/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:42:15,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:42:15,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:42:15,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:42:15,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:42:15,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:42:15,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:42:15,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:42:15,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:42:15,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:42:15,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:42:15,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:42:15,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:42:15,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:42:15,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:42:15,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:42:15,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:42:15,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:42:15,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:42:15,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:42:15,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:42:15,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:42:15,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:42:15,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:42:15,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:42:15,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:42:15,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:42:15,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:42:15,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:42:15,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:42:15,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:42:15,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:42:15,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:42:15,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:42:15,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:42:15,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:42:15,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:42:15,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:42:15,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:42:15,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:42:15,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:42:15,831 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 [2020-09-25 05:42:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:42:15,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:42:15,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:42:15,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:42:15,864 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:42:15,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:42:15,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:42:15,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:42:15,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:42:15,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:42:15,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:42:15,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:42:15,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:42:15,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:42:15,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:42:15,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:42:15,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:42:15,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:42:15,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:42:15,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:42:15,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:42:15,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:42:15,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:42:15,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:42:15,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:42:15,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:42:15,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:42:15,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:42:15,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:42:15,871 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:42:16,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:42:16,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:42:16,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:42:16,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:42:16,430 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:42:16,431 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 05:42:16,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a948992/8ce30ee9e9bb424ea37cd00512019ed9/FLAGba2bfc0b2 [2020-09-25 05:42:17,092 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:42:17,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 05:42:17,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a948992/8ce30ee9e9bb424ea37cd00512019ed9/FLAGba2bfc0b2 [2020-09-25 05:42:17,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a948992/8ce30ee9e9bb424ea37cd00512019ed9 [2020-09-25 05:42:17,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:42:17,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:42:17,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:42:17,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:42:17,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:42:17,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17, skipping insertion in model container [2020-09-25 05:42:17,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:42:17,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:42:17,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:42:17,736 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:42:17,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:42:17,782 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:42:17,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17 WrapperNode [2020-09-25 05:42:17,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:42:17,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:42:17,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:42:17,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:42:17,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:42:17,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:42:17,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:42:17,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:42:17,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (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 [2020-09-25 05:42:17,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:42:17,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:42:17,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:42:17,997 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 05:42:17,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:42:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:42:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:42:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 05:42:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 05:42:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 05:42:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 05:42:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:42:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:42:18,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:42:18,332 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 05:42:18,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:42:18 BoogieIcfgContainer [2020-09-25 05:42:18,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:42:18,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:42:18,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:42:18,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:42:18,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:42:17" (1/3) ... [2020-09-25 05:42:18,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748592e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:42:18, skipping insertion in model container [2020-09-25 05:42:18,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (2/3) ... [2020-09-25 05:42:18,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748592e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:42:18, skipping insertion in model container [2020-09-25 05:42:18,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:42:18" (3/3) ... [2020-09-25 05:42:18,348 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 05:42:18,360 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:42:18,370 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:42:18,412 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:42:18,448 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:42:18,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:42:18,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:42:18,449 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:42:18,449 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:42:18,449 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:42:18,449 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:42:18,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:42:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 05:42:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 05:42:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:18,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:18,483 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 05:42:18,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:18,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888272939] [2020-09-25 05:42:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:18,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:18,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:18,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:42:18,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-09-25 05:42:18,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:18,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 05:42:18,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:18,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 05:42:19,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:19,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:19,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:19,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:19,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 05:42:19,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:19,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:19,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:19,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:19,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:19,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:19,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:19,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:19,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 05:42:19,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:19,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:42:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:42:19,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888272939] [2020-09-25 05:42:19,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:19,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:42:19,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535253014] [2020-09-25 05:42:19,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:42:19,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:42:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:42:19,168 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 05:42:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:19,409 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 05:42:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:42:19,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 05:42:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:19,426 INFO L225 Difference]: With dead ends: 94 [2020-09-25 05:42:19,427 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 05:42:19,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:42:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 05:42:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 05:42:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 05:42:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 05:42:19,490 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 05:42:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:19,491 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 05:42:19,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:42:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 05:42:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 05:42:19,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:19,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:19,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:42:19,494 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-25 05:42:19,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:19,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777767911] [2020-09-25 05:42:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:19,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:42:19,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-09-25 05:42:19,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:19,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 05:42:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 05:42:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:19,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:19,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:19,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:19,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 05:42:19,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:19,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:19,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:19,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:19,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:19,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:19,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:20,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:20,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:20,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 05:42:20,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:20,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:42:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777767911] [2020-09-25 05:42:20,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:20,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:42:20,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249146267] [2020-09-25 05:42:20,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:42:20,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:20,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:42:20,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:42:20,013 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-25 05:42:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:20,189 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-25 05:42:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:42:20,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 05:42:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:20,193 INFO L225 Difference]: With dead ends: 83 [2020-09-25 05:42:20,193 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 05:42:20,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:42:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 05:42:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 05:42:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 05:42:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 05:42:20,211 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 05:42:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:20,211 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 05:42:20,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:42:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 05:42:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 05:42:20,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:20,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:20,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:42:20,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:20,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 05:42:20,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:20,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817333111] [2020-09-25 05:42:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:20,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 05:42:21,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:42:21,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-09-25 05:42:21,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:42:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 05:42:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 05:42:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:21,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 05:42:21,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:21,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:21,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 05:42:21,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:21,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:42:21,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817333111] [2020-09-25 05:42:21,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:21,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:42:21,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959294679] [2020-09-25 05:42:21,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:42:21,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:42:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:42:21,933 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-25 05:42:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:22,169 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-25 05:42:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:42:22,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-25 05:42:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:22,172 INFO L225 Difference]: With dead ends: 92 [2020-09-25 05:42:22,172 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 05:42:22,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:42:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 05:42:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-25 05:42:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 05:42:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-09-25 05:42:22,184 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2020-09-25 05:42:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:22,184 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-09-25 05:42:22,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:42:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-09-25 05:42:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 05:42:22,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:22,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:22,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:42:22,188 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1465690975, now seen corresponding path program 2 times [2020-09-25 05:42:22,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:22,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340040706] [2020-09-25 05:42:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:24,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:24,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 05:42:24,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 05:42:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2451 [2020-09-25 05:42:24,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:24,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:42:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:42:24,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:42:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:24,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:24,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:24,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:24,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:24,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:24,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 05:42:24,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:24,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:24,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:24,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:24,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:24,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:24,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:24,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:24,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:24,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:24,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 05:42:24,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:24,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:24,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:42:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 05:42:24,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:42:24,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 05:42:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340040706] [2020-09-25 05:42:24,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:24,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 05:42:24,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031803207] [2020-09-25 05:42:24,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:42:24,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:42:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:42:24,775 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 7 states. [2020-09-25 05:42:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:25,012 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-09-25 05:42:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:42:25,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-25 05:42:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:25,014 INFO L225 Difference]: With dead ends: 101 [2020-09-25 05:42:25,014 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 05:42:25,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 05:42:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 05:42:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-09-25 05:42:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 05:42:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 05:42:25,024 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2020-09-25 05:42:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:25,024 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 05:42:25,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:42:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 05:42:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 05:42:25,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:25,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:25,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:42:25,027 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -625919587, now seen corresponding path program 1 times [2020-09-25 05:42:25,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:25,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417519224] [2020-09-25 05:42:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:26,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:28,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:29,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:30,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 05:42:30,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 05:42:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 05:42:30,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:30,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:42:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 05:42:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 05:42:30,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:30,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:30,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:30,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 05:42:30,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:30,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:30,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:30,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:30,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 05:42:30,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:30,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-25 05:42:30,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:30,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:30,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:30,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:30,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:30,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 05:42:30,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417519224] [2020-09-25 05:42:30,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:30,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:42:30,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281780255] [2020-09-25 05:42:30,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:42:30,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:30,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:42:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:42:30,382 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 11 states. [2020-09-25 05:42:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:30,821 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-09-25 05:42:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 05:42:30,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-25 05:42:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:30,826 INFO L225 Difference]: With dead ends: 103 [2020-09-25 05:42:30,827 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 05:42:30,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-25 05:42:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 05:42:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2020-09-25 05:42:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 05:42:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-09-25 05:42:30,848 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 49 [2020-09-25 05:42:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:30,849 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-09-25 05:42:30,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:42:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-09-25 05:42:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 05:42:30,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:30,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:30,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:42:30,856 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash -352511652, now seen corresponding path program 1 times [2020-09-25 05:42:30,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:30,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102369920] [2020-09-25 05:42:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:30,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:34,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 05:42:34,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 05:42:34,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3412 [2020-09-25 05:42:34,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:34,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:34,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:34,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 05:42:34,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 05:42:34,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:34,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:34,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:42:34,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:34,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:34,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:34,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 05:42:34,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:34,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-25 05:42:34,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:34,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:34,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 05:42:34,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102369920] [2020-09-25 05:42:34,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:34,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:42:34,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951822439] [2020-09-25 05:42:34,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:42:34,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:42:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:42:34,470 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 5 states. [2020-09-25 05:42:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:34,629 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-09-25 05:42:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:42:34,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-09-25 05:42:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:34,630 INFO L225 Difference]: With dead ends: 120 [2020-09-25 05:42:34,630 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 05:42:34,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:42:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 05:42:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-09-25 05:42:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 05:42:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-09-25 05:42:34,646 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 50 [2020-09-25 05:42:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:34,647 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-09-25 05:42:34,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:42:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-09-25 05:42:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 05:42:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:34,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:34,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:42:34,654 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash -611427224, now seen corresponding path program 1 times [2020-09-25 05:42:34,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:34,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729506496] [2020-09-25 05:42:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:34,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:35,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:35,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:36,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:39,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:39,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 05:42:39,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:42:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 05:42:39,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:39,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 05:42:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 05:42:39,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:39,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:39,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:39,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:39,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:42:39,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:39,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:39,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:39,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:39,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:39,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:39,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 05:42:39,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 05:42:39,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:39,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 05:42:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:42:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 05:42:39,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729506496] [2020-09-25 05:42:39,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:39,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:42:39,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17299975] [2020-09-25 05:42:39,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:42:39,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:42:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:42:39,893 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 5 states. [2020-09-25 05:42:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:40,017 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-09-25 05:42:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:42:40,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-09-25 05:42:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:40,019 INFO L225 Difference]: With dead ends: 79 [2020-09-25 05:42:40,019 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 05:42:40,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:42:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 05:42:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-09-25 05:42:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 05:42:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 05:42:40,034 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-25 05:42:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:40,035 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 05:42:40,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:42:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 05:42:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 05:42:40,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:40,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:40,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:42:40,040 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1098861317, now seen corresponding path program 1 times [2020-09-25 05:42:40,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:40,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350122715] [2020-09-25 05:42:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:40,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:40,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:44,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:45,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:42:45,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:42:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 05:42:45,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:45,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:42:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:42:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 05:42:45,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:45,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:45,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:45,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:45,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:42:45,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:45,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:45,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:45,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:45,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:45,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:45,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:45,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 05:42:45,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-09-25 05:42:45,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:45,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:42:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:42:45,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 05:42:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:45,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:45,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:42:45,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:45,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:42:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 05:42:45,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350122715] [2020-09-25 05:42:45,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:45,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:42:45,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527566174] [2020-09-25 05:42:45,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:42:45,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:42:45,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:42:45,479 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 11 states. [2020-09-25 05:42:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:45,745 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-25 05:42:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:42:45,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-25 05:42:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:45,747 INFO L225 Difference]: With dead ends: 113 [2020-09-25 05:42:45,747 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 05:42:45,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:42:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 05:42:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-09-25 05:42:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 05:42:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 05:42:45,754 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 05:42:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:45,755 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 05:42:45,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:42:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 05:42:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 05:42:45,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:45,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:45,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:42:45,756 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 487876865, now seen corresponding path program 2 times [2020-09-25 05:42:45,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:45,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439818962] [2020-09-25 05:42:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:45,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:47,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:50,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:50,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:50,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 05:42:50,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:42:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 05:42:50,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:50,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:42:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:42:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 05:42:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:50,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:50,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:50,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:50,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:42:50,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:50,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:50,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:50,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:50,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:50,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:42:50,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-25 05:42:50,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:50,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:42:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 05:42:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 05:42:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:51,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 05:42:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:51,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:51,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:51,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:51,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:42:51,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:51,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:51,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:51,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:42:51,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:51,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 05:42:51,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439818962] [2020-09-25 05:42:51,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:51,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:42:51,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445534719] [2020-09-25 05:42:51,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:42:51,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:42:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:42:51,235 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 11 states. [2020-09-25 05:42:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:51,592 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2020-09-25 05:42:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:42:51,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-25 05:42:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:51,594 INFO L225 Difference]: With dead ends: 121 [2020-09-25 05:42:51,595 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 05:42:51,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-25 05:42:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 05:42:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-09-25 05:42:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 05:42:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 05:42:51,605 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 05:42:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:51,605 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 05:42:51,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:42:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 05:42:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 05:42:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:51,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:51,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 05:42:51,606 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1547835901, now seen corresponding path program 3 times [2020-09-25 05:42:51,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:51,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275514041] [2020-09-25 05:42:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:51,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:53,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:54,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:54,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:55,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:56,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 05:42:56,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 05:42:56,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 05:42:56,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:56,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:42:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 05:42:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:42:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:56,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:56,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:42:56,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:42:56,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:56,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:56,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:56,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:42:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:56,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:56,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:42:56,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:42:56,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 05:42:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:56,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:56,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:56,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:56,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:42:56,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:56,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:56,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:56,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:42:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 05:42:56,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275514041] [2020-09-25 05:42:56,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:56,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:42:56,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458425862] [2020-09-25 05:42:56,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:42:56,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:42:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:42:56,867 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 9 states. [2020-09-25 05:42:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:57,130 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-09-25 05:42:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 05:42:57,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-09-25 05:42:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:57,132 INFO L225 Difference]: With dead ends: 114 [2020-09-25 05:42:57,132 INFO L226 Difference]: Without dead ends: 91 [2020-09-25 05:42:57,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-25 05:42:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-25 05:42:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-09-25 05:42:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 05:42:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-09-25 05:42:57,139 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 73 [2020-09-25 05:42:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:57,139 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-09-25 05:42:57,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:42:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-09-25 05:42:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 05:42:57,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:57,141 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:57,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 05:42:57,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1959040612, now seen corresponding path program 4 times [2020-09-25 05:42:57,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:57,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888197819] [2020-09-25 05:42:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:57,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:57,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:57,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:58,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:02,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:02,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-25 05:43:02,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 05:43:02,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 05:43:02,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:02,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:02,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:43:02,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:43:02,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 05:43:02,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:02,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:02,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:02,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:43:02,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:02,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:43:02,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:02,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:02,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:02,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 05:43:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:02,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:02,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:43:02,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-25 05:43:02,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:02,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:43:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 05:43:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:43:02,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-25 05:43:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:02,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:02,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:43:02,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:02,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:43:02,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:02,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:02,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:02,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:43:02,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:02,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:43:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 05:43:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888197819] [2020-09-25 05:43:02,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:02,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 05:43:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007319584] [2020-09-25 05:43:02,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 05:43:02,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 05:43:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:43:02,532 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 13 states.