 05:21:20,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:21:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 408 transitions. [2020-10-13 05:21:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:21:20,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:20,707 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:20,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:21:20,708 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -381141524, now seen corresponding path program 5 times [2020-10-13 05:21:20,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:20,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470824020] [2020-10-13 05:21:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:24,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:25,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:21:25,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:25,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 05:21:25,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:26,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:21:26,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:21:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:26,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470824020] [2020-10-13 05:21:26,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:26,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:21:26,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753845584] [2020-10-13 05:21:26,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:21:26,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:21:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:21:26,192 INFO L87 Difference]: Start difference. First operand 310 states and 408 transitions. Second operand 28 states. [2020-10-13 05:21:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:27,140 INFO L93 Difference]: Finished difference Result 524 states and 709 transitions. [2020-10-13 05:21:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:21:27,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-10-13 05:21:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:27,145 INFO L225 Difference]: With dead ends: 524 [2020-10-13 05:21:27,145 INFO L226 Difference]: Without dead ends: 507 [2020-10-13 05:21:27,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:21:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-13 05:21:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 322. [2020-10-13 05:21:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 05:21:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 424 transitions. [2020-10-13 05:21:27,164 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 424 transitions. Word has length 136 [2020-10-13 05:21:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:27,164 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 424 transitions. [2020-10-13 05:21:27,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:21:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 424 transitions. [2020-10-13 05:21:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 05:21:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:27,166 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:27,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:21:27,167 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1562223924, now seen corresponding path program 6 times [2020-10-13 05:21:27,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:27,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889345623] [2020-10-13 05:21:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:28,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5441 [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:21:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:32,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-13 05:21:32,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:33,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:33,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:33,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:33,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:33,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:33,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:33,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:33,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:33,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:33,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889345623] [2020-10-13 05:21:33,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:33,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:21:33,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176867498] [2020-10-13 05:21:33,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:21:33,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:21:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:21:33,068 INFO L87 Difference]: Start difference. First operand 322 states and 424 transitions. Second operand 29 states. [2020-10-13 05:21:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:33,790 INFO L93 Difference]: Finished difference Result 543 states and 735 transitions. [2020-10-13 05:21:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:21:33,791 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-13 05:21:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:33,794 INFO L225 Difference]: With dead ends: 543 [2020-10-13 05:21:33,794 INFO L226 Difference]: Without dead ends: 526 [2020-10-13 05:21:33,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:21:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-13 05:21:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 334. [2020-10-13 05:21:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-13 05:21:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 440 transitions. [2020-10-13 05:21:33,815 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 440 transitions. Word has length 141 [2020-10-13 05:21:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:33,815 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 440 transitions. [2020-10-13 05:21:33,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:21:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 440 transitions. [2020-10-13 05:21:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 05:21:33,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:33,818 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:33,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:21:33,818 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1148029676, now seen corresponding path program 7 times [2020-10-13 05:21:33,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:33,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792086780] [2020-10-13 05:21:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:38,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 05:21:38,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-13 05:21:38,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:39,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:39,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:39,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:39,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:21:39,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:39,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:39,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:39,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:39,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:39,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792086780] [2020-10-13 05:21:39,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:39,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:21:39,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753580307] [2020-10-13 05:21:39,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:21:39,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:21:39,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:21:39,544 INFO L87 Difference]: Start difference. First operand 334 states and 440 transitions. Second operand 30 states. [2020-10-13 05:21:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:40,434 INFO L93 Difference]: Finished difference Result 562 states and 761 transitions. [2020-10-13 05:21:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:21:40,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-10-13 05:21:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:40,437 INFO L225 Difference]: With dead ends: 562 [2020-10-13 05:21:40,437 INFO L226 Difference]: Without dead ends: 545 [2020-10-13 05:21:40,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:21:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-13 05:21:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 346. [2020-10-13 05:21:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-13 05:21:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 456 transitions. [2020-10-13 05:21:40,457 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 456 transitions. Word has length 146 [2020-10-13 05:21:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:40,458 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 456 transitions. [2020-10-13 05:21:40,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:21:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 456 transitions. [2020-10-13 05:21:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 05:21:40,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:40,460 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:40,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:21:40,460 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:40,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1774159820, now seen corresponding path program 8 times [2020-10-13 05:21:40,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:40,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297852366] [2020-10-13 05:21:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:54,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:54,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 05:21:54,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:54,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14157 [2020-10-13 05:21:54,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:21:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 05:21:54,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:55,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:21:55,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297852366] [2020-10-13 05:21:55,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:55,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:21:55,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030203346] [2020-10-13 05:21:55,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:21:55,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:21:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:21:55,192 INFO L87 Difference]: Start difference. First operand 346 states and 456 transitions. Second operand 31 states. [2020-10-13 05:21:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:56,088 INFO L93 Difference]: Finished difference Result 581 states and 787 transitions. [2020-10-13 05:21:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:21:56,088 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 151 [2020-10-13 05:21:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:56,091 INFO L225 Difference]: With dead ends: 581 [2020-10-13 05:21:56,091 INFO L226 Difference]: Without dead ends: 564 [2020-10-13 05:21:56,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:21:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-13 05:21:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 358. [2020-10-13 05:21:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 05:21:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 472 transitions. [2020-10-13 05:21:56,107 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 472 transitions. Word has length 151 [2020-10-13 05:21:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:56,108 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 472 transitions. [2020-10-13 05:21:56,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:21:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 472 transitions. [2020-10-13 05:21:56,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 05:21:56,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:56,110 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:56,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:21:56,110 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2132187116, now seen corresponding path program 9 times [2020-10-13 05:21:56,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:56,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662635819] [2020-10-13 05:21:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5995 [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:22:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-13 05:22:02,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:02,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:02,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:02,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:02,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:02,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:02,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:02,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662635819] [2020-10-13 05:22:02,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:02,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:22:02,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317720973] [2020-10-13 05:22:02,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:22:02,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:22:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:22:02,744 INFO L87 Difference]: Start difference. First operand 358 states and 472 transitions. Second operand 32 states. [2020-10-13 05:22:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:03,516 INFO L93 Difference]: Finished difference Result 600 states and 813 transitions. [2020-10-13 05:22:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:22:03,517 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-13 05:22:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:03,521 INFO L225 Difference]: With dead ends: 600 [2020-10-13 05:22:03,521 INFO L226 Difference]: Without dead ends: 583 [2020-10-13 05:22:03,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-10-13 05:22:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 370. [2020-10-13 05:22:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 05:22:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 488 transitions. [2020-10-13 05:22:03,540 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 488 transitions. Word has length 156 [2020-10-13 05:22:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:03,540 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 488 transitions. [2020-10-13 05:22:03,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:22:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 488 transitions. [2020-10-13 05:22:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 05:22:03,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:03,543 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:03,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:22:03,544 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash -868775116, now seen corresponding path program 10 times [2020-10-13 05:22:03,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:03,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543146101] [2020-10-13 05:22:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:03,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:04,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:11,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:11,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:22:11,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7679 [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-13 05:22:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:11,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:11,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:11,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:11,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:11,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543146101] [2020-10-13 05:22:11,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:11,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:22:11,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647622649] [2020-10-13 05:22:11,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:22:11,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:22:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:11,848 INFO L87 Difference]: Start difference. First operand 370 states and 488 transitions. Second operand 33 states. [2020-10-13 05:22:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:12,831 INFO L93 Difference]: Finished difference Result 619 states and 839 transitions. [2020-10-13 05:22:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:22:12,832 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2020-10-13 05:22:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:12,836 INFO L225 Difference]: With dead ends: 619 [2020-10-13 05:22:12,836 INFO L226 Difference]: Without dead ends: 602 [2020-10-13 05:22:12,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:22:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-13 05:22:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 382. [2020-10-13 05:22:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-13 05:22:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 504 transitions. [2020-10-13 05:22:12,856 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 504 transitions. Word has length 161 [2020-10-13 05:22:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:12,857 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 504 transitions. [2020-10-13 05:22:12,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:22:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 504 transitions. [2020-10-13 05:22:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 05:22:12,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:12,859 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:12,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:22:12,860 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash -678206228, now seen corresponding path program 11 times [2020-10-13 05:22:12,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:12,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792918454] [2020-10-13 05:22:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:12,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:14,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:17,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-13 05:22:17,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:18,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:18,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792918454] [2020-10-13 05:22:18,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:18,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:22:18,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358317769] [2020-10-13 05:22:18,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:22:18,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:22:18,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:22:18,538 INFO L87 Difference]: Start difference. First operand 382 states and 504 transitions. Second operand 34 states. [2020-10-13 05:22:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:19,447 INFO L93 Difference]: Finished difference Result 638 states and 865 transitions. [2020-10-13 05:22:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:22:19,448 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 166 [2020-10-13 05:22:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:19,452 INFO L225 Difference]: With dead ends: 638 [2020-10-13 05:22:19,452 INFO L226 Difference]: Without dead ends: 621 [2020-10-13 05:22:19,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-13 05:22:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 394. [2020-10-13 05:22:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-13 05:22:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-13 05:22:19,481 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 166 [2020-10-13 05:22:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:19,482 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-13 05:22:19,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:22:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-13 05:22:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 05:22:19,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:19,486 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:19,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:22:19,487 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 850583092, now seen corresponding path program 12 times [2020-10-13 05:22:19,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:19,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708479443] [2020-10-13 05:22:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:26,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6943 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-13 05:22:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:27,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:27,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:27,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:27,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:27,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:27,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708479443] [2020-10-13 05:22:27,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:27,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:22:27,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341347312] [2020-10-13 05:22:27,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:22:27,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:27,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:22:27,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:27,159 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 35 states. [2020-10-13 05:22:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:28,074 INFO L93 Difference]: Finished difference Result 657 states and 891 transitions. [2020-10-13 05:22:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:22:28,074 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 171 [2020-10-13 05:22:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:28,078 INFO L225 Difference]: With dead ends: 657 [2020-10-13 05:22:28,078 INFO L226 Difference]: Without dead ends: 640 [2020-10-13 05:22:28,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-13 05:22:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 406. [2020-10-13 05:22:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-13 05:22:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 536 transitions. [2020-10-13 05:22:28,097 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 536 transitions. Word has length 171 [2020-10-13 05:22:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:28,098 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 536 transitions. [2020-10-13 05:22:28,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:22:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 536 transitions. [2020-10-13 05:22:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 05:22:28,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:28,099 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:28,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:22:28,100 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash -399248916, now seen corresponding path program 13 times [2020-10-13 05:22:28,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:28,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83030533] [2020-10-13 05:22:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:28,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:33,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 05:22:33,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:33,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 05:22:33,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:22:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-13 05:22:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:33,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:33,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:33,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:33,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83030533] [2020-10-13 05:22:33,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:33,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:22:33,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365121585] [2020-10-13 05:22:33,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:22:33,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:22:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:33,911 INFO L87 Difference]: Start difference. First operand 406 states and 536 transitions. Second operand 36 states. [2020-10-13 05:22:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:35,031 INFO L93 Difference]: Finished difference Result 676 states and 917 transitions. [2020-10-13 05:22:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:22:35,032 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-10-13 05:22:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:35,034 INFO L225 Difference]: With dead ends: 676 [2020-10-13 05:22:35,035 INFO L226 Difference]: Without dead ends: 659 [2020-10-13 05:22:35,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-13 05:22:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 418. [2020-10-13 05:22:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-13 05:22:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 552 transitions. [2020-10-13 05:22:35,055 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 552 transitions. Word has length 176 [2020-10-13 05:22:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:35,055 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 552 transitions. [2020-10-13 05:22:35,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:22:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 552 transitions. [2020-10-13 05:22:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 05:22:35,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:35,057 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:35,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:22:35,057 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 560099636, now seen corresponding path program 14 times [2020-10-13 05:22:35,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:35,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358056450] [2020-10-13 05:22:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:40,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-13 05:22:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:40,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:40,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:40,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:40,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:40,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:40,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358056450] [2020-10-13 05:22:40,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:40,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:22:40,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697067623] [2020-10-13 05:22:40,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:22:40,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:22:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:40,858 INFO L87 Difference]: Start difference. First operand 418 states and 552 transitions. Second operand 37 states. [2020-10-13 05:22:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:41,827 INFO L93 Difference]: Finished difference Result 695 states and 943 transitions. [2020-10-13 05:22:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:22:41,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 181 [2020-10-13 05:22:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:41,830 INFO L225 Difference]: With dead ends: 695 [2020-10-13 05:22:41,830 INFO L226 Difference]: Without dead ends: 678 [2020-10-13 05:22:41,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:22:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-13 05:22:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 430. [2020-10-13 05:22:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-13 05:22:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 568 transitions. [2020-10-13 05:22:41,851 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 568 transitions. Word has length 181 [2020-10-13 05:22:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:41,852 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 568 transitions. [2020-10-13 05:22:41,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:22:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 568 transitions. [2020-10-13 05:22:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 05:22:41,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:41,854 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:41,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:22:41,854 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1488437524, now seen corresponding path program 15 times [2020-10-13 05:22:41,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:41,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877969919] [2020-10-13 05:22:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:41,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:46,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 05:22:46,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 05:22:46,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:22:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-13 05:22:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:47,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:47,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:47,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:47,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:22:47,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877969919] [2020-10-13 05:22:47,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:47,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:22:47,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819114708] [2020-10-13 05:22:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:22:47,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:22:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:22:47,740 INFO L87 Difference]: Start difference. First operand 430 states and 568 transitions. Second operand 38 states. [2020-10-13 05:22:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:49,078 INFO L93 Difference]: Finished difference Result 714 states and 969 transitions. [2020-10-13 05:22:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:22:49,079 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 186 [2020-10-13 05:22:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:49,081 INFO L225 Difference]: With dead ends: 714 [2020-10-13 05:22:49,082 INFO L226 Difference]: Without dead ends: 697 [2020-10-13 05:22:49,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:22:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-13 05:22:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 442. [2020-10-13 05:22:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-13 05:22:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 584 transitions. [2020-10-13 05:22:49,104 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 584 transitions. Word has length 186 [2020-10-13 05:22:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:49,104 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 584 transitions. [2020-10-13 05:22:49,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:22:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 584 transitions. [2020-10-13 05:22:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 05:22:49,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:49,106 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:49,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:22:49,107 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:49,107 INFO L82 PathProgramCache]: Analyzing trace with hash 334906420, now seen corresponding path program 16 times [2020-10-13 05:22:49,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:49,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495437838] [2020-10-13 05:22:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking...