/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:07:39,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:07:39,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:07:39,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:07:39,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:07:39,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:07:39,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:07:39,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:07:39,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:07:39,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:07:39,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:07:39,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:07:39,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:07:39,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:07:39,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:07:39,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:07:39,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:07:39,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:07:39,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:07:39,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:07:39,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:07:39,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:07:39,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:07:39,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:07:39,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:07:39,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:07:39,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:07:39,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:07:39,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:07:39,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:07:39,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:07:39,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:07:39,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:07:39,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:07:39,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:07:39,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:07:39,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:07:39,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:07:39,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:07:39,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:07:39,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:07:39,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 11:07:39,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:07:39,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:07:39,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:07:39,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:07:39,846 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:07:39,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:07:39,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:07:39,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:07:39,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:07:39,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:07:39,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:07:39,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:07:39,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:07:39,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:07:39,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:07:39,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:07:39,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:07:39,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:07:39,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:07:39,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:07:39,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:07:39,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:07:39,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:07:39,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:07:39,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:07:39,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:07:39,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:07:39,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:07:39,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:07:39,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:07:40,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:07:40,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:07:40,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:07:40,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:07:40,188 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:07:40,189 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-10-13 11:07:40,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73624c82b/780e424846b54561a929658980680b77/FLAGdf7b4f02e [2020-10-13 11:07:40,729 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:07:40,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-10-13 11:07:40,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73624c82b/780e424846b54561a929658980680b77/FLAGdf7b4f02e [2020-10-13 11:07:41,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73624c82b/780e424846b54561a929658980680b77 [2020-10-13 11:07:41,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:07:41,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:07:41,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:41,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:07:41,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:07:41,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240284fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41, skipping insertion in model container [2020-10-13 11:07:41,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:07:41,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:07:41,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:41,331 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:07:41,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:41,520 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:07:41,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41 WrapperNode [2020-10-13 11:07:41,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:41,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:07:41,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:07:41,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:07:41,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... [2020-10-13 11:07:41,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:07:41,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:07:41,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:07:41,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:07:41,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:07:41,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:07:41,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:07:41,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:07:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:07:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:07:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:07:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:07:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:07:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:07:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-13 11:07:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:07:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:07:41,909 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:07:41,910 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 11:07:41,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:41 BoogieIcfgContainer [2020-10-13 11:07:41,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:07:41,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:07:41,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:07:41,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:07:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:07:41" (1/3) ... [2020-10-13 11:07:41,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565ca275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:41, skipping insertion in model container [2020-10-13 11:07:41,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:41" (2/3) ... [2020-10-13 11:07:41,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565ca275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:41, skipping insertion in model container [2020-10-13 11:07:41,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:41" (3/3) ... [2020-10-13 11:07:41,927 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-10-13 11:07:41,950 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:07:41,967 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:07:41,979 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:07:42,001 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:07:42,001 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:07:42,002 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:07:42,002 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:07:42,002 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:07:42,002 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:07:42,002 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:07:42,002 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:07:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 11:07:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-13 11:07:42,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:42,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:42,027 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2020-10-13 11:07:42,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:42,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637463202] [2020-10-13 11:07:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:42,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:42,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 11:07:42,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-13 11:07:42,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 11:07:42,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:42,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:42,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:42,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:42,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 11:07:42,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:42,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:42,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:42,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:42,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:42,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637463202] [2020-10-13 11:07:42,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:42,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:07:42,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340644380] [2020-10-13 11:07:42,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:07:42,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:07:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:07:42,479 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 11:07:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:42,578 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2020-10-13 11:07:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:07:42,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-13 11:07:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:42,590 INFO L225 Difference]: With dead ends: 42 [2020-10-13 11:07:42,591 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 11:07:42,595 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 [2020-10-13 11:07:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 11:07:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-10-13 11:07:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 11:07:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-13 11:07:42,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-10-13 11:07:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:42,637 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-13 11:07:42,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:07:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-13 11:07:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-13 11:07:42,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:42,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:42,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:07:42,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2020-10-13 11:07:42,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:42,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482058779] [2020-10-13 11:07:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:42,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 11:07:42,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 11:07:42,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:42,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:42,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:07:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:42,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:42,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:42,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:42,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:42,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:42,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482058779] [2020-10-13 11:07:42,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:42,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:07:42,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246062066] [2020-10-13 11:07:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:07:42,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:07:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:42,952 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-13 11:07:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:43,067 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-13 11:07:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:43,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-13 11:07:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:43,069 INFO L225 Difference]: With dead ends: 36 [2020-10-13 11:07:43,070 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:07:43,071 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 [2020-10-13 11:07:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:07:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2020-10-13 11:07:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 11:07:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-13 11:07:43,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-10-13 11:07:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:43,079 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-13 11:07:43,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:07:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-13 11:07:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 11:07:43,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:43,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:43,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:07:43,081 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2020-10-13 11:07:43,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:43,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518614748] [2020-10-13 11:07:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:43,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:43,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:07:43,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:43,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-13 11:07:43,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:07:43,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:43,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:43,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:43,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:43,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:43,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518614748] [2020-10-13 11:07:43,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:43,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:07:43,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334069826] [2020-10-13 11:07:43,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:07:43,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:07:43,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:43,382 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-13 11:07:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:43,494 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-10-13 11:07:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:43,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 11:07:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:43,496 INFO L225 Difference]: With dead ends: 40 [2020-10-13 11:07:43,497 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 11:07:43,497 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 [2020-10-13 11:07:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 11:07:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-10-13 11:07:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 11:07:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 11:07:43,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-13 11:07:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:43,505 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 11:07:43,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:07:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 11:07:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 11:07:43,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:43,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:43,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:07:43,507 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1111837415, now seen corresponding path program 1 times [2020-10-13 11:07:43,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:43,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203083816] [2020-10-13 11:07:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:43,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:43,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:07:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-13 11:07:43,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:43,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:07:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:43,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203083816] [2020-10-13 11:07:43,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:43,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:07:43,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495472672] [2020-10-13 11:07:43,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:07:43,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:07:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:43,968 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 11:07:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:44,062 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-13 11:07:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:44,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 11:07:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:44,064 INFO L225 Difference]: With dead ends: 31 [2020-10-13 11:07:44,064 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 11:07:44,065 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 [2020-10-13 11:07:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 11:07:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-10-13 11:07:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 11:07:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-13 11:07:44,081 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-13 11:07:44,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:44,082 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-13 11:07:44,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:07:44,082 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-13 11:07:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 11:07:44,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:44,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:44,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:07:44,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:44,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1672606071, now seen corresponding path program 1 times [2020-10-13 11:07:44,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:44,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128987400] [2020-10-13 11:07:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:44,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:45,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:07:45,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-13 11:07:45,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:45,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 11:07:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:45,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:45,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:45,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:45,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128987400] [2020-10-13 11:07:45,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:45,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:07:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518583884] [2020-10-13 11:07:45,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:07:45,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:07:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:45,130 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-13 11:07:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:45,214 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-13 11:07:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:07:45,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 11:07:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:45,215 INFO L225 Difference]: With dead ends: 34 [2020-10-13 11:07:45,216 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 11:07:45,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 11:07:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-13 11:07:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 11:07:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 11:07:45,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-13 11:07:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:45,222 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 11:07:45,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:07:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 11:07:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 11:07:45,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:45,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:45,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:07:45,224 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1758170709, now seen corresponding path program 2 times [2020-10-13 11:07:45,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:45,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261880119] [2020-10-13 11:07:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:47,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:47,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-10-13 11:07:47,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:47,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:07:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:47,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:47,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:47,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:47,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:47,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:47,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:47,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:47,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261880119] [2020-10-13 11:07:47,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:47,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:07:47,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326345582] [2020-10-13 11:07:47,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:07:47,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:07:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:47,178 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-13 11:07:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:47,280 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 11:07:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:07:47,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 11:07:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:47,282 INFO L225 Difference]: With dead ends: 38 [2020-10-13 11:07:47,282 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 11:07:47,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 11:07:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-13 11:07:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 11:07:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 11:07:47,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-13 11:07:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:47,290 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 11:07:47,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:07:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 11:07:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 11:07:47,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:47,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:47,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:07:47,292 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1913558093, now seen corresponding path program 3 times [2020-10-13 11:07:47,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:47,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935402527] [2020-10-13 11:07:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:49,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:50,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:07:50,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:50,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3149 [2020-10-13 11:07:50,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:50,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:07:50,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:07:50,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:50,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:50,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:50,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:50,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:50,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935402527] [2020-10-13 11:07:50,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:50,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:07:50,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617852907] [2020-10-13 11:07:50,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:50,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:50,571 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-10-13 11:07:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:50,688 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-13 11:07:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:07:50,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 11:07:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:50,689 INFO L225 Difference]: With dead ends: 42 [2020-10-13 11:07:50,689 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 11:07:50,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 11:07:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-13 11:07:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 11:07:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 11:07:50,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-13 11:07:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:50,697 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 11:07:50,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 11:07:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 11:07:50,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:50,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:50,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:07:50,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash 18180497, now seen corresponding path program 4 times [2020-10-13 11:07:50,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:50,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692529926] [2020-10-13 11:07:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:55,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:55,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 11:07:55,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:55,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:07:55,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:07:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:55,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:07:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:55,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:55,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:55,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:55,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:55,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:07:55,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:55,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:55,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692529926] [2020-10-13 11:07:55,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:55,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:07:55,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191825113] [2020-10-13 11:07:55,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:07:55,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:07:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:55,856 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-10-13 11:07:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:56,031 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-13 11:07:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:07:56,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 11:07:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:56,032 INFO L225 Difference]: With dead ends: 46 [2020-10-13 11:07:56,033 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:07:56,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:07:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:07:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 11:07:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 11:07:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 11:07:56,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-13 11:07:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:56,046 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 11:07:56,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:07:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 11:07:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 11:07:56,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:56,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:56,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:07:56,047 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 993093615, now seen corresponding path program 5 times [2020-10-13 11:07:56,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:56,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703538475] [2020-10-13 11:07:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:00,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 11:08:00,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:00,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4548 [2020-10-13 11:08:00,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:08:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:08:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:00,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:00,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:00,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:00,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:00,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703538475] [2020-10-13 11:08:00,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:00,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:08:00,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53256450] [2020-10-13 11:08:00,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:08:00,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:08:00,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:00,814 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-10-13 11:08:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:00,985 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 11:08:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:08:00,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 11:08:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:00,988 INFO L225 Difference]: With dead ends: 50 [2020-10-13 11:08:00,988 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 11:08:00,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 11:08:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-13 11:08:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 11:08:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 11:08:01,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-13 11:08:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:01,001 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 11:08:01,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:08:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 11:08:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 11:08:01,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:01,004 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:01,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:08:01,004 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1581729485, now seen corresponding path program 6 times [2020-10-13 11:08:01,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:01,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114235204] [2020-10-13 11:08:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:06,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:08:06,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 11:08:06,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:06,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:08:06,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:06,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:06,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:06,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:06,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:08:06,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:06,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:06,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:06,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:06,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114235204] [2020-10-13 11:08:06,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:08:06,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345197470] [2020-10-13 11:08:06,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:08:06,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:08:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:06,271 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-13 11:08:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:06,479 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 11:08:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:08:06,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 11:08:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:06,481 INFO L225 Difference]: With dead ends: 54 [2020-10-13 11:08:06,481 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:08:06,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:08:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-13 11:08:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 11:08:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 11:08:06,489 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-13 11:08:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:06,490 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 11:08:06,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:08:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 11:08:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 11:08:06,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:06,495 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:06,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:08:06,495 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 325117483, now seen corresponding path program 7 times [2020-10-13 11:08:06,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:06,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144392006] [2020-10-13 11:08:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 11:08:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:08:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:11,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:11,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:11,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:11,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:11,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:11,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144392006] [2020-10-13 11:08:11,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:11,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:08:11,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744968529] [2020-10-13 11:08:11,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:08:11,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:08:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:11,758 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-13 11:08:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:11,993 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-13 11:08:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:08:11,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-13 11:08:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:11,994 INFO L225 Difference]: With dead ends: 58 [2020-10-13 11:08:11,994 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:08:11,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:08:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:08:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 11:08:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:08:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 11:08:12,001 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-13 11:08:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:12,001 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 11:08:12,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:08:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 11:08:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 11:08:12,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:12,002 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:12,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:08:12,002 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash -393206263, now seen corresponding path program 8 times [2020-10-13 11:08:12,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:12,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557463302] [2020-10-13 11:08:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:12,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:14,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 11:08:17,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:17,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 11:08:17,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:08:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:17,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:17,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:17,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:17,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:17,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:17,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557463302] [2020-10-13 11:08:17,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:17,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:08:17,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258317236] [2020-10-13 11:08:17,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:08:17,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:08:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:08:17,261 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-10-13 11:08:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:17,520 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-10-13 11:08:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:08:17,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 11:08:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:17,522 INFO L225 Difference]: With dead ends: 62 [2020-10-13 11:08:17,522 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 11:08:17,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:08:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 11:08:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-13 11:08:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:08:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 11:08:17,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-13 11:08:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:17,530 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 11:08:17,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:08:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 11:08:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:08:17,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:17,531 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:17,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:08:17,531 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash 787408487, now seen corresponding path program 9 times [2020-10-13 11:08:17,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:17,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518403638] [2020-10-13 11:08:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:17,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:08:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:08:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:22,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:22,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:22,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:22,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:22,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:22,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:22,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:22,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518403638] [2020-10-13 11:08:22,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:22,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:08:22,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133814407] [2020-10-13 11:08:22,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:08:22,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:08:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:08:22,756 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-13 11:08:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:23,016 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-13 11:08:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:08:23,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 11:08:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:23,018 INFO L225 Difference]: With dead ends: 66 [2020-10-13 11:08:23,018 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 11:08:23,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:08:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 11:08:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-13 11:08:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 11:08:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 11:08:23,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-13 11:08:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:23,031 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 11:08:23,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:08:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 11:08:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:08:23,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:23,034 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:23,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:08:23,035 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1486817093, now seen corresponding path program 10 times [2020-10-13 11:08:23,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:23,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355588639] [2020-10-13 11:08:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:27,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:08:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:08:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:28,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:28,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:28,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:28,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:28,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:28,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355588639] [2020-10-13 11:08:28,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:28,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:08:28,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692108217] [2020-10-13 11:08:28,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:08:28,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:08:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:08:28,283 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-10-13 11:08:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:28,608 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-13 11:08:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:08:28,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 11:08:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:28,609 INFO L225 Difference]: With dead ends: 70 [2020-10-13 11:08:28,609 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 11:08:28,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:08:28,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 11:08:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 11:08:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:08:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 11:08:28,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-13 11:08:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:28,620 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 11:08:28,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:08:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 11:08:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:08:28,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:28,624 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:28,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:08:28,624 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash -691378013, now seen corresponding path program 11 times [2020-10-13 11:08:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:28,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10392132] [2020-10-13 11:08:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:33,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:33,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:08:33,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:33,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 11:08:33,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:08:33,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:33,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:33,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:33,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:33,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:33,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:33,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:33,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:33,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10392132] [2020-10-13 11:08:33,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:33,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:08:33,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874951748] [2020-10-13 11:08:33,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:08:33,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:08:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:08:33,893 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-13 11:08:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:34,242 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-13 11:08:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:08:34,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 11:08:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:34,244 INFO L225 Difference]: With dead ends: 74 [2020-10-13 11:08:34,244 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:08:34,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:08:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-13 11:08:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 11:08:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 11:08:34,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-13 11:08:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:34,251 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 11:08:34,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:08:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 11:08:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:08:34,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:34,252 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:34,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:08:34,252 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2007165569, now seen corresponding path program 12 times [2020-10-13 11:08:34,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:34,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884685878] [2020-10-13 11:08:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:08:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:08:39,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:39,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:39,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:39,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884685878] [2020-10-13 11:08:39,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:39,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:08:39,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142134832] [2020-10-13 11:08:39,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:08:39,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:08:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:39,616 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2020-10-13 11:08:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:40,029 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-13 11:08:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:08:40,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 11:08:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:40,031 INFO L225 Difference]: With dead ends: 78 [2020-10-13 11:08:40,031 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:08:40,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:08:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 11:08:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 11:08:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 11:08:40,041 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-13 11:08:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:40,041 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 11:08:40,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:08:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 11:08:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:08:40,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:40,044 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:40,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:08:40,044 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1147301087, now seen corresponding path program 13 times [2020-10-13 11:08:40,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:40,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582416701] [2020-10-13 11:08:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:40,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:45,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 11:08:45,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:08:45,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5234 [2020-10-13 11:08:45,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:08:45,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:08:45,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:45,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:45,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582416701] [2020-10-13 11:08:45,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:45,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:08:45,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668252529] [2020-10-13 11:08:45,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:08:45,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:08:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:45,583 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 17 states. [2020-10-13 11:08:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:45,969 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-10-13 11:08:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 11:08:45,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-13 11:08:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:45,971 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:08:45,972 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:08:45,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:08:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:08:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-13 11:08:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:08:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 11:08:45,980 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-13 11:08:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:45,981 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 11:08:45,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:08:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 11:08:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:08:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:45,981 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:45,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:08:45,982 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -548745283, now seen corresponding path program 14 times [2020-10-13 11:08:45,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:45,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675613158] [2020-10-13 11:08:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:46,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:51,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:08:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:51,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:51,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:51,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675613158] [2020-10-13 11:08:51,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:51,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:08:51,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126239572] [2020-10-13 11:08:51,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:08:51,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:08:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:08:51,398 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 18 states. [2020-10-13 11:08:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:51,869 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-10-13 11:08:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:08:51,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-13 11:08:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:51,871 INFO L225 Difference]: With dead ends: 86 [2020-10-13 11:08:51,871 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 11:08:51,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 11:08:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-13 11:08:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 11:08:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-13 11:08:51,877 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-13 11:08:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:51,878 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-13 11:08:51,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:08:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-13 11:08:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:08:51,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:51,879 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:51,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:08:51,879 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1638265627, now seen corresponding path program 15 times [2020-10-13 11:08:51,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:51,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502436351] [2020-10-13 11:08:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:56,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:08:56,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 11:08:56,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:08:57,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502436351] [2020-10-13 11:08:57,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:57,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:08:57,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495588130] [2020-10-13 11:08:57,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:08:57,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:08:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:57,273 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-10-13 11:08:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:57,800 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-10-13 11:08:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:08:57,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-13 11:08:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:57,801 INFO L225 Difference]: With dead ends: 90 [2020-10-13 11:08:57,801 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:08:57,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:08:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:08:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-13 11:08:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 11:08:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 11:08:57,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-13 11:08:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:57,818 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 11:08:57,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:08:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 11:08:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:08:57,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:57,819 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:57,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:08:57,819 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1178224903, now seen corresponding path program 16 times [2020-10-13 11:08:57,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:57,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882347630] [2020-10-13 11:08:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:09:02,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:03,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:03,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882347630] [2020-10-13 11:09:03,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:03,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:09:03,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914311696] [2020-10-13 11:09:03,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:09:03,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:09:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:09:03,208 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 20 states. [2020-10-13 11:09:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:03,781 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-10-13 11:09:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:09:03,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-13 11:09:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:03,784 INFO L225 Difference]: With dead ends: 94 [2020-10-13 11:09:03,784 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 11:09:03,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:09:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 11:09:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-13 11:09:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 11:09:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 11:09:03,791 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-13 11:09:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:03,791 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 11:09:03,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:09:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 11:09:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:09:03,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:03,792 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:03,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:09:03,792 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1996227753, now seen corresponding path program 17 times [2020-10-13 11:09:03,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:03,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234363372] [2020-10-13 11:09:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:03,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:09,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5390 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:09:09,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:09,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:09,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:09,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234363372] [2020-10-13 11:09:09,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:09,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:09:09,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280915169] [2020-10-13 11:09:09,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:09:09,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:09:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:09:09,577 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 21 states. [2020-10-13 11:09:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:10,151 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-10-13 11:09:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:09:10,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 11:09:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:10,159 INFO L225 Difference]: With dead ends: 98 [2020-10-13 11:09:10,159 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 11:09:10,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:09:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 11:09:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 11:09:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 11:09:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 11:09:10,165 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-13 11:09:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:10,165 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 11:09:10,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:09:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 11:09:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:09:10,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:10,166 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:10,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:09:10,166 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2117951435, now seen corresponding path program 18 times [2020-10-13 11:09:10,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:10,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294387824] [2020-10-13 11:09:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:15,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:09:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5291 [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:09:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:15,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:15,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:15,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:15,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:09:15,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:15,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:15,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:16,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294387824] [2020-10-13 11:09:16,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:16,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:09:16,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717764391] [2020-10-13 11:09:16,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:09:16,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:09:16,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:09:16,021 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 22 states. [2020-10-13 11:09:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:17,062 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-13 11:09:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:09:17,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-13 11:09:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:17,066 INFO L225 Difference]: With dead ends: 102 [2020-10-13 11:09:17,069 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:09:17,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:09:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:09:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-13 11:09:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 11:09:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 11:09:17,083 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-13 11:09:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:17,084 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 11:09:17,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:09:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 11:09:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:09:17,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:17,086 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:17,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:09:17,086 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1164674451, now seen corresponding path program 19 times [2020-10-13 11:09:17,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:17,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470626919] [2020-10-13 11:09:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:22,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:22,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:09:22,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:22,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 11:09:22,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:09:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:22,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:09:22,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:22,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:22,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:22,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:22,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:09:22,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:22,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470626919] [2020-10-13 11:09:22,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:22,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:09:22,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239275104] [2020-10-13 11:09:22,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:09:22,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:09:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:09:22,601 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 23 states. [2020-10-13 11:09:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:23,354 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2020-10-13 11:09:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:09:23,356 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 11:09:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:23,357 INFO L225 Difference]: With dead ends: 106 [2020-10-13 11:09:23,357 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 11:09:23,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:09:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 11:09:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-13 11:09:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 11:09:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 11:09:23,367 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-13 11:09:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:23,368 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 11:09:23,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:09:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 11:09:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:09:23,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:23,369 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:23,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:09:23,370 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1032811663, now seen corresponding path program 20 times [2020-10-13 11:09:23,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:23,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765643337] [2020-10-13 11:09:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:28,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:28,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5291 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:09:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:29,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:29,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:29,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:29,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:09:29,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:29,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765643337] [2020-10-13 11:09:29,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:29,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:09:29,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625122001] [2020-10-13 11:09:29,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:09:29,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:09:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:09:29,249 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 24 states. [2020-10-13 11:09:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:30,086 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-10-13 11:09:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:09:30,086 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-13 11:09:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:30,088 INFO L225 Difference]: With dead ends: 110 [2020-10-13 11:09:30,088 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 11:09:30,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:09:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 11:09:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-13 11:09:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 11:09:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 11:09:30,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-13 11:09:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:30,094 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 11:09:30,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:09:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 11:09:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:09:30,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:30,095 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:30,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:09:30,095 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash 306942415, now seen corresponding path program 21 times [2020-10-13 11:09:30,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:30,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955680003] [2020-10-13 11:09:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:35,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5263 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:09:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:35,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:35,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:35,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:35,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:09:35,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:35,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:35,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955680003] [2020-10-13 11:09:35,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:35,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:09:35,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639627685] [2020-10-13 11:09:35,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:09:35,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:09:35,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:09:35,898 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 25 states. [2020-10-13 11:09:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:36,740 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-10-13 11:09:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:09:36,740 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 11:09:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:36,741 INFO L225 Difference]: With dead ends: 114 [2020-10-13 11:09:36,741 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 11:09:36,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:09:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 11:09:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-13 11:09:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 11:09:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 11:09:36,746 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-13 11:09:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:36,746 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 11:09:36,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:09:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 11:09:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:09:36,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:36,747 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:36,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:09:36,748 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:36,748 INFO L82 PathProgramCache]: Analyzing trace with hash -679577427, now seen corresponding path program 22 times [2020-10-13 11:09:36,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:36,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22028455] [2020-10-13 11:09:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:37,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:09:42,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5252 [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:09:42,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:42,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:42,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22028455] [2020-10-13 11:09:42,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:42,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:09:42,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444467559] [2020-10-13 11:09:42,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:09:42,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:09:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:09:42,577 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 26 states. [2020-10-13 11:09:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:43,487 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-10-13 11:09:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:09:43,488 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-13 11:09:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:43,489 INFO L225 Difference]: With dead ends: 118 [2020-10-13 11:09:43,489 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 11:09:43,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:09:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 11:09:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-13 11:09:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:09:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 11:09:43,495 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-13 11:09:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:43,496 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 11:09:43,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:09:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 11:09:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:09:43,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:43,496 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:43,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:09:43,497 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 462626827, now seen corresponding path program 23 times [2020-10-13 11:09:43,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:43,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808005824] [2020-10-13 11:09:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:48,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:48,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:09:48,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:09:48,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5203 [2020-10-13 11:09:48,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:09:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:09:48,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:49,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:49,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808005824] [2020-10-13 11:09:49,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:49,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:09:49,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049447337] [2020-10-13 11:09:49,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:09:49,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:49,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:09:49,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:09:49,309 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 27 states. [2020-10-13 11:09:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:50,349 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-10-13 11:09:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:09:50,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-13 11:09:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:50,351 INFO L225 Difference]: With dead ends: 122 [2020-10-13 11:09:50,351 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 11:09:50,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:09:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 11:09:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-13 11:09:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 11:09:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 11:09:50,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-13 11:09:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:50,357 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 11:09:50,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:09:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 11:09:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 11:09:50,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:50,358 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:50,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:09:50,359 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1390712855, now seen corresponding path program 24 times [2020-10-13 11:09:50,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:50,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257727137] [2020-10-13 11:09:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:55,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:09:55,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:55,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-13 11:09:55,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:55,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:09:55,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:09:55,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:09:55,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:56,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:56,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:56,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:09:56,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:56,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257727137] [2020-10-13 11:09:56,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:56,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:09:56,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812515904] [2020-10-13 11:09:56,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:09:56,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:09:56,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:09:56,218 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 28 states. [2020-10-13 11:09:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:57,327 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-10-13 11:09:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:09:57,328 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-13 11:09:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:57,330 INFO L225 Difference]: With dead ends: 126 [2020-10-13 11:09:57,330 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 11:09:57,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:09:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 11:09:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-13 11:09:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 11:09:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 11:09:57,337 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-13 11:09:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:57,337 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 11:09:57,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:09:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 11:09:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 11:09:57,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:57,338 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:57,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:09:57,338 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash -38719417, now seen corresponding path program 25 times [2020-10-13 11:09:57,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:57,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105155264] [2020-10-13 11:09:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:58,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:10:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:10:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 11:10:02,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:10:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:10:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:03,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:03,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:03,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:03,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105155264] [2020-10-13 11:10:03,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:03,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:10:03,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491691566] [2020-10-13 11:10:03,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:10:03,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:03,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:10:03,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:10:03,133 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 29 states. [2020-10-13 11:10:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:04,338 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2020-10-13 11:10:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:10:04,340 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-13 11:10:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:04,341 INFO L225 Difference]: With dead ends: 130 [2020-10-13 11:10:04,341 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 11:10:04,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:10:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 11:10:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-13 11:10:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 11:10:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 11:10:04,348 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-13 11:10:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:04,348 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 11:10:04,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:10:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 11:10:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 11:10:04,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:04,349 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:04,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:10:04,349 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2146851109, now seen corresponding path program 26 times [2020-10-13 11:10:04,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:04,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548480886] [2020-10-13 11:10:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:05,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:09,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:09,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 11:10:09,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:09,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-13 11:10:09,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:10:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:10:09,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:10,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:10,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:10,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:10,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:10,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548480886] [2020-10-13 11:10:10,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:10,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:10:10,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497701742] [2020-10-13 11:10:10,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:10:10,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:10:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:10:10,322 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 30 states. [2020-10-13 11:10:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:11,631 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-10-13 11:10:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:10:11,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-13 11:10:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:11,633 INFO L225 Difference]: With dead ends: 134 [2020-10-13 11:10:11,633 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 11:10:11,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:10:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 11:10:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-13 11:10:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 11:10:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 11:10:11,639 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-13 11:10:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:11,640 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 11:10:11,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:10:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 11:10:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 11:10:11,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:11,641 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:11,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 11:10:11,641 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2053848445, now seen corresponding path program 27 times [2020-10-13 11:10:11,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:11,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322695816] [2020-10-13 11:10:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:17,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:17,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5384 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:10:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:17,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:17,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:17,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:17,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322695816] [2020-10-13 11:10:17,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:17,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:10:17,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424116622] [2020-10-13 11:10:17,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:10:17,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:10:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:10:17,856 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 31 states. [2020-10-13 11:10:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:19,224 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-10-13 11:10:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:10:19,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-13 11:10:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:19,225 INFO L225 Difference]: With dead ends: 138 [2020-10-13 11:10:19,225 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 11:10:19,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:10:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 11:10:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-13 11:10:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 11:10:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 11:10:19,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-13 11:10:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:19,232 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 11:10:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:10:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 11:10:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 11:10:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:19,233 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:19,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 11:10:19,234 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1656861599, now seen corresponding path program 28 times [2020-10-13 11:10:19,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:19,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523975974] [2020-10-13 11:10:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:24,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 11:10:24,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:24,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5213 [2020-10-13 11:10:24,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:24,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:10:24,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:24,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 11:10:24,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:25,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:25,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:25,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:25,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523975974] [2020-10-13 11:10:25,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:25,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:10:25,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616268412] [2020-10-13 11:10:25,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:10:25,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:10:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:10:25,417 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 32 states. [2020-10-13 11:10:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:26,965 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-10-13 11:10:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:10:26,966 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-13 11:10:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:26,967 INFO L225 Difference]: With dead ends: 142 [2020-10-13 11:10:26,967 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 11:10:26,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:10:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 11:10:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-10-13 11:10:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 11:10:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 11:10:26,973 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-13 11:10:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:26,973 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 11:10:26,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:10:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 11:10:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 11:10:26,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:26,974 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:26,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 11:10:26,974 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1890375359, now seen corresponding path program 29 times [2020-10-13 11:10:26,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:26,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974022725] [2020-10-13 11:10:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 11:10:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:32,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:32,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:32,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:32,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:32,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:32,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974022725] [2020-10-13 11:10:32,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:32,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:10:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592129352] [2020-10-13 11:10:32,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:10:32,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:10:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:10:32,959 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 33 states. [2020-10-13 11:10:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:34,651 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2020-10-13 11:10:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:10:34,652 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-13 11:10:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:34,653 INFO L225 Difference]: With dead ends: 146 [2020-10-13 11:10:34,653 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 11:10:34,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:10:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 11:10:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-13 11:10:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 11:10:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 11:10:34,661 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-10-13 11:10:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:34,661 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 11:10:34,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:10:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 11:10:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 11:10:34,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:34,663 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:34,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 11:10:34,663 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:34,663 INFO L82 PathProgramCache]: Analyzing trace with hash 581058973, now seen corresponding path program 30 times [2020-10-13 11:10:34,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:34,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858262066] [2020-10-13 11:10:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:40,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5466 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 11:10:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:41,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:41,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:41,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:41,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858262066] [2020-10-13 11:10:41,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:41,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:10:41,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255412170] [2020-10-13 11:10:41,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:10:41,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:10:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:10:41,082 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 34 states. [2020-10-13 11:10:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:42,827 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2020-10-13 11:10:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:10:42,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-13 11:10:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:42,828 INFO L225 Difference]: With dead ends: 150 [2020-10-13 11:10:42,828 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 11:10:42,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:10:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 11:10:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-13 11:10:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 11:10:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 11:10:42,836 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-10-13 11:10:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:42,836 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 11:10:42,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:10:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 11:10:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 11:10:42,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:42,837 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:42,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 11:10:42,838 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash 753429755, now seen corresponding path program 31 times [2020-10-13 11:10:42,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:42,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662650669] [2020-10-13 11:10:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:42,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5364 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 11:10:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:49,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:49,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:49,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662650669] [2020-10-13 11:10:49,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:49,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 11:10:49,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969169118] [2020-10-13 11:10:49,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 11:10:49,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:49,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 11:10:49,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:10:49,280 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 35 states. [2020-10-13 11:10:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:51,184 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2020-10-13 11:10:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 11:10:51,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-13 11:10:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:51,190 INFO L225 Difference]: With dead ends: 154 [2020-10-13 11:10:51,190 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 11:10:51,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:10:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 11:10:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-13 11:10:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 11:10:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 11:10:51,197 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-10-13 11:10:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:51,198 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 11:10:51,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 11:10:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 11:10:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 11:10:51,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:51,199 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:51,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 11:10:51,200 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1101973287, now seen corresponding path program 32 times [2020-10-13 11:10:51,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:51,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582945973] [2020-10-13 11:10:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:56,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5455 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 11:10:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:57,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:57,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:57,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:57,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:57,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:57,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582945973] [2020-10-13 11:10:57,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:57,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:10:57,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107109586] [2020-10-13 11:10:57,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:10:57,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:10:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:10:57,729 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 36 states. [2020-10-13 11:10:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:59,670 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2020-10-13 11:10:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:10:59,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-13 11:10:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:59,672 INFO L225 Difference]: With dead ends: 158 [2020-10-13 11:10:59,672 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 11:10:59,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:10:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 11:10:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 11:10:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 11:10:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 11:10:59,679 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-10-13 11:10:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:59,680 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 11:10:59,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:10:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 11:10:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 11:10:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:59,681 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:59,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 11:10:59,681 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1732868809, now seen corresponding path program 33 times [2020-10-13 11:10:59,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:59,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291068097] [2020-10-13 11:10:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:06,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7197 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 11:11:06,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:08,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:08,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:08,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:08,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:08,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:08,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:08,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:08,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291068097] [2020-10-13 11:11:08,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:08,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 11:11:08,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340165941] [2020-10-13 11:11:08,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 11:11:08,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 11:11:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:11:08,054 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 37 states. [2020-10-13 11:11:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:10,045 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2020-10-13 11:11:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:11:10,047 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-13 11:11:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:10,047 INFO L225 Difference]: With dead ends: 162 [2020-10-13 11:11:10,047 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 11:11:10,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:11:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 11:11:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-10-13 11:11:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 11:11:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 11:11:10,053 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2020-10-13 11:11:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:10,053 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 11:11:10,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 11:11:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 11:11:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 11:11:10,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:10,054 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:10,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 11:11:10,054 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890581, now seen corresponding path program 34 times [2020-10-13 11:11:10,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:10,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417009783] [2020-10-13 11:11:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5646 [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:15,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 11:11:15,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:11:15,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 11:11:15,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:16,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:16,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:16,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417009783] [2020-10-13 11:11:16,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:16,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:11:16,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49026340] [2020-10-13 11:11:16,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:11:16,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:11:16,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:11:16,948 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2020-10-13 11:11:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:19,173 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2020-10-13 11:11:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:11:19,177 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-13 11:11:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:19,178 INFO L225 Difference]: With dead ends: 166 [2020-10-13 11:11:19,178 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 11:11:19,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:11:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 11:11:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-13 11:11:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 11:11:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 11:11:19,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2020-10-13 11:11:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:19,185 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 11:11:19,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:11:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 11:11:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 11:11:19,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:19,187 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:19,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 11:11:19,187 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1023008909, now seen corresponding path program 35 times [2020-10-13 11:11:19,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:19,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653250136] [2020-10-13 11:11:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:19,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 11:11:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6909 [2020-10-13 11:11:26,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:11:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:11:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 11:11:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:27,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:27,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:27,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653250136] [2020-10-13 11:11:27,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:27,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 11:11:27,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711590115] [2020-10-13 11:11:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 11:11:27,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 11:11:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:11:27,571 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 39 states. [2020-10-13 11:11:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:29,864 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2020-10-13 11:11:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 11:11:29,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-13 11:11:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:29,866 INFO L225 Difference]: With dead ends: 170 [2020-10-13 11:11:29,866 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 11:11:29,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:11:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 11:11:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-13 11:11:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 11:11:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 11:11:29,874 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2020-10-13 11:11:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:29,874 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 11:11:29,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 11:11:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 11:11:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 11:11:29,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:29,875 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:29,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 11:11:29,875 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1137454417, now seen corresponding path program 36 times [2020-10-13 11:11:29,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:29,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965922919] [2020-10-13 11:11:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:29,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:34,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:35,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5534 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:11:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 11:11:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:36,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:36,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:36,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:36,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:36,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965922919] [2020-10-13 11:11:36,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:11:36,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:11:36,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67781633] [2020-10-13 11:11:36,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:11:36,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:11:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:11:36,769 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 40 states.