/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-fpi/ms4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:35,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:35,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:35,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:35,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:35,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:35,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:35,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:35,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:35,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:35,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:35,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:35,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:35,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:35,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:35,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:35,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:35,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:35,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:35,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:35,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:35,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:35,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:35,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:35,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:35,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:35,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:35,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:35,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:35,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:35,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:35,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:35,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:35,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:35,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:35,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:35,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:35,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:35,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:35,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:35,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:35,782 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 10:11:35,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:35,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:35,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:35,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:35,832 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:35,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:35,833 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:35,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:35,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:35,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:35,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:35,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:35,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:35,834 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:35,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:35,835 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:35,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:35,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:35,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:35,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:35,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:35,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:35,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:35,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:35,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:35,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:35,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:35,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:35,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:35,841 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 10:11:36,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:36,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:36,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:36,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:36,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:36,218 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms4.c [2020-10-12 10:11:36,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b518cd8d/73e80eb5239b4d2f8eaf73f18c1617a5/FLAGf16c565ff [2020-10-12 10:11:36,785 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:36,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms4.c [2020-10-12 10:11:36,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b518cd8d/73e80eb5239b4d2f8eaf73f18c1617a5/FLAGf16c565ff [2020-10-12 10:11:37,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b518cd8d/73e80eb5239b4d2f8eaf73f18c1617a5 [2020-10-12 10:11:37,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:37,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:37,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:37,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:37,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:37,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1aa6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37, skipping insertion in model container [2020-10-12 10:11:37,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:37,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:37,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:37,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:37,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:37,538 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:37,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37 WrapperNode [2020-10-12 10:11:37,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:37,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:37,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:37,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:37,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (1/1) ... [2020-10-12 10:11:37,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:37,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:37,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:37,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:37,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (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 10:11:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:38,055 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:38,056 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:11:38,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:38 BoogieIcfgContainer [2020-10-12 10:11:38,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:38,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:38,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:38,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:38,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:37" (1/3) ... [2020-10-12 10:11:38,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f815c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:38, skipping insertion in model container [2020-10-12 10:11:38,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:37" (2/3) ... [2020-10-12 10:11:38,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f815c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:38, skipping insertion in model container [2020-10-12 10:11:38,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:38" (3/3) ... [2020-10-12 10:11:38,070 INFO L109 eAbstractionObserver]: Analyzing ICFG ms4.c [2020-10-12 10:11:38,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:38,091 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:38,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:38,157 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:38,157 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:38,158 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:38,158 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:38,158 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:38,158 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:38,159 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:38,159 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-12 10:11:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:11:38,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:38,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:38,191 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-12 10:11:38,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:38,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350363017] [2020-10-12 10:11:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:38,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:38,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:38,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:11:38,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:38,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-12 10:11:38,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:11:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:11:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:11:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:39,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:39,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:39,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:11:39,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:39,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:39,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:39,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:11:39,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:39,071 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 10:11:39,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350363017] [2020-10-12 10:11:39,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:39,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:11:39,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174879635] [2020-10-12 10:11:39,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:11:39,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:11:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:11:39,103 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-12 10:11:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:39,296 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-10-12 10:11:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:11:39,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 10:11:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:39,309 INFO L225 Difference]: With dead ends: 63 [2020-10-12 10:11:39,309 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 10:11:39,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:11:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 10:11:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-12 10:11:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:11:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 10:11:39,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-12 10:11:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:39,365 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 10:11:39,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:11:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 10:11:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:11:39,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:39,367 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] [2020-10-12 10:11:39,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:39,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:39,368 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-12 10:11:39,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:39,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286279073] [2020-10-12 10:11:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:39,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:39,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:39,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:11:39,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:11:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-12 10:11:39,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:11:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:11:39,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:40,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:40,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:40,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:11:40,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:40,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:40,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:40,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:40,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:11:40,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:40,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:40,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:40,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:40,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286279073] [2020-10-12 10:11:40,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:40,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:11:40,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793970209] [2020-10-12 10:11:40,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:11:40,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:11:40,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:11:40,058 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-12 10:11:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:40,361 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-12 10:11:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:11:40,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 10:11:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:40,363 INFO L225 Difference]: With dead ends: 38 [2020-10-12 10:11:40,363 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 10:11:40,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 10:11:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 10:11:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:11:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 10:11:40,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-12 10:11:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:40,373 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 10:11:40,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:11:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 10:11:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:40,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:40,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:40,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:11:40,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:40,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1827351009, now seen corresponding path program 1 times [2020-10-12 10:11:40,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:40,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781088745] [2020-10-12 10:11:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:40,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:41,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:42,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:42,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:11:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1832 [2020-10-12 10:11:42,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:11:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:11:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:11:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:42,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:42,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:42,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:11:42,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:42,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:42,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:42,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:42,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:42,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:42,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:42,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:42,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:42,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:42,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:42,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:42,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781088745] [2020-10-12 10:11:42,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:42,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:11:42,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23471712] [2020-10-12 10:11:42,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:11:42,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:11:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:11:42,741 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2020-10-12 10:11:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:43,258 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-12 10:11:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:11:43,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 10:11:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:43,260 INFO L225 Difference]: With dead ends: 41 [2020-10-12 10:11:43,260 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 10:11:43,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:11:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 10:11:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-12 10:11:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:11:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 10:11:43,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-10-12 10:11:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:43,268 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 10:11:43,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:11:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 10:11:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:11:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:43,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:43,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:11:43,271 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash 963777163, now seen corresponding path program 2 times [2020-10-12 10:11:43,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:43,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262308739] [2020-10-12 10:11:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:43,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:44,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:11:47,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:11:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4120 [2020-10-12 10:11:47,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:11:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:11:47,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:47,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:47,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:47,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:47,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:47,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:47,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:47,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:47,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:47,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:47,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:47,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:11:47,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262308739] [2020-10-12 10:11:47,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:47,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:11:47,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108324168] [2020-10-12 10:11:47,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:11:47,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:47,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:11:47,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:47,614 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 12 states. [2020-10-12 10:11:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:47,917 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-12 10:11:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:11:47,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 10:11:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:47,919 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:11:47,920 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:11:47,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:11:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:11:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-12 10:11:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:11:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-12 10:11:47,938 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2020-10-12 10:11:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:47,939 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-12 10:11:47,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:11:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-12 10:11:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:11:47,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:47,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:47,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:11:47,944 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 3 times [2020-10-12 10:11:47,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:47,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340886114] [2020-10-12 10:11:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:51,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:51,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:11:51,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:11:51,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3415 [2020-10-12 10:11:51,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:51,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:11:51,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:11:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:11:51,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:11:51,777 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-10-12 10:11:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:52,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:11:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:52,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:52,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:52,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:52,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:52,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:11:52,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:11:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:52,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340886114] [2020-10-12 10:11:52,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:11:52,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:11:52,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729001030] [2020-10-12 10:11:52,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:11:52,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:11:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:11:52,700 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 19 states. [2020-10-12 10:11:53,529 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-12 10:11:53,796 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-12 10:11:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:54,991 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-12 10:11:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:11:54,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-12 10:11:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:54,993 INFO L225 Difference]: With dead ends: 47 [2020-10-12 10:11:54,994 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:11:54,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:11:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:11:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-12 10:11:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:11:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 10:11:55,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2020-10-12 10:11:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:55,013 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 10:11:55,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:11:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 10:11:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:11:55,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:55,016 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:55,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:11:55,017 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1738820895, now seen corresponding path program 4 times [2020-10-12 10:11:55,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:55,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532320946] [2020-10-12 10:11:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:59,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:59,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:11:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:11:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4499 [2020-10-12 10:11:59,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:11:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:11:59,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:11:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:00,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:00,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:00,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 10:12:00,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532320946] [2020-10-12 10:12:00,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:00,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:12:00,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223767277] [2020-10-12 10:12:00,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:12:00,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:12:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:12:00,227 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 16 states. [2020-10-12 10:12:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:00,846 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-10-12 10:12:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:12:00,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 10:12:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:00,852 INFO L225 Difference]: With dead ends: 84 [2020-10-12 10:12:00,852 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 10:12:00,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:12:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 10:12:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-12 10:12:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:12:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-12 10:12:00,875 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 37 [2020-10-12 10:12:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:00,876 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-12 10:12:00,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:12:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-12 10:12:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:00,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:00,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:00,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:12:00,879 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:00,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081823, now seen corresponding path program 5 times [2020-10-12 10:12:00,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:00,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988947022] [2020-10-12 10:12:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:00,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:05,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:05,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:12:05,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:12:05,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:12:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:12:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:06,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:06,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:06,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:06,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:06,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:06,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:06,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:06,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:06,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:06,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:06,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:06,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:06,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:12:06,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988947022] [2020-10-12 10:12:06,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:06,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:12:06,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15363936] [2020-10-12 10:12:06,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:12:06,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:12:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:12:06,119 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 15 states. [2020-10-12 10:12:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:06,544 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-12 10:12:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:12:06,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 10:12:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:06,547 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:12:06,550 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:12:06,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:12:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:12:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-12 10:12:06,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:12:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-12 10:12:06,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2020-10-12 10:12:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:06,579 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-12 10:12:06,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:12:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-12 10:12:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:06,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:06,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:06,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:06,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash -932931423, now seen corresponding path program 6 times [2020-10-12 10:12:06,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:06,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096512988] [2020-10-12 10:12:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:11,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:12:11,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:11,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:12:11,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:11,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:12:11,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:12,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:12,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:12,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:12,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:12,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:12,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:12,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:12,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:12,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:12,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:12,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:12,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:12,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 10:12:12,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096512988] [2020-10-12 10:12:12,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:12,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:12:12,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407890533] [2020-10-12 10:12:12,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:12:12,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:12:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:12:12,056 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 17 states. [2020-10-12 10:12:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:12,927 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 10:12:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:12:12,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 10:12:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:12,929 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:12:12,929 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:12:12,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:12:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:12:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 10:12:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:12:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-12 10:12:12,937 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 39 [2020-10-12 10:12:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:12,938 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-12 10:12:12,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:12:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-12 10:12:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:12,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:12,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 10:12:12,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:12,939 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 7 times [2020-10-12 10:12:12,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:12,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440071235] [2020-10-12 10:12:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:16,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3630 [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:12:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:12:16,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:17,263 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-12 10:12:17,663 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 10:12:17,817 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 10:12:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:18,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:18,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:18,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:18,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:18,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:18,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:18,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:18,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440071235] [2020-10-12 10:12:18,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:18,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:12:18,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466856726] [2020-10-12 10:12:18,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:12:18,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:18,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:12:18,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:12:18,532 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 23 states. [2020-10-12 10:12:21,339 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-12 10:12:22,265 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 114 [2020-10-12 10:12:22,932 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-12 10:12:23,621 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-12 10:12:23,883 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 10:12:24,214 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-12 10:12:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:24,264 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-12 10:12:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:12:24,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-12 10:12:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:24,266 INFO L225 Difference]: With dead ends: 49 [2020-10-12 10:12:24,266 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 10:12:24,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=215, Invalid=1506, Unknown=1, NotChecked=0, Total=1722 [2020-10-12 10:12:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 10:12:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 10:12:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:12:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-12 10:12:24,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2020-10-12 10:12:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:24,284 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-12 10:12:24,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:12:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-12 10:12:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:12:24,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:24,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:24,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:24,287 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -370557945, now seen corresponding path program 8 times [2020-10-12 10:12:24,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:24,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100156909] [2020-10-12 10:12:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:12:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:12:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:29,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:29,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:29,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:12:29,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100156909] [2020-10-12 10:12:29,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:29,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:12:29,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693684849] [2020-10-12 10:12:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:12:29,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:29,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:12:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:12:29,597 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-12 10:12:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:30,172 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-12 10:12:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:12:30,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 10:12:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:30,174 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:12:30,174 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 10:12:30,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:12:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 10:12:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 10:12:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:12:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-12 10:12:30,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-12 10:12:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:30,183 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-12 10:12:30,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:12:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-12 10:12:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:12:30,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:30,184 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-12 10:12:30,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:30,185 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 9 times [2020-10-12 10:12:30,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:30,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474356061] [2020-10-12 10:12:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:34,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:34,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:12:34,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:12:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3824 [2020-10-12 10:12:34,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:12:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:12:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:34,504 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-12 10:12:34,644 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2020-10-12 10:12:34,833 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2020-10-12 10:12:35,040 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 57 [2020-10-12 10:12:35,192 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-12 10:12:35,659 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-10-12 10:12:35,977 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2020-10-12 10:12:36,245 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-12 10:12:36,521 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2020-10-12 10:12:36,748 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-12 10:12:36,992 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-12 10:12:37,179 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-12 10:12:37,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:37,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:37,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:37,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:37,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:37,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:37,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474356061] [2020-10-12 10:12:37,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:37,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:12:37,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164593568] [2020-10-12 10:12:37,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:12:37,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:12:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:12:37,960 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states. [2020-10-12 10:12:38,599 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2020-10-12 10:12:39,118 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 107 [2020-10-12 10:12:39,440 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 10:12:44,233 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 273 DAG size of output: 264 [2020-10-12 10:12:44,814 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2020-10-12 10:12:45,369 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2020-10-12 10:12:45,912 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-12 10:12:46,476 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-12 10:12:46,900 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 10:12:47,226 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 10:12:48,748 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 171 DAG size of output: 164 [2020-10-12 10:12:50,192 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 173 DAG size of output: 166 [2020-10-12 10:12:51,755 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 170 DAG size of output: 163 [2020-10-12 10:12:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:51,844 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-12 10:12:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:12:51,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-12 10:12:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:51,846 INFO L225 Difference]: With dead ends: 54 [2020-10-12 10:12:51,846 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 10:12:51,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:12:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 10:12:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 10:12:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 10:12:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-12 10:12:51,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-10-12 10:12:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:51,858 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-12 10:12:51,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:12:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-12 10:12:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 10:12:51,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:51,859 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:51,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:12:51,860 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -492425947, now seen corresponding path program 10 times [2020-10-12 10:12:51,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:51,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250002588] [2020-10-12 10:12:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:56,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 10:12:56,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 10:12:56,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:12:56,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:12:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:12:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:57,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:57,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:57,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:57,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:57,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:57,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:57,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:57,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:57,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:57,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:12:57,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250002588] [2020-10-12 10:12:57,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:57,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:12:57,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183377947] [2020-10-12 10:12:57,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:12:57,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:12:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:12:57,318 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 20 states. [2020-10-12 10:12:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:58,415 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-12 10:12:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:12:58,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 10:12:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:58,417 INFO L225 Difference]: With dead ends: 77 [2020-10-12 10:12:58,417 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:12:58,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:12:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:12:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-12 10:12:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 10:12:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-12 10:12:58,429 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-12 10:12:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:58,429 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-12 10:12:58,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:12:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-12 10:12:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:12:58,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:58,430 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-12 10:12:58,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:12:58,431 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 11 times [2020-10-12 10:12:58,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:58,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233847669] [2020-10-12 10:12:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:03,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:13:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:13:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:13:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:04,741 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2020-10-12 10:13:04,903 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 48 [2020-10-12 10:13:05,250 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-10-12 10:13:05,607 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2020-10-12 10:13:05,958 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 79 [2020-10-12 10:13:06,150 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 50 [2020-10-12 10:13:06,526 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 77 [2020-10-12 10:13:06,759 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-12 10:13:07,463 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 94 [2020-10-12 10:13:07,894 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 97 [2020-10-12 10:13:08,435 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 89 [2020-10-12 10:13:08,876 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2020-10-12 10:13:09,180 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-10-12 10:13:09,430 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-12 10:13:09,702 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-12 10:13:10,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:10,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:10,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:10,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:10,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:10,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:10,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:10,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:10,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:10,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:10,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:10,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233847669] [2020-10-12 10:13:10,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:10,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:13:10,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621133050] [2020-10-12 10:13:10,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:13:10,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:10,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:13:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:13:10,978 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 31 states. [2020-10-12 10:13:11,615 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 10:13:12,287 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2020-10-12 10:13:13,012 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 114 [2020-10-12 10:13:13,411 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-12 10:13:14,628 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 130 [2020-10-12 10:13:15,106 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-10-12 10:13:16,067 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 104 [2020-10-12 10:13:16,904 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 121 [2020-10-12 10:13:22,701 WARN L193 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 373 DAG size of output: 311 [2020-10-12 10:13:23,484 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 10:13:24,166 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-12 10:13:26,002 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 206 DAG size of output: 204 [2020-10-12 10:13:26,467 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 10:13:26,966 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 10:13:27,370 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 10:13:27,717 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 10:13:30,339 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2020-10-12 10:13:32,816 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2020-10-12 10:13:35,302 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 227 DAG size of output: 227 [2020-10-12 10:13:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:35,421 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-12 10:13:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:13:35,422 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-10-12 10:13:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:35,423 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:13:35,423 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 10:13:35,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=332, Invalid=2748, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:13:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 10:13:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 10:13:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:13:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-12 10:13:35,439 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2020-10-12 10:13:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:35,439 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-12 10:13:35,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:13:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-12 10:13:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:13:35,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:35,440 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 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 10:13:35,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:13:35,440 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 532811139, now seen corresponding path program 12 times [2020-10-12 10:13:35,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:35,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413063718] [2020-10-12 10:13:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:13:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:13:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:41,027 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:13:41,178 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-12 10:13:41,447 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-12 10:13:43,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:43,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:43,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:43,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:43,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:43,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:43,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:43,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:43,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:43,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:43,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:43,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413063718] [2020-10-12 10:13:43,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:43,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:13:43,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699316147] [2020-10-12 10:13:43,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:13:43,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:13:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:13:43,617 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 32 states. [2020-10-12 10:13:44,964 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:13:45,440 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-12 10:13:45,816 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 41 [2020-10-12 10:13:46,125 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 10:13:46,593 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-12 10:13:46,916 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 52 [2020-10-12 10:13:47,307 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-12 10:13:47,678 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-12 10:13:47,943 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-12 10:13:48,164 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-12 10:13:48,536 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-12 10:13:48,743 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-12 10:13:49,760 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-12 10:13:50,347 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-12 10:13:51,083 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-12 10:13:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:51,189 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-12 10:13:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:13:51,190 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-12 10:13:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:51,191 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:13:51,191 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 10:13:51,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=495, Invalid=3287, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:13:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 10:13:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-12 10:13:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:13:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 10:13:51,209 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 52 [2020-10-12 10:13:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:51,209 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 10:13:51,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:13:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 10:13:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:13:51,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:51,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-12 10:13:51,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:13:51,210 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1863650753, now seen corresponding path program 13 times [2020-10-12 10:13:51,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:51,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384530581] [2020-10-12 10:13:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:13:56,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:56,708 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-10-12 10:13:56,956 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-10-12 10:13:57,269 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2020-10-12 10:13:57,460 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-10-12 10:13:57,665 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2020-10-12 10:13:57,891 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-10-12 10:13:58,131 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 37 [2020-10-12 10:13:58,348 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-12 10:13:58,596 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-12 10:13:58,791 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-12 10:13:58,976 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-12 10:13:59,172 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-12 10:13:59,399 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-12 10:13:59,599 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-12 10:13:59,870 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-12 10:14:00,441 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 10:14:00,665 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-12 10:14:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:02,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:02,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:02,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:02,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:02,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:02,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:02,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:02,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384530581] [2020-10-12 10:14:02,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:02,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:14:02,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304165818] [2020-10-12 10:14:02,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:14:02,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:14:02,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:14:02,168 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 34 states. [2020-10-12 10:14:03,751 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 65 [2020-10-12 10:14:04,088 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-12 10:14:04,760 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2020-10-12 10:14:05,173 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 48 [2020-10-12 10:14:05,608 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 10:14:05,905 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-12 10:14:06,224 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 10:14:06,483 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-12 10:14:07,009 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-10-12 10:14:07,330 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-12 10:14:07,691 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-12 10:14:08,117 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-12 10:14:08,455 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-12 10:14:08,833 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-12 10:14:09,137 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 10:14:09,431 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-12 10:14:09,784 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-12 10:14:10,117 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-12 10:14:10,538 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-12 10:14:10,754 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 10:14:11,436 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2020-10-12 10:14:11,685 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 10:14:12,273 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2020-10-12 10:14:13,263 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2020-10-12 10:14:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:13,368 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-12 10:14:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:14:13,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 54 [2020-10-12 10:14:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:13,372 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:14:13,372 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 10:14:13,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=549, Invalid=4143, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:14:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 10:14:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2020-10-12 10:14:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:14:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-12 10:14:13,392 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2020-10-12 10:14:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:13,393 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-12 10:14:13,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:14:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-12 10:14:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:14:13,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:13,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 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 10:14:13,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:14:13,394 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:13,394 INFO L82 PathProgramCache]: Analyzing trace with hash -355274585, now seen corresponding path program 14 times [2020-10-12 10:14:13,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:13,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196104452] [2020-10-12 10:14:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:13,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:14,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:18,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:14:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 10:14:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:18,845 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-10-12 10:14:19,055 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-12 10:14:19,399 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-12 10:14:19,683 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 10:14:19,843 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-12 10:14:20,139 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-12 10:14:21,698 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-12 10:14:22,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:22,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:22,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:22,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:22,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:22,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196104452] [2020-10-12 10:14:22,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:22,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:14:22,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133969063] [2020-10-12 10:14:22,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:14:22,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:14:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:14:22,714 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 34 states. [2020-10-12 10:14:24,357 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-12 10:14:25,067 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-12 10:14:25,482 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 40 [2020-10-12 10:14:27,606 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-12 10:14:28,082 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 10:14:28,316 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 10:14:28,785 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-12 10:14:29,189 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-12 10:14:29,716 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-12 10:14:30,016 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-12 10:14:30,415 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 10:14:30,655 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-12 10:14:31,105 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-12 10:14:31,403 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 10:14:31,786 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 10:14:32,035 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-12 10:14:32,567 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-12 10:14:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:32,665 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-10-12 10:14:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:14:32,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 55 [2020-10-12 10:14:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:32,669 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:14:32,669 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:14:32,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=551, Invalid=4005, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:14:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:14:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2020-10-12 10:14:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:14:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-12 10:14:32,689 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 55 [2020-10-12 10:14:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:32,689 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-12 10:14:32,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:14:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-12 10:14:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:14:32,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:32,691 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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 10:14:32,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:14:32,691 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 900265599, now seen corresponding path program 15 times [2020-10-12 10:14:32,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:32,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330600602] [2020-10-12 10:14:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:33,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:37,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:37,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:14:37,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:14:37,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-12 10:14:37,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:14:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:14:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:14:37,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:38,895 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2020-10-12 10:14:39,049 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-10-12 10:14:39,390 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 38 [2020-10-12 10:14:40,650 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 185 DAG size of output: 60 [2020-10-12 10:14:41,782 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 83 [2020-10-12 10:14:43,801 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 194 DAG size of output: 62 [2020-10-12 10:14:49,115 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 221 DAG size of output: 138 [2020-10-12 10:14:49,960 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 94 [2020-10-12 10:14:50,792 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 108 [2020-10-12 10:14:51,440 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 84 [2020-10-12 10:14:52,577 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 195 DAG size of output: 100 [2020-10-12 10:14:53,210 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 78 [2020-10-12 10:14:53,574 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 10:14:55,249 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 167 DAG size of output: 124 [2020-10-12 10:14:56,418 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 114 [2020-10-12 10:14:58,534 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2020-10-12 10:14:59,452 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 89 [2020-10-12 10:15:00,783 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 140 DAG size of output: 88 [2020-10-12 10:15:01,575 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 79 [2020-10-12 10:15:02,424 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 64 [2020-10-12 10:15:03,154 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 51 [2020-10-12 10:15:03,743 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 38 [2020-10-12 10:15:04,130 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 29 [2020-10-12 10:15:04,504 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 28 [2020-10-12 10:15:04,925 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 28 [2020-10-12 10:15:06,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:06,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:06,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:06,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:06,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:06,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:06,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:06,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:06,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:15:06,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:06,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:15:06,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 18 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:15:06,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330600602] [2020-10-12 10:15:06,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:06,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:15:06,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467619405] [2020-10-12 10:15:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:15:06,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:15:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:15:06,144 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 35 states. [2020-10-12 10:15:18,553 WARN L193 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 399 DAG size of output: 281 [2020-10-12 10:15:20,685 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 266 DAG size of output: 154 [2020-10-12 10:15:24,330 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 145 DAG size of output: 144 [2020-10-12 10:15:25,314 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 108 [2020-10-12 10:15:26,441 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 113 [2020-10-12 10:15:28,436 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 182 DAG size of output: 135 [2020-10-12 10:15:29,464 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76