/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-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:59:56,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:59:56,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:59:57,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:59:57,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:59:57,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:59:57,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:59:57,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:59:57,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:59:57,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:59:57,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:59:57,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:59:57,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:59:57,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:59:57,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:59:57,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:59:57,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:59:57,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:59:57,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:59:57,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:59:57,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:59:57,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:59:57,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:59:57,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:59:57,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:59:57,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:59:57,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:59:57,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:59:57,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:59:57,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:59:57,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:59:57,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:59:57,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:59:57,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:59:57,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:59:57,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:59:57,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:59:57,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:59:57,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:59:57,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:59:57,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:59:57,077 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 10:59:57,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:59:57,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:59:57,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:59:57,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:59:57,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:59:57,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:59:57,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:59:57,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:59:57,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:59:57,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:59:57,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:59:57,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:59:57,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:59:57,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:59:57,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:59:57,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:59:57,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:59:57,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:59:57,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:59:57,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:59:57,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:59:57,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:57,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:59:57,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:59:57,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:59:57,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:59:57,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:59:57,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:59:57,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:59:57,129 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 10:59:57,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:59:57,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:59:57,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:59:57,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:59:57,432 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:59:57,433 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-13 10:59:57,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2837b8f7/a44b8063670c4a9eb50c0d48612fba8e/FLAGe2cb2f049 [2020-10-13 10:59:57,933 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:59:57,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-13 10:59:57,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2837b8f7/a44b8063670c4a9eb50c0d48612fba8e/FLAGe2cb2f049 [2020-10-13 10:59:58,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2837b8f7/a44b8063670c4a9eb50c0d48612fba8e [2020-10-13 10:59:58,371 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:59:58,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:59:58,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:58,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:59:58,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:59:58,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d587f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58, skipping insertion in model container [2020-10-13 10:59:58,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:59:58,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:59:58,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:58,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:59:58,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:58,595 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:59:58,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58 WrapperNode [2020-10-13 10:59:58,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:58,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:59:58,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:59:58,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:59:58,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (1/1) ... [2020-10-13 10:59:58,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:59:58,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:59:58,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:59:58,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:59:58,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (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 10:59:58,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:59:58,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:59:58,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:59:58,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:59:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:59:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:59:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:59:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:59:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:59:58,973 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:59:58,974 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:59:58,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:58 BoogieIcfgContainer [2020-10-13 10:59:58,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:59:58,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:59:58,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:59:58,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:59:58,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:58" (1/3) ... [2020-10-13 10:59:58,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:58, skipping insertion in model container [2020-10-13 10:59:58,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:58" (2/3) ... [2020-10-13 10:59:58,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:58, skipping insertion in model container [2020-10-13 10:59:58,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:58" (3/3) ... [2020-10-13 10:59:58,987 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-10-13 10:59:58,999 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:59:59,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:59:59,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:59:59,064 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:59:59,065 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:59:59,065 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:59:59,065 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:59:59,065 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:59:59,066 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:59:59,066 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:59:59,066 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:59:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 10:59:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:59,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,097 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-13 10:59:59,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468057981] [2020-10-13 10:59:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:59,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:59,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-13 10:59:59,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:59,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:59,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:59:59,526 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 10:59:59,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468057981] [2020-10-13 10:59:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:59,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:59:59,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110208552] [2020-10-13 10:59:59,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:59:59,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:59:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:59,559 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-13 10:59:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:59,593 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 10:59:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:59:59,595 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:59:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:59,607 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:59:59,609 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:59:59,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:59:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:59:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:59:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 10:59:59,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 10:59:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:59,674 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 10:59:59,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:59:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 10:59:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:59,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:59:59,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-10-13 10:59:59,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921252616] [2020-10-13 10:59:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:59,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:59,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-13 10:59:59,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:59,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:00,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:00,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:00:00,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:00,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:00:00,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921252616] [2020-10-13 11:00:00,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:00:00,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:00:00,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576471338] [2020-10-13 11:00:00,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:00:00,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:00:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:00:00,014 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-13 11:00:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:00,044 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 11:00:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:00:00,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 11:00:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:00,046 INFO L225 Difference]: With dead ends: 21 [2020-10-13 11:00:00,046 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 11:00:00,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 11:00:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 11:00:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-13 11:00:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 11:00:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 11:00:00,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 11:00:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:00,053 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 11:00:00,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:00:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 11:00:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 11:00:00,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:00,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:00,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:00:00,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-10-13 11:00:00,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:00,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280914633] [2020-10-13 11:00:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:00:00,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-13 11:00:00,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:00,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:00:00,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:00,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:00:00,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:00,279 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 11:00:00,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280914633] [2020-10-13 11:00:00,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:00:00,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:00:00,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104505931] [2020-10-13 11:00:00,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:00:00,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:00:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:00:00,282 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 11:00:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:00,304 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-13 11:00:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:00:00,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 11:00:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:00,306 INFO L225 Difference]: With dead ends: 24 [2020-10-13 11:00:00,306 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 11:00:00,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 11:00:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 11:00:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 11:00:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 11:00:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 11:00:00,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 11:00:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:00,313 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 11:00:00,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:00:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 11:00:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 11:00:00,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:00,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:00,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:00:00,315 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-10-13 11:00:00,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:00,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656602396] [2020-10-13 11:00:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:00:00,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:00,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-13 11:00:00,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:00:00,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:00,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:00:00,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:00,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:00,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:00,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:00:00,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:00,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:00,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:00,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:00:00,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656602396] [2020-10-13 11:00:00,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:00,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 11:00:00,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692161860] [2020-10-13 11:00:00,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:00:00,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:00:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:00:00,676 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 11:00:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:00,728 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 11:00:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:00:00,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 11:00:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:00,730 INFO L225 Difference]: With dead ends: 24 [2020-10-13 11:00:00,730 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 11:00:00,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:00:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 11:00:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-13 11:00:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 11:00:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 11:00:00,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-13 11:00:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:00,747 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 11:00:00,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:00:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 11:00:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 11:00:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:00,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:00,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:00:00,749 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1575207660, now seen corresponding path program 1 times [2020-10-13 11:00:00,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:00,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543509011] [2020-10-13 11:00:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:00:01,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:01,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-13 11:00:01,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:00:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:00:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:01,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:01,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:01,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:01,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:00:01,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543509011] [2020-10-13 11:00:01,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:01,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 11:00:01,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690900037] [2020-10-13 11:00:01,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:00:01,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:00:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:00:01,095 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-13 11:00:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:01,126 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-13 11:00:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:00:01,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 11:00:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:01,127 INFO L225 Difference]: With dead ends: 27 [2020-10-13 11:00:01,127 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 11:00:01,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:00:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 11:00:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-13 11:00:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 11:00:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 11:00:01,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-13 11:00:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:01,134 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 11:00:01,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:00:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 11:00:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 11:00:01,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:01,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:01,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:00:01,135 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2020-10-13 11:00:01,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:01,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561299882] [2020-10-13 11:00:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:00:01,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:01,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-13 11:00:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:00:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:00:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:01,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:01,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:01,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:01,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:00:01,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561299882] [2020-10-13 11:00:01,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:01,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:00:01,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171963905] [2020-10-13 11:00:01,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:00:01,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:00:01,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:00:01,477 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-13 11:00:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:01,519 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-13 11:00:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:00:01,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 11:00:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:01,520 INFO L225 Difference]: With dead ends: 27 [2020-10-13 11:00:01,520 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 11:00:01,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 11:00:01,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 11:00:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-13 11:00:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 11:00:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 11:00:01,526 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-13 11:00:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:01,527 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 11:00:01,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:00:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 11:00:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 11:00:01,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:01,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:01,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:00:01,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1075985333, now seen corresponding path program 2 times [2020-10-13 11:00:01,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:01,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568036470] [2020-10-13 11:00:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:00:01,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:00:01,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-13 11:00:01,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:00:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:00:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:01,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:01,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:01,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:01,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:01,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:01,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:00:01,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568036470] [2020-10-13 11:00:01,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:01,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:00:01,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664525139] [2020-10-13 11:00:01,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:00:01,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:00:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:00:01,930 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-13 11:00:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:01,966 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-13 11:00:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:00:01,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 11:00:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:01,967 INFO L225 Difference]: With dead ends: 30 [2020-10-13 11:00:01,968 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 11:00:01,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 11:00:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 11:00:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 11:00:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 11:00:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 11:00:01,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-13 11:00:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:01,974 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 11:00:01,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:00:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 11:00:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 11:00:01,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:01,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:01,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:00:01,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2020-10-13 11:00:01,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:01,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261224213] [2020-10-13 11:00:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:02,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:00:02,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:00:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-13 11:00:02,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:00:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:00:02,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:02,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:02,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:02,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:02,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:02,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:02,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:02,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261224213] [2020-10-13 11:00:02,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:02,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:00:02,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900369810] [2020-10-13 11:00:02,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:00:02,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:02,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:00:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:02,466 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-13 11:00:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:02,646 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 11:00:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:00:02,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 11:00:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:02,648 INFO L225 Difference]: With dead ends: 34 [2020-10-13 11:00:02,648 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:00:02,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:00:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 11:00:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 11:00:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 11:00:02,654 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-10-13 11:00:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:02,655 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 11:00:02,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:00:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 11:00:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 11:00:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:02,656 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:02,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:00:02,656 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1392210665, now seen corresponding path program 3 times [2020-10-13 11:00:02,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:02,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972415243] [2020-10-13 11:00:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:04,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:00:04,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:00:04,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2023 [2020-10-13 11:00:04,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:00:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:00:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:04,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:04,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:04,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:04,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:04,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972415243] [2020-10-13 11:00:04,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:04,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:00:04,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849991301] [2020-10-13 11:00:04,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:00:04,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:04,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:00:04,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:04,787 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-10-13 11:00:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:04,843 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-13 11:00:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:00:04,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 11:00:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:04,845 INFO L225 Difference]: With dead ends: 43 [2020-10-13 11:00:04,845 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 11:00:04,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:00:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 11:00:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 11:00:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:00:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 11:00:04,852 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-13 11:00:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:04,852 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 11:00:04,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:00:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 11:00:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:00:04,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:04,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:04,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:00:04,854 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2062781546, now seen corresponding path program 4 times [2020-10-13 11:00:04,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:04,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302969555] [2020-10-13 11:00:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:04,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:00:07,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:00:07,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-10-13 11:00:07,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:00:07,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:07,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:00:07,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:07,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:07,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:07,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302969555] [2020-10-13 11:00:07,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:07,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:00:07,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547295368] [2020-10-13 11:00:07,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:00:07,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:00:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:00:07,729 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-13 11:00:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:07,808 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-13 11:00:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:00:07,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 11:00:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:07,810 INFO L225 Difference]: With dead ends: 46 [2020-10-13 11:00:07,811 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:00:07,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:00:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:00:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 11:00:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:00:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 11:00:07,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-10-13 11:00:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:07,818 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 11:00:07,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:00:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 11:00:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 11:00:07,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:07,819 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:07,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:00:07,820 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1147963575, now seen corresponding path program 5 times [2020-10-13 11:00:07,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:07,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873940935] [2020-10-13 11:00:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:11,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 11:00:11,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:00:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3288 [2020-10-13 11:00:11,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:00:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:00:11,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:11,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:11,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:11,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:11,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:11,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:11,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873940935] [2020-10-13 11:00:11,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:11,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:00:11,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804406885] [2020-10-13 11:00:11,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:00:11,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:11,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:00:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:11,217 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-10-13 11:00:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:11,313 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-13 11:00:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:00:11,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 11:00:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:11,314 INFO L225 Difference]: With dead ends: 49 [2020-10-13 11:00:11,314 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:00:11,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:00:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 11:00:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:00:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 11:00:11,321 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-13 11:00:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:11,321 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 11:00:11,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:00:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 11:00:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:00:11,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:11,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:11,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:00:11,323 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:11,323 INFO L82 PathProgramCache]: Analyzing trace with hash -760785930, now seen corresponding path program 6 times [2020-10-13 11:00:11,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:11,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578137845] [2020-10-13 11:00:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:11,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:14,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:14,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:00:14,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:00:14,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3526 [2020-10-13 11:00:14,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:14,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:00:14,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:14,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:00:14,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:14,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:14,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:14,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:14,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:14,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:14,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578137845] [2020-10-13 11:00:14,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:14,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:00:14,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778378214] [2020-10-13 11:00:14,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:00:14,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:00:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:14,972 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-10-13 11:00:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:15,084 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-13 11:00:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:00:15,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 11:00:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:15,086 INFO L225 Difference]: With dead ends: 52 [2020-10-13 11:00:15,086 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 11:00:15,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 11:00:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 11:00:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:00:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 11:00:15,092 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-13 11:00:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:15,093 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 11:00:15,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:00:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 11:00:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:00:15,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:15,094 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:15,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:00:15,095 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1049709655, now seen corresponding path program 7 times [2020-10-13 11:00:15,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:15,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864746239] [2020-10-13 11:00:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:20,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:00:20,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:00:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:00:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:00:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:00:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:20,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:20,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:20,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:20,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:20,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:20,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:20,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:20,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:20,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:20,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:20,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864746239] [2020-10-13 11:00:20,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:20,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:00:20,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049663615] [2020-10-13 11:00:20,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:00:20,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:20,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:00:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:20,296 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-13 11:00:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:20,467 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-13 11:00:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:00:20,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-13 11:00:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:20,471 INFO L225 Difference]: With dead ends: 55 [2020-10-13 11:00:20,471 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 11:00:20,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 11:00:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 11:00:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:00:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 11:00:20,485 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-13 11:00:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:20,489 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 11:00:20,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:00:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 11:00:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:00:20,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:20,494 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:20,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:00:20,495 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1324379222, now seen corresponding path program 8 times [2020-10-13 11:00:20,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:20,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448562562] [2020-10-13 11:00:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:23,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:25,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:00:25,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:25,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:25,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:25,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:25,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:25,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:25,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448562562] [2020-10-13 11:00:25,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:25,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:00:25,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193756340] [2020-10-13 11:00:25,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:00:25,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:25,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:00:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:25,656 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2020-10-13 11:00:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:25,812 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-13 11:00:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:00:25,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-13 11:00:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:25,814 INFO L225 Difference]: With dead ends: 58 [2020-10-13 11:00:25,814 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:00:25,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:00:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 11:00:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:00:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 11:00:25,820 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-13 11:00:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:25,820 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 11:00:25,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:00:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 11:00:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:00:25,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:25,821 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:25,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:00:25,822 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2092750839, now seen corresponding path program 9 times [2020-10-13 11:00:25,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:25,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028935785] [2020-10-13 11:00:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:30,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:00:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:30,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:00:30,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:30,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:30,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:30,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:30,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:30,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028935785] [2020-10-13 11:00:30,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:30,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:00:30,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985369585] [2020-10-13 11:00:30,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:00:30,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:00:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:00:30,991 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-10-13 11:00:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:31,201 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-13 11:00:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:00:31,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 11:00:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:31,202 INFO L225 Difference]: With dead ends: 61 [2020-10-13 11:00:31,202 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 11:00:31,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:00:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 11:00:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 11:00:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:00:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 11:00:31,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-13 11:00:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:31,215 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 11:00:31,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:00:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 11:00:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:00:31,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:31,216 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:31,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:00:31,216 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash 475905206, now seen corresponding path program 10 times [2020-10-13 11:00:31,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:31,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754098734] [2020-10-13 11:00:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:31,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:36,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:00:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:36,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:36,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:36,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:36,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:36,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754098734] [2020-10-13 11:00:36,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:36,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:00:36,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793699246] [2020-10-13 11:00:36,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:00:36,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:00:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:00:36,447 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 13 states. [2020-10-13 11:00:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:36,728 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-13 11:00:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:00:36,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 11:00:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:36,729 INFO L225 Difference]: With dead ends: 64 [2020-10-13 11:00:36,729 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:00:36,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:00:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:00:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 11:00:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 11:00:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 11:00:36,739 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-13 11:00:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:36,739 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 11:00:36,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:00:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 11:00:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:00:36,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:36,741 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:36,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:00:36,741 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1085877143, now seen corresponding path program 11 times [2020-10-13 11:00:36,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:36,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427785560] [2020-10-13 11:00:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:36,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:41,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:00:41,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 11:00:41,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:41,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:41,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:00:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:00:41,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:41,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:41,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:41,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:41,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:41,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427785560] [2020-10-13 11:00:41,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:41,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:00:41,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911109482] [2020-10-13 11:00:41,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:00:41,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:00:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:41,977 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2020-10-13 11:00:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:42,268 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-13 11:00:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:00:42,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-13 11:00:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:42,269 INFO L225 Difference]: With dead ends: 67 [2020-10-13 11:00:42,269 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 11:00:42,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 11:00:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 11:00:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:00:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 11:00:42,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-13 11:00:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:42,279 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 11:00:42,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:00:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 11:00:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:00:42,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:42,280 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:42,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:00:42,280 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:42,280 INFO L82 PathProgramCache]: Analyzing trace with hash 753222934, now seen corresponding path program 12 times [2020-10-13 11:00:42,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:42,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180004702] [2020-10-13 11:00:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:42,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:43,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:00:47,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:47,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:47,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:47,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:47,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:47,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:47,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180004702] [2020-10-13 11:00:47,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:47,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:00:47,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761636593] [2020-10-13 11:00:47,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:00:47,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:00:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:00:47,527 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 15 states. [2020-10-13 11:00:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:47,886 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-13 11:00:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:00:47,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-13 11:00:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:47,889 INFO L225 Difference]: With dead ends: 70 [2020-10-13 11:00:47,889 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:00:47,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:00:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:00:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 11:00:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 11:00:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 11:00:47,904 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-13 11:00:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:47,905 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 11:00:47,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:00:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 11:00:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:00:47,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:47,906 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:47,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:00:47,907 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -858765513, now seen corresponding path program 13 times [2020-10-13 11:00:47,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:47,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973930024] [2020-10-13 11:00:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:52,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:00:52,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:00:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:53,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:53,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973930024] [2020-10-13 11:00:53,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:53,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:00:53,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649489512] [2020-10-13 11:00:53,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:00:53,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:00:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:00:53,190 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2020-10-13 11:00:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:53,621 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-13 11:00:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:00:53,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-13 11:00:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:53,624 INFO L225 Difference]: With dead ends: 73 [2020-10-13 11:00:53,624 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 11:00:53,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:00:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 11:00:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 11:00:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 11:00:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 11:00:53,631 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-13 11:00:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:53,631 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 11:00:53,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:00:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 11:00:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:00:53,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:53,632 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:53,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:00:53,633 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1577253514, now seen corresponding path program 14 times [2020-10-13 11:00:53,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:53,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459766872] [2020-10-13 11:00:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:00:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 11:00:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:58,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:58,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:58,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459766872] [2020-10-13 11:00:58,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:58,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:00:58,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086920183] [2020-10-13 11:00:58,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:00:58,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:00:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:00:58,911 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-10-13 11:00:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:59,387 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-13 11:00:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:00:59,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-13 11:00:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:59,389 INFO L225 Difference]: With dead ends: 76 [2020-10-13 11:00:59,389 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 11:00:59,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:00:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 11:00:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 11:00:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:00:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 11:00:59,396 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-13 11:00:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:59,397 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 11:00:59,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:00:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 11:00:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:00:59,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:59,398 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:59,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:00:59,398 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash 63711959, now seen corresponding path program 15 times [2020-10-13 11:00:59,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:59,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356720852] [2020-10-13 11:00:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:04,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:01:04,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:01:04,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:01:04,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:01:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:01:04,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:04,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:04,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:04,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:04,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:04,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 78 proven. 345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:04,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356720852] [2020-10-13 11:01:04,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:04,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:01:04,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278608645] [2020-10-13 11:01:04,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:01:04,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:01:04,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:01:04,701 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-10-13 11:01:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:05,245 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-13 11:01:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 11:01:05,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-13 11:01:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:05,247 INFO L225 Difference]: With dead ends: 79 [2020-10-13 11:01:05,247 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 11:01:05,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:01:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 11:01:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 11:01:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 11:01:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 11:01:05,254 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-13 11:01:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:05,254 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 11:01:05,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:01:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 11:01:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 11:01:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:05,255 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:05,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:01:05,255 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash 748355030, now seen corresponding path program 16 times [2020-10-13 11:01:05,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:05,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599041970] [2020-10-13 11:01:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:05,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:06,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:06,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:07,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:07,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 11:01:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:10,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:10,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:10,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:10,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 83 proven. 392 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:10,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599041970] [2020-10-13 11:01:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:01:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904748979] [2020-10-13 11:01:10,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:01:10,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:01:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:01:10,576 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2020-10-13 11:01:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:11,183 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-10-13 11:01:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:01:11,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-13 11:01:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:11,188 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:01:11,188 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 11:01:11,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:01:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 11:01:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 11:01:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 11:01:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 11:01:11,194 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-13 11:01:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:11,195 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 11:01:11,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:01:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 11:01:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 11:01:11,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:11,196 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:11,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:01:11,196 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 150394487, now seen corresponding path program 17 times [2020-10-13 11:01:11,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:11,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415825178] [2020-10-13 11:01:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:11,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:16,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 11:01:16,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 11:01:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:01:16,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:16,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:01:16,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:16,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:01:16,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:16,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:16,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:16,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415825178] [2020-10-13 11:01:16,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:16,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:01:16,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907621225] [2020-10-13 11:01:16,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:01:16,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:01:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:01:16,621 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2020-10-13 11:01:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:17,264 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-13 11:01:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:01:17,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-13 11:01:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:17,265 INFO L225 Difference]: With dead ends: 85 [2020-10-13 11:01:17,265 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 11:01:17,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:01:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 11:01:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 11:01:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 11:01:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 11:01:17,272 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-13 11:01:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:17,272 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 11:01:17,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:01:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 11:01:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 11:01:17,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:17,273 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:17,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:01:17,273 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1832201782, now seen corresponding path program 18 times [2020-10-13 11:01:17,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:17,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088755759] [2020-10-13 11:01:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:17,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 11:01:22,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:22,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:22,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:22,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 93 proven. 495 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:22,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088755759] [2020-10-13 11:01:22,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:22,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:01:22,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927898882] [2020-10-13 11:01:22,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:01:22,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:22,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:01:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:01:22,674 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 21 states. [2020-10-13 11:01:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:23,411 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-13 11:01:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:01:23,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-13 11:01:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:23,414 INFO L225 Difference]: With dead ends: 88 [2020-10-13 11:01:23,414 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 11:01:23,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:01:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 11:01:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 11:01:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 11:01:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 11:01:23,425 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-13 11:01:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:23,426 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 11:01:23,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:01:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 11:01:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 11:01:23,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:23,428 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:23,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:01:23,430 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash -535148009, now seen corresponding path program 19 times [2020-10-13 11:01:23,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:23,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338635527] [2020-10-13 11:01:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:23,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:28,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 11:01:28,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:28,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:01:28,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:28,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:01:28,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:28,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 11:01:28,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:28,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 98 proven. 551 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:28,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338635527] [2020-10-13 11:01:28,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:28,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:01:28,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664396056] [2020-10-13 11:01:28,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:01:28,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:01:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:01:28,855 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-10-13 11:01:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:29,645 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-13 11:01:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:01:29,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-13 11:01:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:29,646 INFO L225 Difference]: With dead ends: 91 [2020-10-13 11:01:29,646 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 11:01:29,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:01:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 11:01:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 11:01:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 11:01:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 11:01:29,654 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-13 11:01:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:29,654 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 11:01:29,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:01:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 11:01:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 11:01:29,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:29,655 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:29,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:01:29,656 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1405195926, now seen corresponding path program 20 times [2020-10-13 11:01:29,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:29,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967384558] [2020-10-13 11:01:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:29,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:29,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:32,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:32,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:34,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:34,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 11:01:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 11:01:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:34,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:01:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 11:01:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:35,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:35,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:35,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:35,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:35,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 103 proven. 610 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:35,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967384558] [2020-10-13 11:01:35,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:35,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:01:35,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576145354] [2020-10-13 11:01:35,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:01:35,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:35,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:01:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:01:35,114 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2020-10-13 11:01:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:35,989 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-10-13 11:01:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:01:35,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-13 11:01:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:35,991 INFO L225 Difference]: With dead ends: 94 [2020-10-13 11:01:35,991 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 11:01:35,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:01:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 11:01:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 11:01:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 11:01:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 11:01:35,997 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-13 11:01:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:35,997 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 11:01:35,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:01:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 11:01:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 11:01:35,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:35,997 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:35,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:01:35,998 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash 226526647, now seen corresponding path program 21 times [2020-10-13 11:01:35,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:35,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040077433] [2020-10-13 11:01:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:41,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 11:01:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:41,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:41,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:41,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:41,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:41,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:41,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:41,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:41,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 108 proven. 672 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:41,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040077433] [2020-10-13 11:01:41,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:41,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:01:41,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790550480] [2020-10-13 11:01:41,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:01:41,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:01:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:01:41,487 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 24 states. [2020-10-13 11:01:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:42,432 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-13 11:01:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:01:42,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-13 11:01:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:42,434 INFO L225 Difference]: With dead ends: 97 [2020-10-13 11:01:42,434 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 11:01:42,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:01:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 11:01:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 11:01:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:01:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 11:01:42,441 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-13 11:01:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:42,442 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 11:01:42,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:01:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 11:01:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 11:01:42,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:42,443 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:42,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:01:42,443 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2142648054, now seen corresponding path program 22 times [2020-10-13 11:01:42,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:42,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230157951] [2020-10-13 11:01:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:42,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 11:01:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:47,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 113 proven. 737 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:47,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230157951] [2020-10-13 11:01:47,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:47,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:01:47,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388732943] [2020-10-13 11:01:47,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:01:47,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:01:47,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:01:47,979 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 25 states. [2020-10-13 11:01:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:49,036 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-13 11:01:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:01:49,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 82 [2020-10-13 11:01:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:49,038 INFO L225 Difference]: With dead ends: 100 [2020-10-13 11:01:49,038 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 11:01:49,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:01:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 11:01:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 11:01:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 11:01:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 11:01:49,044 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-13 11:01:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:49,044 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 11:01:49,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:01:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 11:01:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 11:01:49,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:49,045 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:49,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:01:49,046 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 905152855, now seen corresponding path program 23 times [2020-10-13 11:01:49,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:49,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109468208] [2020-10-13 11:01:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:54,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 11:01:54,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:54,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:54,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 118 proven. 805 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:54,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109468208] [2020-10-13 11:01:54,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:54,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:01:54,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628585535] [2020-10-13 11:01:54,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:01:54,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:01:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:01:54,656 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2020-10-13 11:01:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:55,800 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-13 11:01:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:01:55,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-10-13 11:01:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:55,802 INFO L225 Difference]: With dead ends: 103 [2020-10-13 11:01:55,802 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 11:01:55,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:01:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 11:01:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 11:01:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 11:01:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-13 11:01:55,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-13 11:01:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:55,809 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-13 11:01:55,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:01:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-13 11:01:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 11:01:55,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:55,809 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:55,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:01:55,810 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1610018986, now seen corresponding path program 24 times [2020-10-13 11:01:55,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:55,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729770319] [2020-10-13 11:01:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:55,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:02:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:00,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 11:02:00,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:02,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:02,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:02,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:02,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:02,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:02,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:02,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:02:02,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729770319] [2020-10-13 11:02:02,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:02,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:02:02,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044786181] [2020-10-13 11:02:02,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:02:02,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:02:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:02:02,274 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 29 states. [2020-10-13 11:02:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:03,952 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-13 11:02:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:02:03,953 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-10-13 11:02:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:03,954 INFO L225 Difference]: With dead ends: 114 [2020-10-13 11:02:03,954 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 11:02:03,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:02:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 11:02:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-10-13 11:02:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 11:02:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 11:02:03,967 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 88 [2020-10-13 11:02:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:03,968 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 11:02:03,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:02:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 11:02:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 11:02:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:03,970 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:03,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 11:02:03,971 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -508082187, now seen corresponding path program 25 times [2020-10-13 11:02:03,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:03,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680003873] [2020-10-13 11:02:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:08,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:08,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:08,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 11:02:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:09,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:09,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:09,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:09,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:09,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:09,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 197 proven. 876 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 11:02:09,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680003873] [2020-10-13 11:02:09,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:09,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:02:09,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045139126] [2020-10-13 11:02:09,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:02:09,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:02:09,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:02:09,597 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 27 states. [2020-10-13 11:02:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:10,853 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2020-10-13 11:02:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:02:10,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 91 [2020-10-13 11:02:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:10,857 INFO L225 Difference]: With dead ends: 106 [2020-10-13 11:02:10,857 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 11:02:10,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:02:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 11:02:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 11:02:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 11:02:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-13 11:02:10,866 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 91 [2020-10-13 11:02:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:10,866 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-13 11:02:10,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:02:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-13 11:02:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 11:02:10,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:10,867 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:10,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 11:02:10,870 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1094888201, now seen corresponding path program 26 times [2020-10-13 11:02:10,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:10,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755054538] [2020-10-13 11:02:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:15,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:15,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:15,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 11:02:15,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:02:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:02:15,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:02:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 11:02:15,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:16,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:16,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:16,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 950 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:16,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755054538] [2020-10-13 11:02:16,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:16,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:02:16,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774514665] [2020-10-13 11:02:16,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:02:16,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:02:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:02:16,496 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 28 states. [2020-10-13 11:02:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:17,874 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-13 11:02:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:02:17,875 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-13 11:02:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:17,876 INFO L225 Difference]: With dead ends: 109 [2020-10-13 11:02:17,876 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 11:02:17,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:02:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 11:02:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 11:02:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 11:02:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-13 11:02:17,884 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2020-10-13 11:02:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:17,885 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-13 11:02:17,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:02:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-13 11:02:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 11:02:17,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:17,886 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:17,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 11:02:17,886 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash -751820874, now seen corresponding path program 27 times [2020-10-13 11:02:17,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:17,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31465871] [2020-10-13 11:02:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:19,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:20,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:21,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:22,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:22,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 11:02:22,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 11:02:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:23,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:23,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 133 proven. 1027 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:23,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31465871] [2020-10-13 11:02:23,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:23,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:02:23,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202932202] [2020-10-13 11:02:23,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:02:23,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:02:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:02:23,575 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 29 states. [2020-10-13 11:02:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:25,054 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-13 11:02:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:02:25,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 94 [2020-10-13 11:02:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:25,056 INFO L225 Difference]: With dead ends: 112 [2020-10-13 11:02:25,056 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 11:02:25,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:02:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 11:02:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 11:02:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 11:02:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-13 11:02:25,064 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 94 [2020-10-13 11:02:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:25,065 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-13 11:02:25,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:02:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-13 11:02:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 11:02:25,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:25,066 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:25,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 11:02:25,066 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1839720599, now seen corresponding path program 28 times [2020-10-13 11:02:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:25,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189001052] [2020-10-13 11:02:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:26,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:26,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:26,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:27,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:27,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:29,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:30,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:30,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 11:02:30,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 11:02:30,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:30,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:30,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:30,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 138 proven. 1107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:30,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189001052] [2020-10-13 11:02:30,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:30,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:02:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319119907] [2020-10-13 11:02:30,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:02:30,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:02:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:02:30,793 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 30 states. [2020-10-13 11:02:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:32,377 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-13 11:02:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:02:32,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2020-10-13 11:02:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:32,379 INFO L225 Difference]: With dead ends: 115 [2020-10-13 11:02:32,379 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 11:02:32,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:02:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 11:02:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 11:02:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 11:02:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-13 11:02:32,386 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2020-10-13 11:02:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:32,386 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-13 11:02:32,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:02:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-13 11:02:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 11:02:32,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:32,387 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:32,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 11:02:32,387 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 119629846, now seen corresponding path program 29 times [2020-10-13 11:02:32,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:32,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910884479] [2020-10-13 11:02:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:32,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:37,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 11:02:37,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:38,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:38,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:38,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:38,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:38,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:38,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:38,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:38,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 143 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:38,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910884479] [2020-10-13 11:02:38,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:38,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:02:38,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575885432] [2020-10-13 11:02:38,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:02:38,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:38,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:02:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:02:38,161 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 31 states. [2020-10-13 11:02:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:39,885 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-10-13 11:02:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:02:39,886 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 100 [2020-10-13 11:02:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:39,887 INFO L225 Difference]: With dead ends: 118 [2020-10-13 11:02:39,887 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 11:02:39,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:02:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 11:02:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 11:02:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 11:02:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-13 11:02:39,896 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 100 [2020-10-13 11:02:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:39,896 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-13 11:02:39,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:02:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-13 11:02:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 11:02:39,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:39,898 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:39,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 11:02:39,898 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash 150815799, now seen corresponding path program 30 times [2020-10-13 11:02:39,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:39,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570824454] [2020-10-13 11:02:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:44,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:44,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 11:02:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:45,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:45,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:45,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:45,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:45,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 148 proven. 1276 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:45,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570824454] [2020-10-13 11:02:45,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:45,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:02:45,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515732918] [2020-10-13 11:02:45,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:02:45,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:02:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:02:45,724 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 32 states. [2020-10-13 11:02:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:47,561 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-10-13 11:02:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:02:47,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-10-13 11:02:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:47,564 INFO L225 Difference]: With dead ends: 121 [2020-10-13 11:02:47,564 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 11:02:47,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:02:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 11:02:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-13 11:02:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 11:02:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-13 11:02:47,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 103 [2020-10-13 11:02:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:47,573 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-13 11:02:47,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:02:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-13 11:02:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 11:02:47,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:47,575 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:47,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 11:02:47,575 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1498605686, now seen corresponding path program 31 times [2020-10-13 11:02:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:47,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693867205] [2020-10-13 11:02:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:52,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:52,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 11:02:52,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 11:02:52,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:53,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:53,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 153 proven. 1365 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:02:53,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693867205] [2020-10-13 11:02:53,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:53,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:02:53,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661117321] [2020-10-13 11:02:53,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:02:53,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:53,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:02:53,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:53,469 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 33 states. [2020-10-13 11:02:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:55,400 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-10-13 11:02:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:02:55,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-10-13 11:02:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:55,404 INFO L225 Difference]: With dead ends: 124 [2020-10-13 11:02:55,404 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 11:02:55,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 11:02:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 11:02:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 11:02:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-13 11:02:55,414 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 106 [2020-10-13 11:02:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:55,414 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-13 11:02:55,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:02:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-13 11:02:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 11:02:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:55,416 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:55,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 11:02:55,416 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -142121001, now seen corresponding path program 32 times [2020-10-13 11:02:55,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:55,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937535418] [2020-10-13 11:02:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:55,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:57,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:00,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 11:03:00,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 11:03:00,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:03:00,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:03:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 11:03:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:01,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:01,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:01,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 158 proven. 1457 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:01,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937535418] [2020-10-13 11:03:01,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:01,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:03:01,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571922264] [2020-10-13 11:03:01,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:03:01,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:03:01,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:03:01,347 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 34 states. [2020-10-13 11:03:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:03,450 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-13 11:03:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:03:03,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 109 [2020-10-13 11:03:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:03,452 INFO L225 Difference]: With dead ends: 127 [2020-10-13 11:03:03,452 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 11:03:03,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:03:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 11:03:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 11:03:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 11:03:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-13 11:03:03,461 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 109 [2020-10-13 11:03:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:03,462 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-13 11:03:03,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:03:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-13 11:03:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 11:03:03,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:03,463 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:03,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 11:03:03,463 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1991942358, now seen corresponding path program 33 times [2020-10-13 11:03:03,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:03,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697619245] [2020-10-13 11:03:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:03,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:05,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:05,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:05,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:07,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:08,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:08,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 11:03:08,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 11:03:08,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:03:08,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:08,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 11:03:08,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:08,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 11:03:08,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:09,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:09,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:09,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:09,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:09,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:09,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:09,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:09,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 163 proven. 1552 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:09,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697619245] [2020-10-13 11:03:09,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:09,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 11:03:09,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258315403] [2020-10-13 11:03:09,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 11:03:09,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 11:03:09,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:03:09,472 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 35 states. [2020-10-13 11:03:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:11,689 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2020-10-13 11:03:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:03:11,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 112 [2020-10-13 11:03:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:11,691 INFO L225 Difference]: With dead ends: 130 [2020-10-13 11:03:11,691 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 11:03:11,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:03:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 11:03:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 11:03:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 11:03:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-13 11:03:11,700 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2020-10-13 11:03:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:11,701 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-13 11:03:11,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 11:03:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-13 11:03:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 11:03:11,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:11,702 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:11,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 11:03:11,702 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:11,703 INFO L82 PathProgramCache]: Analyzing trace with hash -527412361, now seen corresponding path program 34 times [2020-10-13 11:03:11,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:11,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939256174] [2020-10-13 11:03:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:15,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:15,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:16,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 11:03:16,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:17,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:17,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:17,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:17,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:17,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:17,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:17,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 168 proven. 1650 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:17,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939256174] [2020-10-13 11:03:17,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:17,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:03:17,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359738902] [2020-10-13 11:03:17,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:03:17,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:03:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:03:17,728 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 36 states. [2020-10-13 11:03:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:20,087 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-13 11:03:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 11:03:20,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 115 [2020-10-13 11:03:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:20,089 INFO L225 Difference]: With dead ends: 133 [2020-10-13 11:03:20,089 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 11:03:20,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:03:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 11:03:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-13 11:03:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 11:03:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-13 11:03:20,098 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 115 [2020-10-13 11:03:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:20,098 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-13 11:03:20,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:03:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-13 11:03:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 11:03:20,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:20,100 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:20,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 11:03:20,100 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -70348490, now seen corresponding path program 35 times [2020-10-13 11:03:20,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:20,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905261926] [2020-10-13 11:03:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:20,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:21,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:21,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 11:03:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 11:03:25,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:26,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:26,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 173 proven. 1751 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:26,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905261926] [2020-10-13 11:03:26,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:26,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 11:03:26,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401186476] [2020-10-13 11:03:26,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 11:03:26,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 11:03:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:03:26,180 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 37 states. [2020-10-13 11:03:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:28,704 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2020-10-13 11:03:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:03:28,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 118 [2020-10-13 11:03:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:28,706 INFO L225 Difference]: With dead ends: 136 [2020-10-13 11:03:28,706 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 11:03:28,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:03:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 11:03:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 11:03:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 11:03:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-13 11:03:28,716 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2020-10-13 11:03:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:28,716 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-13 11:03:28,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 11:03:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-13 11:03:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 11:03:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:28,717 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:28,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 11:03:28,717 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1273104151, now seen corresponding path program 36 times [2020-10-13 11:03:28,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:28,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093163429] [2020-10-13 11:03:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:29,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:29,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:03:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 11:03:33,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:34,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:34,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:34,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:34,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:34,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:34,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 178 proven. 1855 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:34,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093163429] [2020-10-13 11:03:34,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:34,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:03:34,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75278366] [2020-10-13 11:03:34,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:03:34,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:34,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:03:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:03:34,890 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 38 states. [2020-10-13 11:03:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:37,546 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-10-13 11:03:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:03:37,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 121 [2020-10-13 11:03:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:37,548 INFO L225 Difference]: With dead ends: 139 [2020-10-13 11:03:37,548 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 11:03:37,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:03:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 11:03:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 11:03:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 11:03:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-13 11:03:37,557 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 121 [2020-10-13 11:03:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:37,558 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-13 11:03:37,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:03:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-13 11:03:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 11:03:37,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:37,559 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:37,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 11:03:37,559 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash -729499242, now seen corresponding path program 37 times [2020-10-13 11:03:37,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:37,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106188022] [2020-10-13 11:03:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:37,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:38,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:38,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:39,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:40,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:41,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:42,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:42,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 11:03:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:43,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:43,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:43,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:43,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:43,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:43,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:43,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:43,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:43,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:43,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:43,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 183 proven. 1962 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:43,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106188022] [2020-10-13 11:03:43,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:43,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 11:03:43,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667795082] [2020-10-13 11:03:43,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 11:03:43,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 11:03:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:43,781 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 39 states. [2020-10-13 11:03:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:46,621 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-10-13 11:03:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:03:46,625 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 124 [2020-10-13 11:03:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:46,626 INFO L225 Difference]: With dead ends: 142 [2020-10-13 11:03:46,627 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 11:03:46,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 11:03:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 11:03:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 11:03:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-13 11:03:46,635 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 124 [2020-10-13 11:03:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:46,636 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-13 11:03:46,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 11:03:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-13 11:03:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 11:03:46,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:46,637 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:46,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 11:03:46,637 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1103528631, now seen corresponding path program 38 times [2020-10-13 11:03:46,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:46,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130302642] [2020-10-13 11:03:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:46,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:48,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:50,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:51,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 11:03:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:52,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:52,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:52,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:52,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:52,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:52,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:52,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 188 proven. 2072 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:03:52,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130302642] [2020-10-13 11:03:52,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:52,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:03:52,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407167554] [2020-10-13 11:03:52,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:03:52,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:03:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:52,937 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 40 states. [2020-10-13 11:03:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:55,918 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-13 11:03:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 11:03:55,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-10-13 11:03:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:55,920 INFO L225 Difference]: With dead ends: 145 [2020-10-13 11:03:55,920 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 11:03:55,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 11:03:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-13 11:03:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 11:03:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-13 11:03:55,928 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2020-10-13 11:03:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:55,929 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-13 11:03:55,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:03:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-13 11:03:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 11:03:55,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:55,930 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:55,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 11:03:55,931 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1672275466, now seen corresponding path program 39 times [2020-10-13 11:03:55,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:55,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868375332] [2020-10-13 11:03:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking...