/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:39:13,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:39:13,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:39:13,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:39:13,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:39:13,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:39:13,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:39:13,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:39:13,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:39:13,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:39:13,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:39:13,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:39:13,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:39:13,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:39:13,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:39:13,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:39:13,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:39:13,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:39:13,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:39:13,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:39:13,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:39:13,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:39:13,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:39:13,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:39:13,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:39:13,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:39:13,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:39:13,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:39:13,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:39:13,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:39:13,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:39:13,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:39:13,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:39:13,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:39:13,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:39:13,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:39:13,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:39:13,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:39:13,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:39:13,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:39:13,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:39:13,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:39:13,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:39:13,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:39:13,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:39:13,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:39:13,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:39:13,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:39:13,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:39:13,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:39:13,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:39:13,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:39:13,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:39:13,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:39:13,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:39:13,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:39:13,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:39:13,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:39:13,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:39:13,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:39:13,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:39:13,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:39:13,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:39:13,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:39:13,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:39:13,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:39:13,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:39:14,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:39:14,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:39:14,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:39:14,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:39:14,101 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:39:14,102 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-12 09:39:14,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce8658fc/571a9258d35845728c3e72780a98cf71/FLAGea9a4e83e [2020-10-12 09:39:14,670 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:39:14,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum5.c [2020-10-12 09:39:14,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce8658fc/571a9258d35845728c3e72780a98cf71/FLAGea9a4e83e [2020-10-12 09:39:15,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce8658fc/571a9258d35845728c3e72780a98cf71 [2020-10-12 09:39:15,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:39:15,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:39:15,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:15,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:39:15,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:39:15,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e06715f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15, skipping insertion in model container [2020-10-12 09:39:15,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:39:15,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:39:15,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:15,358 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:39:15,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:39:15,491 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:39:15,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15 WrapperNode [2020-10-12 09:39:15,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:39:15,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:39:15,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:39:15,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:39:15,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... [2020-10-12 09:39:15,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:39:15,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:39:15,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:39:15,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:39:15,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:39:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:39:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:39:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:39:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:39:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:39:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:39:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:39:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:39:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:39:15,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:39:15,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:39:15,955 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:39:15,956 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-12 09:39:15,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:15 BoogieIcfgContainer [2020-10-12 09:39:15,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:39:15,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:39:15,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:39:15,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:39:15,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:39:15" (1/3) ... [2020-10-12 09:39:15,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313b58f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:15, skipping insertion in model container [2020-10-12 09:39:15,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:39:15" (2/3) ... [2020-10-12 09:39:15,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313b58f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:39:15, skipping insertion in model container [2020-10-12 09:39:15,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:39:15" (3/3) ... [2020-10-12 09:39:15,970 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2020-10-12 09:39:15,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:39:15,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:39:16,010 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:39:16,039 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:39:16,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:39:16,040 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:39:16,040 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:39:16,040 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:39:16,040 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:39:16,040 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:39:16,040 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:39:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-12 09:39:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:39:16,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:16,072 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] [2020-10-12 09:39:16,073 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1396756151, now seen corresponding path program 1 times [2020-10-12 09:39:16,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:16,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323959698] [2020-10-12 09:39:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:16,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:21,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:39:21,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:39:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:39:21,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:21,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:39:21,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:39:21,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:21,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:21,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:21,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:21,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:39:21,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:21,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:21,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:21,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:21,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323959698] [2020-10-12 09:39:21,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:39:21,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:39:21,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581839586] [2020-10-12 09:39:21,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:21,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:21,479 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 6 states. [2020-10-12 09:39:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:21,767 INFO L93 Difference]: Finished difference Result 123 states and 189 transitions. [2020-10-12 09:39:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:39:21,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-12 09:39:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:21,778 INFO L225 Difference]: With dead ends: 123 [2020-10-12 09:39:21,778 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 09:39:21,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 09:39:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 09:39:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:39:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2020-10-12 09:39:21,829 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2020-10-12 09:39:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:21,830 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2020-10-12 09:39:21,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2020-10-12 09:39:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:39:21,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:21,832 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] [2020-10-12 09:39:21,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:39:21,832 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1451794531, now seen corresponding path program 1 times [2020-10-12 09:39:21,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:21,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389496009] [2020-10-12 09:39:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:26,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:39:26,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 09:39:26,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:39:26,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:26,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:26,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:39:26,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:39:26,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:26,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:26,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:26,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:26,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:26,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:26,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:26,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:26,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:26,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:26,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:26,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:26,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389496009] [2020-10-12 09:39:26,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:26,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:39:26,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455343002] [2020-10-12 09:39:26,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:26,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:26,948 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 6 states. [2020-10-12 09:39:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:27,252 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2020-10-12 09:39:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:27,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-12 09:39:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:27,254 INFO L225 Difference]: With dead ends: 103 [2020-10-12 09:39:27,255 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:39:27,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:39:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:39:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 09:39:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:39:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-12 09:39:27,278 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 34 [2020-10-12 09:39:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:27,279 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-12 09:39:27,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-12 09:39:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:39:27,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:27,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:27,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:39:27,286 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1969821871, now seen corresponding path program 1 times [2020-10-12 09:39:27,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:27,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156683277] [2020-10-12 09:39:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:27,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:32,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:39:32,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:39:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:39:32,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:39:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:39:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:39:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:32,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:32,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:32,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:39:32,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:32,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:32,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 09:39:32,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156683277] [2020-10-12 09:39:32,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:32,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:39:32,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907927683] [2020-10-12 09:39:32,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:39:32,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:39:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:39:32,397 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 6 states. [2020-10-12 09:39:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:32,707 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2020-10-12 09:39:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:39:32,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-12 09:39:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:32,710 INFO L225 Difference]: With dead ends: 115 [2020-10-12 09:39:32,710 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:39:32,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:39:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:39:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 09:39:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 09:39:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-12 09:39:32,731 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 52 [2020-10-12 09:39:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:32,731 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-12 09:39:32,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:39:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-12 09:39:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:39:32,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:32,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1] [2020-10-12 09:39:32,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:39:32,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1750779267, now seen corresponding path program 2 times [2020-10-12 09:39:32,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:32,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621201061] [2020-10-12 09:39:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:32,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:34,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:37,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:38,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:38,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:39:38,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:39:38,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5335 [2020-10-12 09:39:38,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:38,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:39:38,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:39:38,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 09:39:38,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:40,162 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-10-12 09:39:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:42,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:42,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:42,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:39:42,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:39:42,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621201061] [2020-10-12 09:39:42,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:42,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:39:42,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162599500] [2020-10-12 09:39:42,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:39:42,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:39:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:39:42,445 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 44 states. [2020-10-12 09:39:43,313 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-12 09:39:43,895 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-12 09:39:44,929 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-12 09:39:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:46,740 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2020-10-12 09:39:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:39:46,741 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 72 [2020-10-12 09:39:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:46,743 INFO L225 Difference]: With dead ends: 153 [2020-10-12 09:39:46,743 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 09:39:46,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=377, Invalid=3163, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 09:39:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 09:39:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2020-10-12 09:39:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 09:39:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2020-10-12 09:39:46,776 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 72 [2020-10-12 09:39:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:46,777 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2020-10-12 09:39:46,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:39:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2020-10-12 09:39:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:39:46,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:46,779 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2020-10-12 09:39:46,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:39:46,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1929023163, now seen corresponding path program 3 times [2020-10-12 09:39:46,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:46,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299721070] [2020-10-12 09:39:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:51,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:51,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:39:51,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:39:51,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:39:51,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:51,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:39:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:51,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:51,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:51,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:51,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:39:51,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299721070] [2020-10-12 09:39:51,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:51,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:51,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239147822] [2020-10-12 09:39:51,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:51,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:51,887 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand 10 states. [2020-10-12 09:39:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:52,468 INFO L93 Difference]: Finished difference Result 313 states and 366 transitions. [2020-10-12 09:39:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:39:52,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 09:39:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:52,471 INFO L225 Difference]: With dead ends: 313 [2020-10-12 09:39:52,471 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 09:39:52,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:39:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 09:39:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2020-10-12 09:39:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 09:39:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2020-10-12 09:39:52,492 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 74 [2020-10-12 09:39:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:52,492 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2020-10-12 09:39:52,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2020-10-12 09:39:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:39:52,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:52,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2020-10-12 09:39:52,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:39:52,495 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 283852667, now seen corresponding path program 4 times [2020-10-12 09:39:52,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:52,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981263834] [2020-10-12 09:39:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:39:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:39:57,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:57,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:39:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:57,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:39:57,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:39:57,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:39:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:39:57,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:39:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:39:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:39:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:39:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:39:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-12 09:39:57,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981263834] [2020-10-12 09:39:57,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:39:57,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:39:57,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806135108] [2020-10-12 09:39:57,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:39:57,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:39:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:39:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:39:57,619 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand 10 states. [2020-10-12 09:39:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:39:58,139 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2020-10-12 09:39:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:39:58,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 09:39:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:39:58,140 INFO L225 Difference]: With dead ends: 147 [2020-10-12 09:39:58,141 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:39:58,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:39:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:39:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 09:39:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 09:39:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-12 09:39:58,164 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 74 [2020-10-12 09:39:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:39:58,165 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-12 09:39:58,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:39:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-12 09:39:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:39:58,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:39:58,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:39:58,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:39:58,172 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:39:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:39:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash -996610135, now seen corresponding path program 5 times [2020-10-12 09:39:58,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:39:58,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314579727] [2020-10-12 09:39:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:39:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:39:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:58,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:39:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:02,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:03,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:03,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:40:03,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:40:03,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5451 [2020-10-12 09:40:03,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:03,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 09:40:03,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:40:03,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 09:40:03,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:07,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:07,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:07,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:07,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:07,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:07,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:07,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:07,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:07,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314579727] [2020-10-12 09:40:07,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:07,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 09:40:07,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504190917] [2020-10-12 09:40:07,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 09:40:07,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 09:40:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2632, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:40:07,397 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 54 states. [2020-10-12 09:40:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:11,951 INFO L93 Difference]: Finished difference Result 190 states and 213 transitions. [2020-10-12 09:40:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:40:11,952 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 92 [2020-10-12 09:40:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:11,954 INFO L225 Difference]: With dead ends: 190 [2020-10-12 09:40:11,955 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 09:40:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=363, Invalid=4329, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 09:40:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 09:40:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2020-10-12 09:40:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 09:40:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 194 transitions. [2020-10-12 09:40:11,972 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 194 transitions. Word has length 92 [2020-10-12 09:40:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:11,972 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 194 transitions. [2020-10-12 09:40:11,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 09:40:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 194 transitions. [2020-10-12 09:40:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:40:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:11,974 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:11,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:40:11,974 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1441093863, now seen corresponding path program 6 times [2020-10-12 09:40:11,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:11,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716400203] [2020-10-12 09:40:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:12,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:13,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:16,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:16,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:40:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:17,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:17,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:17,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:17,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:40:17,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716400203] [2020-10-12 09:40:17,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:17,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:40:17,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858794220] [2020-10-12 09:40:17,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:40:17,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:17,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:40:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:40:17,103 INFO L87 Difference]: Start difference. First operand 171 states and 194 transitions. Second operand 12 states. [2020-10-12 09:40:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:17,879 INFO L93 Difference]: Finished difference Result 395 states and 448 transitions. [2020-10-12 09:40:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:40:17,881 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2020-10-12 09:40:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:17,882 INFO L225 Difference]: With dead ends: 395 [2020-10-12 09:40:17,883 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 09:40:17,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:40:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 09:40:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2020-10-12 09:40:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 09:40:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2020-10-12 09:40:17,910 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 94 [2020-10-12 09:40:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:17,911 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2020-10-12 09:40:17,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:40:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2020-10-12 09:40:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:40:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:17,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:17,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:40:17,913 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1032287833, now seen corresponding path program 7 times [2020-10-12 09:40:17,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:17,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100269145] [2020-10-12 09:40:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:22,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:40:22,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:23,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:23,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:23,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:23,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:23,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:23,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:23,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:23,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:23,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-12 09:40:23,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100269145] [2020-10-12 09:40:23,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:23,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:40:23,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170251273] [2020-10-12 09:40:23,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:40:23,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:40:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:40:23,035 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand 12 states. [2020-10-12 09:40:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:23,807 INFO L93 Difference]: Finished difference Result 183 states and 201 transitions. [2020-10-12 09:40:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:23,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2020-10-12 09:40:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:23,810 INFO L225 Difference]: With dead ends: 183 [2020-10-12 09:40:23,810 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:40:23,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:40:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:40:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-12 09:40:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 09:40:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-12 09:40:23,819 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 94 [2020-10-12 09:40:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:23,819 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-12 09:40:23,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:40:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-12 09:40:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 09:40:23,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:23,820 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:40:23,821 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash 122750677, now seen corresponding path program 8 times [2020-10-12 09:40:23,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079857650] [2020-10-12 09:40:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:28,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-12 09:40:28,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:40:28,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 09:40:28,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:34,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:34,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:34,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:34,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:34,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:40:34,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079857650] [2020-10-12 09:40:34,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:34,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:40:34,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320160076] [2020-10-12 09:40:34,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:40:34,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:34,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:40:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2233, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:40:34,587 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 49 states. [2020-10-12 09:40:37,481 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 09:40:38,145 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-12 09:40:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:42,095 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2020-10-12 09:40:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:40:42,096 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 112 [2020-10-12 09:40:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:42,099 INFO L225 Difference]: With dead ends: 221 [2020-10-12 09:40:42,100 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 09:40:42,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 11 SyntacticMatches, 31 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=296, Invalid=5254, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 09:40:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 09:40:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 199. [2020-10-12 09:40:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 09:40:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2020-10-12 09:40:42,118 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 112 [2020-10-12 09:40:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:42,118 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2020-10-12 09:40:42,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:40:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2020-10-12 09:40:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 09:40:42,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:42,120 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:42,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:40:42,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash -521140973, now seen corresponding path program 9 times [2020-10-12 09:40:42,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:42,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896497281] [2020-10-12 09:40:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:42,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:40:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:47,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:47,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:47,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:47,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:47,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:47,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-12 09:40:47,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896497281] [2020-10-12 09:40:47,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:47,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:40:47,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565736444] [2020-10-12 09:40:47,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:40:47,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:40:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:40:47,286 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand 14 states. [2020-10-12 09:40:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:49,065 INFO L93 Difference]: Finished difference Result 309 states and 344 transitions. [2020-10-12 09:40:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:40:49,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 114 [2020-10-12 09:40:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:49,074 INFO L225 Difference]: With dead ends: 309 [2020-10-12 09:40:49,075 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 09:40:49,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:40:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 09:40:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 205. [2020-10-12 09:40:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 09:40:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 223 transitions. [2020-10-12 09:40:49,092 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 223 transitions. Word has length 114 [2020-10-12 09:40:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:49,093 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 223 transitions. [2020-10-12 09:40:49,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:40:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 223 transitions. [2020-10-12 09:40:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 09:40:49,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:49,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:49,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:40:49,095 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1278528621, now seen corresponding path program 10 times [2020-10-12 09:40:49,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:49,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566599817] [2020-10-12 09:40:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:54,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:54,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 09:40:54,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:54,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:40:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:54,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:40:54,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:40:54,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:40:54,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:40:54,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:40:54,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:40:54,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:40:54,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:40:54,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:40:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-12 09:40:54,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566599817] [2020-10-12 09:40:54,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:40:54,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:40:54,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468475001] [2020-10-12 09:40:54,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:40:54,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:40:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:40:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:40:54,271 INFO L87 Difference]: Start difference. First operand 205 states and 223 transitions. Second operand 14 states. [2020-10-12 09:40:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:40:55,262 INFO L93 Difference]: Finished difference Result 337 states and 364 transitions. [2020-10-12 09:40:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:40:55,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 114 [2020-10-12 09:40:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:40:55,265 INFO L225 Difference]: With dead ends: 337 [2020-10-12 09:40:55,265 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 09:40:55,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:40:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 09:40:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2020-10-12 09:40:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 09:40:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-10-12 09:40:55,274 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 114 [2020-10-12 09:40:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:40:55,275 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-10-12 09:40:55,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:40:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-10-12 09:40:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 09:40:55,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:40:55,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:40:55,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:40:55,276 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:40:55,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:40:55,276 INFO L82 PathProgramCache]: Analyzing trace with hash -349405183, now seen corresponding path program 11 times [2020-10-12 09:40:55,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:40:55,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466163784] [2020-10-12 09:40:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:40:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:40:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:40:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:04,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:04,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 09:41:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:41:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9456 [2020-10-12 09:41:04,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 108 [2020-10-12 09:41:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:41:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-12 09:41:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:08,213 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-10-12 09:41:08,595 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-12 09:41:08,982 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-12 09:41:09,392 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-12 09:41:09,602 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-12 09:41:13,318 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-12 09:41:18,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:18,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:18,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:18,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:41:19,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466163784] [2020-10-12 09:41:19,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:19,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 09:41:19,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260045010] [2020-10-12 09:41:19,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 09:41:19,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 09:41:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=6059, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 09:41:19,055 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 81 states. [2020-10-12 09:41:21,980 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 45 [2020-10-12 09:41:23,623 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 100 [2020-10-12 09:41:24,231 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-12 09:41:24,617 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 09:41:25,029 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-12 09:41:25,651 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 22 [2020-10-12 09:41:26,374 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 25 [2020-10-12 09:41:26,744 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 26 [2020-10-12 09:41:27,135 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 29 [2020-10-12 09:41:27,500 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 28 [2020-10-12 09:41:28,236 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 30 [2020-10-12 09:41:28,987 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-10-12 09:41:29,551 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-12 09:41:30,143 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-12 09:41:30,625 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-12 09:41:31,050 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-12 09:41:31,527 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-12 09:41:31,957 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 09:41:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:41,830 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2020-10-12 09:41:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 09:41:41,831 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 132 [2020-10-12 09:41:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:41,839 INFO L225 Difference]: With dead ends: 287 [2020-10-12 09:41:41,839 INFO L226 Difference]: Without dead ends: 282 [2020-10-12 09:41:41,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 8 SyntacticMatches, 24 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=944, Invalid=11712, Unknown=0, NotChecked=0, Total=12656 [2020-10-12 09:41:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-12 09:41:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 267. [2020-10-12 09:41:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-12 09:41:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 302 transitions. [2020-10-12 09:41:41,877 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 302 transitions. Word has length 132 [2020-10-12 09:41:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:41,877 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 302 transitions. [2020-10-12 09:41:41,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 09:41:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 302 transitions. [2020-10-12 09:41:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 09:41:41,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:41,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:41,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:41:41,880 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -88501441, now seen corresponding path program 12 times [2020-10-12 09:41:41,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:41,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508496400] [2020-10-12 09:41:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:41,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:41,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:42,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:46,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:46,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 09:41:46,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:41:46,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:41:46,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:41:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-12 09:41:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:41:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:47,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-12 09:41:47,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508496400] [2020-10-12 09:41:47,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:47,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:41:47,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693108071] [2020-10-12 09:41:47,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:41:47,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:41:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:41:47,162 INFO L87 Difference]: Start difference. First operand 267 states and 302 transitions. Second operand 16 states. [2020-10-12 09:41:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:50,284 INFO L93 Difference]: Finished difference Result 530 states and 601 transitions. [2020-10-12 09:41:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:41:50,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 134 [2020-10-12 09:41:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:50,290 INFO L225 Difference]: With dead ends: 530 [2020-10-12 09:41:50,291 INFO L226 Difference]: Without dead ends: 342 [2020-10-12 09:41:50,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:41:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-12 09:41:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 239. [2020-10-12 09:41:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-12 09:41:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 257 transitions. [2020-10-12 09:41:50,319 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 257 transitions. Word has length 134 [2020-10-12 09:41:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:50,320 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 257 transitions. [2020-10-12 09:41:50,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:41:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 257 transitions. [2020-10-12 09:41:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 09:41:50,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:50,322 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:50,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:41:50,322 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash 246223295, now seen corresponding path program 13 times [2020-10-12 09:41:50,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:50,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969685596] [2020-10-12 09:41:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:55,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:55,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:41:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:55,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:41:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:55,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:41:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:41:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:41:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:41:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:41:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-12 09:41:55,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969685596] [2020-10-12 09:41:55,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:41:55,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:41:55,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712464115] [2020-10-12 09:41:55,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:41:55,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:41:55,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:41:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:41:55,728 INFO L87 Difference]: Start difference. First operand 239 states and 257 transitions. Second operand 16 states. [2020-10-12 09:41:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:41:57,581 INFO L93 Difference]: Finished difference Result 391 states and 418 transitions. [2020-10-12 09:41:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:41:57,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 134 [2020-10-12 09:41:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:41:57,584 INFO L225 Difference]: With dead ends: 391 [2020-10-12 09:41:57,584 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:41:57,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:41:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:41:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 154. [2020-10-12 09:41:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 09:41:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-10-12 09:41:57,604 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 134 [2020-10-12 09:41:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:41:57,604 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-10-12 09:41:57,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:41:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-10-12 09:41:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 09:41:57,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:41:57,607 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:41:57,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:41:57,607 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:41:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:41:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 285891373, now seen corresponding path program 14 times [2020-10-12 09:41:57,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:41:57,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994267818] [2020-10-12 09:41:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:41:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:41:57,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:41:57,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:03,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:03,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 09:42:03,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:42:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6337 [2020-10-12 09:42:03,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 127 [2020-10-12 09:42:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:42:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-12 09:42:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:05,915 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-12 09:42:06,174 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-12 09:42:06,762 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-12 09:42:06,963 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-12 09:42:07,164 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-12 09:42:07,391 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-12 09:42:07,695 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-12 09:42:07,954 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-12 09:42:08,200 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-12 09:42:08,439 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 09:42:08,721 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-12 09:42:09,373 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-12 09:42:09,711 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 09:42:10,062 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 09:42:10,438 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 09:42:10,824 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-12 09:42:11,220 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-12 09:42:11,585 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 09:42:11,977 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 09:42:12,348 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-12 09:42:12,747 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 09:42:13,105 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-12 09:42:14,225 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-10-12 09:42:15,011 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-10-12 09:42:15,864 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-12 09:42:16,644 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2020-10-12 09:42:17,447 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2020-10-12 09:42:18,211 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2020-10-12 09:42:18,892 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-10-12 09:42:19,699 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 36 [2020-10-12 09:42:20,374 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-10-12 09:42:21,048 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-12 09:42:21,734 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2020-10-12 09:42:22,396 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-12 09:42:23,209 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2020-10-12 09:42:24,023 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-12 09:42:24,759 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-12 09:42:25,653 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-12 09:42:26,507 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-12 09:42:27,282 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 09:42:28,045 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-12 09:42:28,858 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-12 09:42:29,516 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-12 09:42:30,252 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-10-12 09:42:30,833 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-12 09:42:31,400 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-12 09:42:31,954 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-12 09:42:32,660 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-12 09:42:33,042 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-10-12 09:42:33,423 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-10-12 09:42:33,788 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-10-12 09:42:34,273 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-10-12 09:42:34,725 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-12 09:42:35,213 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-10-12 09:42:35,707 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-12 09:42:36,150 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-12 09:42:36,588 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-10-12 09:42:37,565 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-12 09:42:37,983 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-12 09:42:38,394 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 09:42:39,168 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-12 09:42:39,597 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-12 09:42:40,131 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-12 09:42:49,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:42:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:42:49,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:42:49,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:42:49,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:42:49,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:42:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:42:49,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:42:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:42:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:42:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:42:49,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:42:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 25 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:42:49,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994267818] [2020-10-12 09:42:49,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:42:49,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2020-10-12 09:42:49,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495662272] [2020-10-12 09:42:49,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-10-12 09:42:49,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:42:49,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-10-12 09:42:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=10840, Unknown=0, NotChecked=0, Total=11342 [2020-10-12 09:42:49,683 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 107 states. [2020-10-12 09:42:50,730 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 18 [2020-10-12 09:42:52,419 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-12 09:42:53,680 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-12 09:42:54,961 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-12 09:42:56,379 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77