/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-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:16:13,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:16:13,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:16:13,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:16:13,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:16:13,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:16:13,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:16:13,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:16:13,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:16:13,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:16:13,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:16:13,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:16:13,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:16:13,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:16:13,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:16:13,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:16:13,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:16:13,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:16:13,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:16:13,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:16:13,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:16:13,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:16:13,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:16:13,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:16:13,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:16:13,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:16:13,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:16:13,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:16:13,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:16:13,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:16:13,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:16:13,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:16:13,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:16:13,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:16:13,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:16:13,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:16:13,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:16:13,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:16:13,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:16:13,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:16:13,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:16:13,712 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 10:16:13,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:16:13,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:16:13,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:16:13,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:16:13,753 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:16:13,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:16:13,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:16:13,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:16:13,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:16:13,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:16:13,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:16:13,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:16:13,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:16:13,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:16:13,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:16:13,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:16:13,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:16:13,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:16:13,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:16:13,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:16:13,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:16:13,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:16:13,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:16:13,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:16:13,759 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 10:16:14,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:16:14,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:16:14,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:16:14,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:16:14,083 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:16:14,084 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-12 10:16:14,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a6c2cb9/40f16edc2f6d464091486b2af61ce770/FLAG9f3112c83 [2020-10-12 10:16:14,641 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:16:14,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-12 10:16:14,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a6c2cb9/40f16edc2f6d464091486b2af61ce770/FLAG9f3112c83 [2020-10-12 10:16:15,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a6c2cb9/40f16edc2f6d464091486b2af61ce770 [2020-10-12 10:16:15,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:16:15,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:16:15,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:15,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:16:15,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:16:15,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:15" (1/1) ... [2020-10-12 10:16:15,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7673bb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:15, skipping insertion in model container [2020-10-12 10:16:15,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:15" (1/1) ... [2020-10-12 10:16:15,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:16:15,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:16:15,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:17,081 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:16:17,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:17,134 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:16:17,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17 WrapperNode [2020-10-12 10:16:17,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:17,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:16:17,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:16:17,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:16:17,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... [2020-10-12 10:16:17,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:16:17,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:16:17,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:16:17,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:16:17,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:16:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:16:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:16:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:16:17,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:16:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:16:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:16:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:16:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:16:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:16:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:16:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:16:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:16:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:16:17,673 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:16:17,673 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:16:17,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:17 BoogieIcfgContainer [2020-10-12 10:16:17,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:16:17,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:16:17,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:16:17,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:16:17,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:16:15" (1/3) ... [2020-10-12 10:16:17,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f79af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:17, skipping insertion in model container [2020-10-12 10:16:17,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:17" (2/3) ... [2020-10-12 10:16:17,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f79af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:17, skipping insertion in model container [2020-10-12 10:16:17,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:17" (3/3) ... [2020-10-12 10:16:17,687 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2020-10-12 10:16:17,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:16:17,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:16:17,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:16:17,750 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:16:17,751 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:16:17,751 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:16:17,751 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:16:17,751 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:16:17,752 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:16:17,752 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:16:17,752 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:16:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 10:16:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:16:17,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:17,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:17,781 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2020-10-12 10:16:17,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:17,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244972001] [2020-10-12 10:16:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:18,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:16:18,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:18,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 10:16:18,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:16:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:16:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:18,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:18,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:18,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 10:16:18,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:18,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:18,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:18,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:18,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:18,102 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 10:16:18,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244972001] [2020-10-12 10:16:18,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:18,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:16:18,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528449356] [2020-10-12 10:16:18,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:16:18,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:16:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:18,131 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-12 10:16:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:18,238 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-12 10:16:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:16:18,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-12 10:16:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:18,252 INFO L225 Difference]: With dead ends: 52 [2020-10-12 10:16:18,252 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 10:16:18,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 10:16:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-12 10:16:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 10:16:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-12 10:16:18,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-10-12 10:16:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:18,299 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-12 10:16:18,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:16:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-12 10:16:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:16:18,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:18,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:18,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:16:18,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:18,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2020-10-12 10:16:18,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:18,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609121734] [2020-10-12 10:16:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:18,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:18,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:16:18,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:18,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 10:16:18,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:18,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:18,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:18,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:18,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:16:18,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:18,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:18,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:18,556 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 10:16:18,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609121734] [2020-10-12 10:16:18,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:18,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:16:18,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627120086] [2020-10-12 10:16:18,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:16:18,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:16:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:18,560 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-12 10:16:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:18,658 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-12 10:16:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:16:18,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 10:16:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:18,660 INFO L225 Difference]: With dead ends: 39 [2020-10-12 10:16:18,660 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 10:16:18,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 10:16:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-12 10:16:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 10:16:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 10:16:18,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2020-10-12 10:16:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:18,671 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 10:16:18,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:16:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 10:16:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:16:18,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:18,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:18,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:16:18,674 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2020-10-12 10:16:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:18,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18908053] [2020-10-12 10:16:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:19,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:16:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-12 10:16:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:16:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:16:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:16:19,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:19,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:19,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:19,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:16:19,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:19,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18908053] [2020-10-12 10:16:19,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:19,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:16:19,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709673711] [2020-10-12 10:16:19,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:16:19,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:19,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:16:19,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:16:19,275 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-10-12 10:16:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:19,588 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-12 10:16:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:16:19,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-12 10:16:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:19,591 INFO L225 Difference]: With dead ends: 44 [2020-10-12 10:16:19,591 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 10:16:19,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:16:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 10:16:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2020-10-12 10:16:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:16:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 10:16:19,601 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2020-10-12 10:16:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:19,601 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 10:16:19,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:16:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 10:16:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:16:19,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:19,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:19,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:16:19,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash -714399150, now seen corresponding path program 1 times [2020-10-12 10:16:19,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:19,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038625722] [2020-10-12 10:16:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:16:20,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:16:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-12 10:16:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:16:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:16:20,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:20,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 10:16:20,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:20,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:20,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:20,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:20,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 10:16:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:20,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:16:20,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:16:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:16:20,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:20,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038625722] [2020-10-12 10:16:20,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:20,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:16:20,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294962733] [2020-10-12 10:16:20,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:16:20,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:16:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:16:20,599 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-10-12 10:16:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:21,489 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-12 10:16:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:16:21,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 10:16:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:21,491 INFO L225 Difference]: With dead ends: 53 [2020-10-12 10:16:21,491 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:16:21,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:16:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:16:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 10:16:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 10:16:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 10:16:21,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-10-12 10:16:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:21,499 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 10:16:21,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:16:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 10:16:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:16:21,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:21,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:21,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:16:21,501 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1639477172, now seen corresponding path program 2 times [2020-10-12 10:16:21,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:21,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438544374] [2020-10-12 10:16:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:16:21,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 10:16:21,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:16:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:16:21,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:22,043 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 10:16:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:22,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:22,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:16:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:22,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:16:22,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:16:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:22,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438544374] [2020-10-12 10:16:22,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:22,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:16:22,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762215479] [2020-10-12 10:16:22,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:16:22,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:16:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:22,361 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2020-10-12 10:16:22,716 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 10:16:22,919 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 10:16:23,234 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 10:16:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:23,740 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-12 10:16:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:16:23,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-12 10:16:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:23,742 INFO L225 Difference]: With dead ends: 53 [2020-10-12 10:16:23,742 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:16:23,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:16:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:16:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 10:16:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:16:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 10:16:23,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-12 10:16:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:23,752 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 10:16:23,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:16:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 10:16:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:16:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:23,753 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] [2020-10-12 10:16:23,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:16:23,753 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 266857622, now seen corresponding path program 3 times [2020-10-12 10:16:23,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:23,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106601692] [2020-10-12 10:16:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:23,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:23,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:16:23,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-12 10:16:23,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:16:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:24,703 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-12 10:16:24,920 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-12 10:16:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:25,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:25,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:16:25,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:25,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:25,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:25,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:16:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:25,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:25,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:25,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:25,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:16:25,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:25,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106601692] [2020-10-12 10:16:25,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:25,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:16:25,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447986472] [2020-10-12 10:16:25,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:16:25,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:16:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:16:25,115 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-12 10:16:25,720 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-12 10:16:26,034 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-12 10:16:26,292 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:16:26,876 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-12 10:16:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:27,172 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-12 10:16:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:16:27,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-12 10:16:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:27,174 INFO L225 Difference]: With dead ends: 55 [2020-10-12 10:16:27,174 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 10:16:27,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 10:16:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 10:16:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:16:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-12 10:16:27,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-12 10:16:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:27,183 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-12 10:16:27,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:16:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-12 10:16:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:16:27,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:27,184 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:27,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:16:27,184 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash -265570056, now seen corresponding path program 4 times [2020-10-12 10:16:27,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:27,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834780182] [2020-10-12 10:16:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:27,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:16:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,310 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-12 10:16:28,558 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-12 10:16:29,080 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-12 10:16:29,805 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-12 10:16:30,656 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2020-10-12 10:16:31,165 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-12 10:16:31,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:31,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:16:31,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:16:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:31,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:16:31,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:31,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:31,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834780182] [2020-10-12 10:16:31,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:31,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:16:31,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619987230] [2020-10-12 10:16:31,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:16:31,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:31,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:16:31,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:16:31,430 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2020-10-12 10:16:32,796 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-12 10:16:33,753 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-12 10:16:34,394 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-12 10:16:34,751 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-12 10:16:35,224 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:16:35,579 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-12 10:16:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:35,956 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-12 10:16:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:16:35,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-12 10:16:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:35,959 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:16:35,959 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:16:35,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:16:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:16:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 10:16:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:16:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 10:16:35,967 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2020-10-12 10:16:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:35,967 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 10:16:35,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:16:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 10:16:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:16:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:35,969 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:35,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:16:35,969 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -827460390, now seen corresponding path program 5 times [2020-10-12 10:16:35,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:35,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280725201] [2020-10-12 10:16:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:36,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:16:36,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:16:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:39,095 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 10:16:39,390 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-12 10:16:39,819 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-12 10:16:40,339 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-12 10:16:41,302 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2020-10-12 10:16:42,807 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2020-10-12 10:16:45,065 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 85 [2020-10-12 10:16:46,105 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 84 [2020-10-12 10:16:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:46,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:46,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:46,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:16:46,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:46,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:46,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 10:16:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:46,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:46,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:46,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:16:46,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:46,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:46,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:46,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280725201] [2020-10-12 10:16:46,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:46,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:16:46,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979017426] [2020-10-12 10:16:46,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:16:46,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:46,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:16:46,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:16:46,451 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 19 states. [2020-10-12 10:16:49,197 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-10-12 10:16:51,215 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-12 10:16:52,336 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-12 10:16:53,063 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-12 10:16:53,885 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-12 10:16:55,252 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 10:16:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:55,981 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-12 10:16:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:16:55,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-12 10:16:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:55,983 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:16:55,983 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:16:55,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:16:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:16:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 10:16:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:16:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 10:16:55,992 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-10-12 10:16:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:55,992 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 10:16:55,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:16:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 10:16:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:16:55,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:55,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:55,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:16:55,994 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 361807932, now seen corresponding path program 6 times [2020-10-12 10:16:55,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:55,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129870762] [2020-10-12 10:16:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:56,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:56,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:56,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:16:56,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:56,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-12 10:16:56,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:16:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:16:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:16:56,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:05,069 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-12 10:17:05,279 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-12 10:17:05,877 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-12 10:17:06,473 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-12 10:17:07,378 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2020-10-12 10:17:08,846 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 71 [2020-10-12 10:17:11,475 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 83 [2020-10-12 10:17:15,364 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 86 [2020-10-12 10:17:21,384 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 216 DAG size of output: 97 [2020-10-12 10:17:24,008 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 199 DAG size of output: 96 [2020-10-12 10:17:24,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:24,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:24,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:24,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 10:17:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:24,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:24,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:24,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:17:24,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:17:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:17:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:24,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129870762] [2020-10-12 10:17:24,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:24,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:17:24,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297860950] [2020-10-12 10:17:24,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:17:24,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:17:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:17:24,431 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 21 states. [2020-10-12 10:17:31,830 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 122 DAG size of output: 116 [2020-10-12 10:17:37,970 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2020-10-12 10:17:40,951 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2020-10-12 10:17:44,698 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 10:17:47,366 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 10:17:50,348 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 10:17:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:51,297 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-12 10:17:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:17:51,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-12 10:17:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:51,299 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:17:51,300 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:17:51,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:17:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:17:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 10:17:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:17:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 10:17:51,309 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-10-12 10:17:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:51,309 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 10:17:51,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:17:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 10:17:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:17:51,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:51,311 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:51,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:17:51,311 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash 787364638, now seen corresponding path program 7 times [2020-10-12 10:17:51,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:51,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095258925] [2020-10-12 10:17:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:51,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:51,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:17:51,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:17:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 10:17:51,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:17:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:17:51,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:20,325 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-12 10:18:20,619 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-12 10:18:21,182 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-12 10:18:22,289 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-12 10:18:23,904 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-12 10:18:26,498 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-12 10:18:30,321 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-12 10:18:35,850 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 140 DAG size of output: 78 [2020-10-12 10:18:45,411 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 180 DAG size of output: 87 [2020-10-12 10:18:57,527 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 183 DAG size of output: 90 [2020-10-12 10:19:15,874 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 229 DAG size of output: 99 [2020-10-12 10:19:24,614 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 181 DAG size of output: 91 [2020-10-12 10:19:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:25,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:25,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:25,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:25,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:19:25,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:25,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:25,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:25,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:25,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:19:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:25,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:25,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:25,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:25,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:25,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:25,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:19:25,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:19:25,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:25,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:25,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095258925] [2020-10-12 10:19:25,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:25,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:19:25,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686107848] [2020-10-12 10:19:25,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:19:25,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:19:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=354, Unknown=6, NotChecked=0, Total=506 [2020-10-12 10:19:25,892 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 23 states. [2020-10-12 10:19:55,398 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2020-10-12 10:20:11,761 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2020-10-12 10:20:24,361 WARN L193 SmtUtils]: Spent 9.69 s on a formula simplification. DAG size of input: 127 DAG size of output: 120