/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/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:54:24,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:54:24,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:54:24,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:54:24,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:54:24,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:54:24,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:54:24,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:54:24,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:54:24,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:54:24,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:54:24,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:54:24,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:54:25,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:54:25,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:54:25,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:54:25,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:54:25,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:54:25,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:54:25,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:54:25,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:54:25,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:54:25,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:54:25,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:54:25,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:54:25,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:54:25,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:54:25,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:54:25,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:54:25,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:54:25,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:54:25,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:54:25,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:54:25,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:54:25,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:54:25,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:54:25,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:54:25,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:54:25,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:54:25,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:54:25,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:54:25,059 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 04:54:25,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:54:25,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:54:25,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:54:25,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:54:25,103 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:54:25,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:54:25,104 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:54:25,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:54:25,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:54:25,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:54:25,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:54:25,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:54:25,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:54:25,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:54:25,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:54:25,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:54:25,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:54:25,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:54:25,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:54:25,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:54:25,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:54:25,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:54:25,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:54:25,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:54:25,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:54:25,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:54:25,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:54:25,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:54:25,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:54:25,109 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 04:54:25,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:54:25,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:54:25,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:54:25,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:54:25,466 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:54:25,467 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-13 04:54:25,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8d79a3cc/3c085060d71c435aa85103e2a62d095e/FLAGa47f106f0 [2020-10-13 04:54:25,942 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:54:25,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-13 04:54:25,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8d79a3cc/3c085060d71c435aa85103e2a62d095e/FLAGa47f106f0 [2020-10-13 04:54:26,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8d79a3cc/3c085060d71c435aa85103e2a62d095e [2020-10-13 04:54:26,316 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:54:26,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:54:26,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:26,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:54:26,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:54:26,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722dc2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26, skipping insertion in model container [2020-10-13 04:54:26,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:54:26,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:54:26,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:26,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:54:26,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:26,587 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:54:26,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26 WrapperNode [2020-10-13 04:54:26,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:26,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:54:26,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:54:26,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:54:26,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (1/1) ... [2020-10-13 04:54:26,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:54:26,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:54:26,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:54:26,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:54:26,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (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 04:54:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:54:26,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:54:26,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:54:26,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:54:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:54:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:54:26,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:54:27,005 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:54:27,005 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:54:27,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:27 BoogieIcfgContainer [2020-10-13 04:54:27,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:54:27,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:54:27,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:54:27,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:54:27,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:54:26" (1/3) ... [2020-10-13 04:54:27,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146cf167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:27, skipping insertion in model container [2020-10-13 04:54:27,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:26" (2/3) ... [2020-10-13 04:54:27,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146cf167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:27, skipping insertion in model container [2020-10-13 04:54:27,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:27" (3/3) ... [2020-10-13 04:54:27,017 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2020-10-13 04:54:27,027 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:54:27,033 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:54:27,046 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:54:27,068 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:54:27,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:54:27,068 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:54:27,069 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:54:27,069 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:54:27,069 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:54:27,069 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:54:27,069 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:54:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-13 04:54:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:54:27,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:27,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:27,097 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2020-10-13 04:54:27,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:27,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291668757] [2020-10-13 04:54:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:27,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:54:27,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 04:54:27,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 04:54:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:54:27,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:27,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:27,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:54:27,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:27,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:27,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:27,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:27,444 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 04:54:27,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291668757] [2020-10-13 04:54:27,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:27,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:54:27,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699389413] [2020-10-13 04:54:27,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:54:27,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:54:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:27,474 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-13 04:54:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:27,675 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 04:54:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:54:27,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:54:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:27,686 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:54:27,687 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:54:27,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:54:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 04:54:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:54:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 04:54:27,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-10-13 04:54:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:27,726 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 04:54:27,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:54:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 04:54:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:54:27,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:27,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:27,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:54:27,728 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2020-10-13 04:54:27,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:27,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299134163] [2020-10-13 04:54:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:27,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:27,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:54:27,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:27,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-13 04:54:27,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:27,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:27,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:27,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:27,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:27,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:27,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:54:27,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:27,946 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 04:54:27,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299134163] [2020-10-13 04:54:27,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:27,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:27,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640086096] [2020-10-13 04:54:27,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:27,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:27,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:27,951 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-13 04:54:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:28,017 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-13 04:54:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:28,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:54:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:28,018 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:54:28,019 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:54:28,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:54:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:54:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:54:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 04:54:28,027 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-10-13 04:54:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:28,028 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 04:54:28,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 04:54:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:54:28,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:28,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:28,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:54:28,030 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2020-10-13 04:54:28,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:28,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182077009] [2020-10-13 04:54:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:28,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:54:28,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:28,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 04:54:28,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:28,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:28,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:54:28,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:28,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:54:28,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:28,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:28,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:54:28,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:54:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182077009] [2020-10-13 04:54:28,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:28,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:28,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575648288] [2020-10-13 04:54:28,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:28,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:28,301 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 04:54:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:28,387 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 04:54:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:28,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:54:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:28,389 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:54:28,390 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:54:28,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:54:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 04:54:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:54:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:54:28,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 04:54:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:28,404 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:54:28,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:54:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:54:28,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:28,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:28,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:54:28,406 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2020-10-13 04:54:28,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:28,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210754665] [2020-10-13 04:54:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:28,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:28,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:54:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-13 04:54:28,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:54:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:28,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:28,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:28,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:28,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:28,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:28,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:28,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:28,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:54:28,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210754665] [2020-10-13 04:54:28,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:28,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:29,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338622054] [2020-10-13 04:54:29,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:29,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:29,001 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 04:54:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:29,074 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:54:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:29,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:54:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:29,076 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:54:29,076 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:54:29,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:54:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 04:54:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:54:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 04:54:29,084 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2020-10-13 04:54:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:29,084 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 04:54:29,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 04:54:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:54:29,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:29,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:29,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:54:29,087 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash -392904637, now seen corresponding path program 2 times [2020-10-13 04:54:29,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:29,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408530706] [2020-10-13 04:54:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:29,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:54:29,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:29,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-13 04:54:29,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:54:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:54:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:29,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:29,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:29,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:29,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:29,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:54:29,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408530706] [2020-10-13 04:54:29,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:29,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:29,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036137365] [2020-10-13 04:54:29,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:29,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:29,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:29,713 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 04:54:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:29,783 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-13 04:54:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:29,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:54:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:29,785 INFO L225 Difference]: With dead ends: 43 [2020-10-13 04:54:29,785 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:54:29,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:54:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-13 04:54:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:54:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 04:54:29,792 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-13 04:54:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:29,793 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 04:54:29,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 04:54:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:54:29,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:29,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:29,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:54:29,795 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1510721175, now seen corresponding path program 3 times [2020-10-13 04:54:29,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:29,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760553918] [2020-10-13 04:54:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:29,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:54:30,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:54:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:30,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:30,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:30,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:30,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:54:30,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760553918] [2020-10-13 04:54:30,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:30,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:30,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601722397] [2020-10-13 04:54:30,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:30,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:30,520 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 04:54:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:30,606 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-13 04:54:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:30,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:54:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:30,608 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:54:30,608 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:54:30,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:54:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:54:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:54:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:54:30,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-13 04:54:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:30,615 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:54:30,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:54:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:54:30,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:30,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:30,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:54:30,617 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1100015481, now seen corresponding path program 4 times [2020-10-13 04:54:30,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:30,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924628753] [2020-10-13 04:54:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:31,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:54:31,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:31,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-13 04:54:31,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:31,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:31,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:54:31,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:31,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:31,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:31,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:31,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:31,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:31,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:54:31,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924628753] [2020-10-13 04:54:31,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:31,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:31,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724108391] [2020-10-13 04:54:31,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:31,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:31,630 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 04:54:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:31,695 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-13 04:54:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:31,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:54:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:31,697 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:54:31,697 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:54:31,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:54:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-13 04:54:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:54:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 04:54:31,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 27 [2020-10-13 04:54:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:31,704 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 04:54:31,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 04:54:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:54:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:31,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:31,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:54:31,706 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash -235287899, now seen corresponding path program 5 times [2020-10-13 04:54:31,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:31,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420453147] [2020-10-13 04:54:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:33,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:33,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:54:33,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:33,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-13 04:54:33,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:33,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:33,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:33,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:33,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:33,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:33,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:54:33,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:54:33,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420453147] [2020-10-13 04:54:33,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:33,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941434118] [2020-10-13 04:54:33,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:33,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:33,166 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-13 04:54:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:33,259 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 04:54:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:33,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:54:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:33,261 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:54:33,261 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:54:33,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:54:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 04:54:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:54:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 04:54:33,271 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 04:54:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:33,271 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 04:54:33,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 04:54:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:54:33,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:33,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:33,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:54:33,277 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash -777802169, now seen corresponding path program 6 times [2020-10-13 04:54:33,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:33,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301191046] [2020-10-13 04:54:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:33,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:34,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:34,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:54:34,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-13 04:54:34,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:54:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:35,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:35,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:35,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:35,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:35,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:54:35,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301191046] [2020-10-13 04:54:35,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:35,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:35,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406975888] [2020-10-13 04:54:35,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:35,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:35,030 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-13 04:54:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:35,131 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-13 04:54:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:35,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 04:54:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:35,134 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:54:35,134 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:54:35,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:54:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 04:54:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:54:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-13 04:54:35,145 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 32 [2020-10-13 04:54:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:35,145 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-13 04:54:35,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-13 04:54:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:54:35,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:35,147 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:35,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:54:35,147 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1851994473, now seen corresponding path program 7 times [2020-10-13 04:54:35,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:35,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367548495] [2020-10-13 04:54:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:54:37,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:37,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-13 04:54:37,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:54:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:54:37,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:37,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:37,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:37,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:54:37,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367548495] [2020-10-13 04:54:37,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:37,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:37,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669183652] [2020-10-13 04:54:37,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:37,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:37,554 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2020-10-13 04:54:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:37,635 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-13 04:54:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:37,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-13 04:54:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:37,636 INFO L225 Difference]: With dead ends: 55 [2020-10-13 04:54:37,636 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:54:37,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:54:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 04:54:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:54:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 04:54:37,642 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-10-13 04:54:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:37,643 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 04:54:37,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 04:54:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:54:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:37,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:37,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:54:37,645 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash -657101181, now seen corresponding path program 8 times [2020-10-13 04:54:37,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:37,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825746942] [2020-10-13 04:54:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:54:40,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2446 [2020-10-13 04:54:40,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:54:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:40,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:40,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:40,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:40,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:40,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:54:40,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825746942] [2020-10-13 04:54:40,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:40,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:40,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158429220] [2020-10-13 04:54:40,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:40,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:40,188 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 9 states. [2020-10-13 04:54:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:40,284 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-13 04:54:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:40,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:54:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:40,286 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:54:40,286 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:54:40,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:54:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:54:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:54:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-13 04:54:40,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2020-10-13 04:54:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:40,296 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-13 04:54:40,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-13 04:54:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:54:40,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:40,298 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:40,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:54:40,299 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash 542412961, now seen corresponding path program 9 times [2020-10-13 04:54:40,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:40,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56417534] [2020-10-13 04:54:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:43,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:54:43,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3209 [2020-10-13 04:54:43,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:54:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:54:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:43,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:43,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:43,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:43,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:43,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:43,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:54:43,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56417534] [2020-10-13 04:54:43,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:43,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:43,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314162233] [2020-10-13 04:54:43,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:43,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:43,598 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-13 04:54:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:43,687 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 04:54:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:43,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 04:54:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:43,689 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:54:43,689 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:54:43,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:54:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 04:54:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:54:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 04:54:43,703 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2020-10-13 04:54:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:43,704 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 04:54:43,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 04:54:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:54:43,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:43,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:43,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:54:43,707 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1082991691, now seen corresponding path program 10 times [2020-10-13 04:54:43,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:43,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727705886] [2020-10-13 04:54:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:54:46,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-13 04:54:46,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:46,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:46,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:54:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:46,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:46,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:46,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:46,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:54:46,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727705886] [2020-10-13 04:54:46,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:46,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:46,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856045776] [2020-10-13 04:54:46,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:46,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:46,985 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-13 04:54:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:47,124 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-13 04:54:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:47,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:54:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:47,126 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:54:47,126 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:54:47,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:54:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 04:54:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:54:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-13 04:54:47,137 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 42 [2020-10-13 04:54:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:47,137 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-13 04:54:47,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-13 04:54:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:54:47,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:47,139 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:47,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:54:47,143 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 140813549, now seen corresponding path program 11 times [2020-10-13 04:54:47,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:47,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795116102] [2020-10-13 04:54:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:50,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:54:50,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3484 [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:54:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:50,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:50,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:50,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:50,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:50,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:50,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:50,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:54:50,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795116102] [2020-10-13 04:54:50,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:50,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:54:50,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804386341] [2020-10-13 04:54:50,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:54:50,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:54:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:50,738 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-10-13 04:54:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:50,829 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-13 04:54:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:54:50,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 04:54:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:50,831 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:54:50,831 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:54:50,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:54:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 04:54:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 04:54:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-13 04:54:50,836 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 44 [2020-10-13 04:54:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:50,837 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-13 04:54:50,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:54:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-13 04:54:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:54:50,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:50,838 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:50,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:54:50,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 945718543, now seen corresponding path program 12 times [2020-10-13 04:54:50,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:50,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341368700] [2020-10-13 04:54:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:53,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:54:53,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3093 [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:54:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:54,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:54:54,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341368700] [2020-10-13 04:54:54,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:54,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:54,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986186357] [2020-10-13 04:54:54,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:54,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:54,014 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-10-13 04:54:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:54,090 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-13 04:54:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:54,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-13 04:54:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:54,092 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:54:54,092 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:54:54,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:54:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-13 04:54:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:54:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-13 04:54:54,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 46 [2020-10-13 04:54:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:54,103 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-13 04:54:54,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-13 04:54:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:54:54,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:54,104 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:54,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:54:54,105 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1358909155, now seen corresponding path program 13 times [2020-10-13 04:54:54,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:54,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764599911] [2020-10-13 04:54:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:54,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:57,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:54:57,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3430 [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:54:57,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:57,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:57,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:57,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:57,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:57,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:54:57,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764599911] [2020-10-13 04:54:57,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:57,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:54:57,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142392733] [2020-10-13 04:54:57,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:54:57,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:54:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:57,646 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 12 states. [2020-10-13 04:54:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:57,748 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-13 04:54:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:54:57,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 04:54:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:57,750 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:54:57,750 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:54:57,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:54:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:54:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:54:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-13 04:54:57,755 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 49 [2020-10-13 04:54:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:57,756 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-13 04:54:57,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:54:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-13 04:54:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:54:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:57,757 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:57,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:54:57,757 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 171415099, now seen corresponding path program 14 times [2020-10-13 04:54:57,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:57,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087214271] [2020-10-13 04:54:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:57,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:02,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:55:02,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4393 [2020-10-13 04:55:02,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:55:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:55:02,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:02,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:02,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:02,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:55:02,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087214271] [2020-10-13 04:55:02,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:02,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:55:02,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914996564] [2020-10-13 04:55:02,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:55:02,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:55:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:02,274 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 13 states. [2020-10-13 04:55:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:02,348 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-13 04:55:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:55:02,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 04:55:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:02,350 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:55:02,350 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:55:02,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:55:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:55:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:55:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-13 04:55:02,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 51 [2020-10-13 04:55:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:02,355 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-13 04:55:02,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:55:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-13 04:55:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:55:02,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:02,356 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:02,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:55:02,356 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1934207961, now seen corresponding path program 15 times [2020-10-13 04:55:02,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:02,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227732593] [2020-10-13 04:55:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:06,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:06,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:55:06,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:06,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4493 [2020-10-13 04:55:06,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:06,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:55:06,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:55:06,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:55:06,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:06,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:06,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:06,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:06,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:06,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:06,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:06,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:06,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:06,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:06,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:55:06,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227732593] [2020-10-13 04:55:06,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:06,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:55:06,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628046487] [2020-10-13 04:55:06,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:55:06,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:55:06,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:55:06,939 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 10 states. [2020-10-13 04:55:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:07,036 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-13 04:55:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:55:07,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-13 04:55:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:07,037 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:55:07,037 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 04:55:07,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:55:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 04:55:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-13 04:55:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:55:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 04:55:07,041 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 53 [2020-10-13 04:55:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:07,042 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 04:55:07,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:55:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 04:55:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:55:07,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:07,043 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:07,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:55:07,043 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:07,043 INFO L82 PathProgramCache]: Analyzing trace with hash 433561107, now seen corresponding path program 16 times [2020-10-13 04:55:07,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:07,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736701295] [2020-10-13 04:55:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:12,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:55:12,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:12,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:55:12,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:12,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:12,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:12,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:12,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:12,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:12,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:12,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:12,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:55:12,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736701295] [2020-10-13 04:55:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:12,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691091712] [2020-10-13 04:55:12,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:12,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:12,226 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 14 states. [2020-10-13 04:55:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:12,366 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2020-10-13 04:55:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:55:12,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 04:55:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:12,368 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:55:12,368 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:55:12,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:55:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 04:55:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:55:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-13 04:55:12,379 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 56 [2020-10-13 04:55:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:12,379 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-13 04:55:12,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:55:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-13 04:55:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:55:12,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:12,380 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:12,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:55:12,381 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1869110069, now seen corresponding path program 17 times [2020-10-13 04:55:12,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:12,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097728759] [2020-10-13 04:55:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:12,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:55:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:17,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:17,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:17,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:17,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:17,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:17,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:55:17,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097728759] [2020-10-13 04:55:17,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:17,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:55:17,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235574766] [2020-10-13 04:55:17,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:55:17,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:55:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:55:17,481 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 11 states. [2020-10-13 04:55:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:17,660 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-13 04:55:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:55:17,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-13 04:55:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:17,662 INFO L225 Difference]: With dead ends: 79 [2020-10-13 04:55:17,662 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:55:17,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:55:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:55:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-13 04:55:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:55:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-13 04:55:17,672 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 58 [2020-10-13 04:55:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:17,673 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-13 04:55:17,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:55:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-13 04:55:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:55:17,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:17,677 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:17,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:55:17,677 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1867488969, now seen corresponding path program 18 times [2020-10-13 04:55:17,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:17,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087821908] [2020-10-13 04:55:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:22,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:55:22,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:55:22,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:55:22,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:22,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:22,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:22,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:22,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:22,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:55:22,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087821908] [2020-10-13 04:55:22,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:22,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:22,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048182465] [2020-10-13 04:55:22,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:22,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:22,848 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 15 states. [2020-10-13 04:55:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:22,986 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-13 04:55:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:22,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-13 04:55:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:22,988 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:55:22,988 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:55:22,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:55:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:55:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:55:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 04:55:22,997 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 61 [2020-10-13 04:55:22,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:22,997 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 04:55:22,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 04:55:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:55:22,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:22,999 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:23,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:55:23,000 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:23,000 INFO L82 PathProgramCache]: Analyzing trace with hash -216889003, now seen corresponding path program 19 times [2020-10-13 04:55:23,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:23,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55783501] [2020-10-13 04:55:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:23,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:24,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:28,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:55:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:28,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:55:28,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55783501] [2020-10-13 04:55:28,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:28,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:55:28,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203184787] [2020-10-13 04:55:28,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:55:28,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:55:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:28,117 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-13 04:55:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:28,253 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-13 04:55:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:55:28,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-13 04:55:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:28,257 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:55:28,257 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:55:28,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:55:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:55:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-13 04:55:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:55:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-13 04:55:28,265 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 63 [2020-10-13 04:55:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:28,265 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-13 04:55:28,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:55:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-13 04:55:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:55:28,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:28,266 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:28,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:55:28,266 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1984037097, now seen corresponding path program 20 times [2020-10-13 04:55:28,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:28,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068994451] [2020-10-13 04:55:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:28,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:29,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:33,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:55:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:33,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:33,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:33,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:33,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:33,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:33,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:55:33,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068994451] [2020-10-13 04:55:33,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:33,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:33,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018553523] [2020-10-13 04:55:33,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:33,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:33,438 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 16 states. [2020-10-13 04:55:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:33,558 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-13 04:55:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:33,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 04:55:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:33,560 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:55:33,560 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:55:33,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:55:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 04:55:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:55:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-13 04:55:33,564 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 66 [2020-10-13 04:55:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:33,564 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-13 04:55:33,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-13 04:55:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:55:33,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:33,565 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:33,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:55:33,566 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash -911853127, now seen corresponding path program 21 times [2020-10-13 04:55:33,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:33,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999391268] [2020-10-13 04:55:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:33,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:55:38,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:38,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:38,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:38,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:38,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:55:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999391268] [2020-10-13 04:55:38,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:38,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:55:38,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673156895] [2020-10-13 04:55:38,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:55:38,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:55:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:38,745 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 17 states. [2020-10-13 04:55:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:38,853 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-13 04:55:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:55:38,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 04:55:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:38,854 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:55:38,854 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:55:38,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:55:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 04:55:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:55:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-13 04:55:38,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 68 [2020-10-13 04:55:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:38,858 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-13 04:55:38,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:55:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-13 04:55:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:55:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:38,859 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:38,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:55:38,860 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1335208997, now seen corresponding path program 22 times [2020-10-13 04:55:38,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:38,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757009066] [2020-10-13 04:55:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:38,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:43,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:55:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:43,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:43,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:43,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:43,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:43,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 04:55:43,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757009066] [2020-10-13 04:55:43,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:43,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:55:43,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269416934] [2020-10-13 04:55:43,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:55:43,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:55:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:43,984 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2020-10-13 04:55:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:44,074 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-13 04:55:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:55:44,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-13 04:55:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:44,075 INFO L225 Difference]: With dead ends: 91 [2020-10-13 04:55:44,075 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:55:44,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:55:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:55:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-13 04:55:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:55:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-13 04:55:44,080 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 70 [2020-10-13 04:55:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:44,080 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-13 04:55:44,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:55:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-13 04:55:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:55:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:44,081 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:44,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:55:44,081 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1793663279, now seen corresponding path program 23 times [2020-10-13 04:55:44,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:44,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026025672] [2020-10-13 04:55:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:46,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:49,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:49,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:55:49,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:49,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:55:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:55:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:49,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:49,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:55:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026025672] [2020-10-13 04:55:49,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:49,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:55:49,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415116877] [2020-10-13 04:55:49,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:55:49,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:55:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:49,278 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 18 states. [2020-10-13 04:55:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:49,381 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2020-10-13 04:55:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:55:49,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-13 04:55:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:49,382 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:55:49,383 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:55:49,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:55:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:55:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:55:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-13 04:55:49,387 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 73 [2020-10-13 04:55:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:49,387 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-13 04:55:49,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:55:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-13 04:55:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:55:49,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:49,389 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:49,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:55:49,389 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -522728977, now seen corresponding path program 24 times [2020-10-13 04:55:49,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:49,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392840272] [2020-10-13 04:55:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:49,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:54,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:55:54,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:54,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:54,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:55:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:55:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:54,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:54,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:54,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:55:54,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392840272] [2020-10-13 04:55:54,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:54,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:55:54,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244657466] [2020-10-13 04:55:54,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:55:54,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:55:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:54,628 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 19 states. [2020-10-13 04:55:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:54,773 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2020-10-13 04:55:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:55:54,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2020-10-13 04:55:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:54,775 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:55:54,775 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:55:54,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:55:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 04:55:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:55:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-10-13 04:55:54,782 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 75 [2020-10-13 04:55:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:54,783 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-10-13 04:55:54,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:55:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-10-13 04:55:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:55:54,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:54,785 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:54,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:55:54,785 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1074423181, now seen corresponding path program 25 times [2020-10-13 04:55:54,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:54,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954469639] [2020-10-13 04:55:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:59,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:55:59,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:59,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:59,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:55:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:55:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:59,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:59,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:59,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:59,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:55:59,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954469639] [2020-10-13 04:55:59,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:59,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:59,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507681819] [2020-10-13 04:55:59,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:59,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:59,940 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 14 states. [2020-10-13 04:56:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:00,086 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-13 04:56:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:56:00,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-13 04:56:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:00,088 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:56:00,088 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:56:00,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:56:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:56:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-13 04:56:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:56:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-13 04:56:00,093 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 77 [2020-10-13 04:56:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:00,093 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-13 04:56:00,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:56:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-13 04:56:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:56:00,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:00,094 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:00,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:56:00,095 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1770133471, now seen corresponding path program 26 times [2020-10-13 04:56:00,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:00,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12147968] [2020-10-13 04:56:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:56:05,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:05,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:05,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:56:05,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12147968] [2020-10-13 04:56:05,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:05,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:56:05,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796016854] [2020-10-13 04:56:05,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:56:05,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:56:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:56:05,322 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 20 states. [2020-10-13 04:56:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:05,445 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-10-13 04:56:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:56:05,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-13 04:56:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:05,447 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:56:05,447 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:56:05,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:56:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:56:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 04:56:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:56:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-13 04:56:05,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 80 [2020-10-13 04:56:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:05,452 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-13 04:56:05,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:56:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-13 04:56:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:56:05,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:05,454 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:05,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:56:05,454 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1180045057, now seen corresponding path program 27 times [2020-10-13 04:56:05,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:05,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974030758] [2020-10-13 04:56:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:56:10,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:56:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:56:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:56:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:56:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:10,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:10,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 04:56:10,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974030758] [2020-10-13 04:56:10,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:10,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:56:10,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420226093] [2020-10-13 04:56:10,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:56:10,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:56:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:56:10,607 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2020-10-13 04:56:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:10,752 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-10-13 04:56:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:56:10,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-13 04:56:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:10,754 INFO L225 Difference]: With dead ends: 103 [2020-10-13 04:56:10,754 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:56:10,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:56:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:56:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-13 04:56:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:56:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-10-13 04:56:10,760 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 82 [2020-10-13 04:56:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:10,761 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-10-13 04:56:10,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:56:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-10-13 04:56:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:56:10,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:10,762 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:10,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:56:10,762 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash 140413419, now seen corresponding path program 28 times [2020-10-13 04:56:10,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:10,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322636397] [2020-10-13 04:56:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:15,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:15,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:56:15,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:56:15,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:16,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:16,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:16,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:16,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:16,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:16,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:16,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:56:16,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322636397] [2020-10-13 04:56:16,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:16,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:56:16,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029277867] [2020-10-13 04:56:16,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:56:16,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:56:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:56:16,016 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 21 states. [2020-10-13 04:56:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:16,186 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2020-10-13 04:56:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:56:16,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-13 04:56:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:16,188 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:56:16,188 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:56:16,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:56:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:56:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:56:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:56:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-10-13 04:56:16,195 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 85 [2020-10-13 04:56:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:16,195 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-10-13 04:56:16,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:56:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-10-13 04:56:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:56:16,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:16,196 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:16,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:56:16,197 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -294537207, now seen corresponding path program 29 times [2020-10-13 04:56:16,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:16,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692743134] [2020-10-13 04:56:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:56:21,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:21,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:21,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:21,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:21,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:56:21,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692743134] [2020-10-13 04:56:21,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:21,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:56:21,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446035084] [2020-10-13 04:56:21,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:56:21,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:21,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:56:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:56:21,468 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 22 states. [2020-10-13 04:56:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:21,632 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2020-10-13 04:56:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:56:21,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-10-13 04:56:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:21,633 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:56:21,633 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:56:21,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:56:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:56:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:56:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:56:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-10-13 04:56:21,639 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 87 [2020-10-13 04:56:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:21,639 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-10-13 04:56:21,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:56:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-10-13 04:56:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:56:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:21,640 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:21,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:56:21,640 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1670261081, now seen corresponding path program 30 times [2020-10-13 04:56:21,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:21,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789162392] [2020-10-13 04:56:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:21,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:22,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:26,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:56:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:56:26,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:56:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:56:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:56:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:26,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:26,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:26,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:26,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:56:26,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789162392] [2020-10-13 04:56:26,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:26,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:56:26,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926231097] [2020-10-13 04:56:26,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:56:26,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:56:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:56:26,808 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 16 states. [2020-10-13 04:56:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:26,963 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-13 04:56:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:56:26,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2020-10-13 04:56:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:26,966 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:56:26,966 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:56:26,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:56:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:56:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 04:56:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:56:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-10-13 04:56:26,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 89 [2020-10-13 04:56:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:26,971 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-10-13 04:56:26,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:56:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-10-13 04:56:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:56:26,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:26,973 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:26,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:56:26,973 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1826301819, now seen corresponding path program 31 times [2020-10-13 04:56:26,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:26,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679040461] [2020-10-13 04:56:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:26,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:27,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:31,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:56:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:32,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:32,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:32,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:32,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:56:32,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679040461] [2020-10-13 04:56:32,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:56:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555803461] [2020-10-13 04:56:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:56:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:56:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:32,272 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 23 states. [2020-10-13 04:56:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:32,439 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2020-10-13 04:56:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:56:32,440 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-13 04:56:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:32,441 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:56:32,441 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:56:32,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:56:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:56:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 04:56:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:56:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-13 04:56:32,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 92 [2020-10-13 04:56:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:32,447 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-13 04:56:32,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:56:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-13 04:56:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:56:32,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:32,448 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:32,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:56:32,449 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -467325785, now seen corresponding path program 32 times [2020-10-13 04:56:32,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:32,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632936798] [2020-10-13 04:56:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:32,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:37,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:37,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:56:37,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:37,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:37,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:37,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:37,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:37,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:37,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 04:56:37,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632936798] [2020-10-13 04:56:37,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:37,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:56:37,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615946161] [2020-10-13 04:56:37,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:56:37,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:56:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:56:37,625 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 17 states. [2020-10-13 04:56:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:37,778 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-13 04:56:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:56:37,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-10-13 04:56:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:37,780 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:56:37,780 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:56:37,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:56:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:56:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 04:56:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:56:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-10-13 04:56:37,787 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 94 [2020-10-13 04:56:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:37,787 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-10-13 04:56:37,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:56:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-10-13 04:56:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:56:37,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:37,788 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:37,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:56:37,789 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1906950789, now seen corresponding path program 33 times [2020-10-13 04:56:37,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:37,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376686815] [2020-10-13 04:56:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:37,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:42,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:56:42,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:56:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:43,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:43,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:43,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:43,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:43,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:56:43,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376686815] [2020-10-13 04:56:43,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:43,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:56:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977163071] [2020-10-13 04:56:43,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:56:43,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:56:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:43,106 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 24 states. [2020-10-13 04:56:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:43,276 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-10-13 04:56:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:56:43,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-13 04:56:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:43,277 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:56:43,278 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:56:43,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:56:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:56:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:56:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-10-13 04:56:43,284 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 97 [2020-10-13 04:56:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:43,285 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-10-13 04:56:43,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:56:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-10-13 04:56:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:56:43,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:43,286 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:43,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:56:43,286 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1371714467, now seen corresponding path program 34 times [2020-10-13 04:56:43,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:43,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043202961] [2020-10-13 04:56:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:44,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:56:48,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:56:48,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043202961] [2020-10-13 04:56:48,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:48,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:56:48,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893300364] [2020-10-13 04:56:48,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:56:48,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:56:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:48,636 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 25 states. [2020-10-13 04:56:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:48,765 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-10-13 04:56:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:56:48,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-13 04:56:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:48,767 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:56:48,768 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:56:48,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:56:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:56:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:56:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-13 04:56:48,774 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 99 [2020-10-13 04:56:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:48,775 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-13 04:56:48,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:56:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-13 04:56:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:56:48,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:48,776 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:48,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:56:48,776 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1889282751, now seen corresponding path program 35 times [2020-10-13 04:56:48,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:48,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544700557] [2020-10-13 04:56:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:53,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:56:53,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:56:53,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:53,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:53,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:56:53,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544700557] [2020-10-13 04:56:53,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:53,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:56:53,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082370563] [2020-10-13 04:56:53,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:56:53,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:56:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:56:53,986 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 18 states. [2020-10-13 04:56:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:54,141 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-13 04:56:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:56:54,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-10-13 04:56:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:54,146 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:56:54,146 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:56:54,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:56:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:56:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-13 04:56:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:56:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-10-13 04:56:54,152 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 101 [2020-10-13 04:56:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:54,152 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-10-13 04:56:54,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:56:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-10-13 04:56:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:56:54,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:54,154 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:54,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:56:54,154 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1649417131, now seen corresponding path program 36 times [2020-10-13 04:56:54,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:54,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415820101] [2020-10-13 04:56:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:54,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:59,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:59,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:56:59,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:56:59,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:59,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:56:59,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:59,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:56:59,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:59,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:59,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:59,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:59,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:59,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:59,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:59,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:59,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:59,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:59,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:56:59,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415820101] [2020-10-13 04:56:59,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:59,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:56:59,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767857136] [2020-10-13 04:56:59,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:56:59,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:56:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:59,574 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 26 states. [2020-10-13 04:56:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:59,775 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-13 04:56:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:56:59,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-13 04:56:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:59,777 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:56:59,777 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:56:59,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:56:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 04:56:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:56:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2020-10-13 04:56:59,782 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 104 [2020-10-13 04:56:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:59,782 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2020-10-13 04:56:59,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:56:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2020-10-13 04:56:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:56:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:59,783 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:59,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:56:59,784 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -556184371, now seen corresponding path program 37 times [2020-10-13 04:56:59,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:59,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14116999] [2020-10-13 04:56:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:59,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:57:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:57:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:57:04,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:05,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:05,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 04:57:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14116999] [2020-10-13 04:57:05,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:05,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:57:05,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400557500] [2020-10-13 04:57:05,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:57:05,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:57:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:57:05,023 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 19 states. [2020-10-13 04:57:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:05,199 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-13 04:57:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:57:05,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2020-10-13 04:57:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:05,201 INFO L225 Difference]: With dead ends: 127 [2020-10-13 04:57:05,201 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:57:05,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:57:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:57:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-13 04:57:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:57:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-10-13 04:57:05,206 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 106 [2020-10-13 04:57:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:05,206 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-10-13 04:57:05,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:57:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-10-13 04:57:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:57:05,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:05,207 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:05,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:57:05,208 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash 420669599, now seen corresponding path program 38 times [2020-10-13 04:57:05,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:05,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751520240] [2020-10-13 04:57:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:10,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:57:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:10,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:57:10,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:10,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:10,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:10,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:10,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:57:10,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751520240] [2020-10-13 04:57:10,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:10,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:57:10,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62103396] [2020-10-13 04:57:10,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:57:10,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:57:10,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:57:10,608 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 27 states. [2020-10-13 04:57:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:10,802 INFO L93 Difference]: Finished difference Result 178 states and 214 transitions. [2020-10-13 04:57:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:57:10,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-13 04:57:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:10,804 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:57:10,804 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 04:57:10,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:57:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 04:57:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 04:57:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:57:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-13 04:57:10,811 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 109 [2020-10-13 04:57:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:10,811 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-13 04:57:10,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:57:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-13 04:57:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:57:10,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:10,812 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:10,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:57:10,812 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -509272899, now seen corresponding path program 39 times [2020-10-13 04:57:10,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:10,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138339753] [2020-10-13 04:57:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:57:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:57:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:16,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:16,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:16,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:16,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:16,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:16,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:16,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:16,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:16,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:16,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:57:16,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138339753] [2020-10-13 04:57:16,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:16,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:57:16,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239071913] [2020-10-13 04:57:16,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:57:16,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:57:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:57:16,230 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 28 states. [2020-10-13 04:57:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:16,425 INFO L93 Difference]: Finished difference Result 180 states and 216 transitions. [2020-10-13 04:57:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:57:16,426 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2020-10-13 04:57:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:16,427 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:57:16,427 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:57:16,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:57:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:57:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 04:57:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:57:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2020-10-13 04:57:16,433 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 111 [2020-10-13 04:57:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:16,434 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2020-10-13 04:57:16,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:57:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2020-10-13 04:57:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:57:16,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:16,435 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:57:16,435 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash -830815909, now seen corresponding path program 40 times [2020-10-13 04:57:16,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66092472] [2020-10-13 04:57:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:21,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:57:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:21,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:21,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:21,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:21,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:21,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:21,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:21,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:21,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:57:21,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66092472] [2020-10-13 04:57:21,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:21,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:57:21,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882522242] [2020-10-13 04:57:21,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:57:21,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:57:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:57:21,751 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 20 states. [2020-10-13 04:57:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:21,927 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2020-10-13 04:57:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:57:21,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-13 04:57:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:21,929 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:57:21,929 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:57:21,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:57:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:57:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-13 04:57:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:57:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-10-13 04:57:21,936 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 113 [2020-10-13 04:57:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:21,936 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-10-13 04:57:21,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:57:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-10-13 04:57:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:57:21,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:21,937 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:21,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:57:21,937 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash 785219921, now seen corresponding path program 41 times [2020-10-13 04:57:21,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:21,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090880030] [2020-10-13 04:57:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:21,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:22,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:26,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:57:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:57:26,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:27,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:27,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:27,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:27,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:27,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:27,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:57:27,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090880030] [2020-10-13 04:57:27,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:27,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:57:27,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104572627] [2020-10-13 04:57:27,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:57:27,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:57:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:57:27,440 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 29 states. [2020-10-13 04:57:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:27,668 INFO L93 Difference]: Finished difference Result 188 states and 226 transitions. [2020-10-13 04:57:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:57:27,668 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-13 04:57:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:27,669 INFO L225 Difference]: With dead ends: 188 [2020-10-13 04:57:27,670 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:57:27,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:57:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:57:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 04:57:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:57:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-10-13 04:57:27,675 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 116 [2020-10-13 04:57:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:27,676 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-10-13 04:57:27,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:57:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-10-13 04:57:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 04:57:27,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:27,677 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:27,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:57:27,678 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -411299981, now seen corresponding path program 42 times [2020-10-13 04:57:27,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:27,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772696720] [2020-10-13 04:57:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:32,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 04:57:32,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:32,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:32,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:32,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:32,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:32,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:32,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:57:32,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772696720] [2020-10-13 04:57:32,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:32,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:57:32,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334990377] [2020-10-13 04:57:32,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:57:32,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:57:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:57:32,962 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 21 states. [2020-10-13 04:57:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:33,138 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2020-10-13 04:57:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:57:33,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2020-10-13 04:57:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:33,140 INFO L225 Difference]: With dead ends: 139 [2020-10-13 04:57:33,140 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:57:33,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:57:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:57:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-13 04:57:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:57:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-13 04:57:33,147 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 118 [2020-10-13 04:57:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:33,147 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-13 04:57:33,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:57:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-13 04:57:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:57:33,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:33,148 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:33,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:57:33,148 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 229399609, now seen corresponding path program 43 times [2020-10-13 04:57:33,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:33,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448956452] [2020-10-13 04:57:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:33,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:38,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:38,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:57:38,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:57:38,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:57:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:57:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:38,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:38,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:38,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:57:38,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448956452] [2020-10-13 04:57:38,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:38,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:57:38,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492669504] [2020-10-13 04:57:38,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:57:38,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:57:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:57:38,624 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 30 states. [2020-10-13 04:57:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:38,761 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2020-10-13 04:57:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:57:38,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-13 04:57:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:38,763 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:57:38,763 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:57:38,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:57:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:57:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:57:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:57:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2020-10-13 04:57:38,770 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 121 [2020-10-13 04:57:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:38,770 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2020-10-13 04:57:38,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:57:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2020-10-13 04:57:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:57:38,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:38,771 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:38,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:57:38,772 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash 468407127, now seen corresponding path program 44 times [2020-10-13 04:57:38,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:38,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081604400] [2020-10-13 04:57:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:38,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:43,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:43,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:57:43,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:57:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:44,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:44,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:44,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:44,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:57:44,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081604400] [2020-10-13 04:57:44,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:44,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:57:44,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293591861] [2020-10-13 04:57:44,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:57:44,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:57:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:57:44,063 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand 22 states. [2020-10-13 04:57:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:44,221 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-13 04:57:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:57:44,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2020-10-13 04:57:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:44,224 INFO L225 Difference]: With dead ends: 144 [2020-10-13 04:57:44,224 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:57:44,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:57:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:57:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-13 04:57:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 04:57:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-13 04:57:44,230 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 123 [2020-10-13 04:57:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:44,230 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-13 04:57:44,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:57:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-13 04:57:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:57:44,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:44,231 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:44,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:57:44,232 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash -306586155, now seen corresponding path program 45 times [2020-10-13 04:57:44,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:44,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056293757] [2020-10-13 04:57:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:44,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:49,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:49,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:57:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:57:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:49,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:57:49,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056293757] [2020-10-13 04:57:49,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:49,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:57:49,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241200773] [2020-10-13 04:57:49,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:57:49,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:57:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:57:49,769 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 31 states. [2020-10-13 04:57:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:49,941 INFO L93 Difference]: Finished difference Result 204 states and 246 transitions. [2020-10-13 04:57:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:57:49,942 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-13 04:57:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:49,943 INFO L225 Difference]: With dead ends: 204 [2020-10-13 04:57:49,943 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 04:57:49,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:57:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 04:57:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 04:57:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:57:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-10-13 04:57:49,950 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 126 [2020-10-13 04:57:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:49,950 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-10-13 04:57:49,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:57:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-10-13 04:57:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:57:49,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:49,951 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:49,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:57:49,951 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:49,952 INFO L82 PathProgramCache]: Analyzing trace with hash -965826185, now seen corresponding path program 46 times [2020-10-13 04:57:49,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:49,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671224235] [2020-10-13 04:57:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:51,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:57:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:57:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:55,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:55,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:55,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:57:55,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671224235] [2020-10-13 04:57:55,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:55,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:57:55,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315518306] [2020-10-13 04:57:55,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:57:55,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:57:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:55,522 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 32 states. [2020-10-13 04:57:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:55,683 INFO L93 Difference]: Finished difference Result 206 states and 248 transitions. [2020-10-13 04:57:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:57:55,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-13 04:57:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:55,685 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:57:55,685 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:57:55,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:57:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:57:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-13 04:57:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 04:57:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2020-10-13 04:57:55,693 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 128 [2020-10-13 04:57:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:55,693 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2020-10-13 04:57:55,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:57:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2020-10-13 04:57:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 04:57:55,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:55,695 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:55,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:57:55,695 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:55,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1159664793, now seen corresponding path program 47 times [2020-10-13 04:57:55,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:55,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544741713] [2020-10-13 04:57:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:00,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:58:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:58:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 04:58:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544741713] [2020-10-13 04:58:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:58:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846167067] [2020-10-13 04:58:01,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:58:01,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:58:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:01,027 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand 23 states. [2020-10-13 04:58:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:01,218 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2020-10-13 04:58:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:58:01,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2020-10-13 04:58:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:01,220 INFO L225 Difference]: With dead ends: 151 [2020-10-13 04:58:01,220 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:58:01,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:58:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:58:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-13 04:58:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:58:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-13 04:58:01,227 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 130 [2020-10-13 04:58:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:01,228 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-13 04:58:01,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:58:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-13 04:58:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:58:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:01,229 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:01,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:58:01,229 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1417642669, now seen corresponding path program 48 times [2020-10-13 04:58:01,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:01,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434937129] [2020-10-13 04:58:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:03,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:03,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:58:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:06,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:06,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:06,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:06,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:06,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:06,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:58:06,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434937129] [2020-10-13 04:58:06,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:06,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:58:06,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437298702] [2020-10-13 04:58:06,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:58:06,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:58:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:58:06,846 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 33 states. [2020-10-13 04:58:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:07,084 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2020-10-13 04:58:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:58:07,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 133 [2020-10-13 04:58:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:07,085 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:58:07,085 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 04:58:07,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:58:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 04:58:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 04:58:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:58:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-13 04:58:07,103 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 133 [2020-10-13 04:58:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:07,103 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-13 04:58:07,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:58:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-13 04:58:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 04:58:07,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:07,105 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:07,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:58:07,106 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:07,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1419790479, now seen corresponding path program 49 times [2020-10-13 04:58:07,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:07,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108699660] [2020-10-13 04:58:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:07,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:58:12,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:12,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:58:12,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108699660] [2020-10-13 04:58:12,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:12,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:58:12,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948156249] [2020-10-13 04:58:12,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:58:12,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:58:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:58:12,743 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 34 states. [2020-10-13 04:58:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:12,924 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2020-10-13 04:58:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:58:12,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 135 [2020-10-13 04:58:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:12,925 INFO L225 Difference]: With dead ends: 216 [2020-10-13 04:58:12,925 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:58:12,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:58:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:58:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 04:58:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:58:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2020-10-13 04:58:12,935 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 135 [2020-10-13 04:58:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:12,935 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2020-10-13 04:58:12,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:58:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2020-10-13 04:58:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:58:12,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:12,937 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:12,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:58:12,937 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 811131407, now seen corresponding path program 50 times [2020-10-13 04:58:12,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:12,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543827064] [2020-10-13 04:58:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:17,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:17,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:58:17,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:17,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:58:17,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:58:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 04:58:17,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:58:17,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:18,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:18,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 04:58:18,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543827064] [2020-10-13 04:58:18,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:18,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:58:18,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510058773] [2020-10-13 04:58:18,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:58:18,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:58:18,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:58:18,307 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand 24 states. [2020-10-13 04:58:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:18,446 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2020-10-13 04:58:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:58:18,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2020-10-13 04:58:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:18,448 INFO L225 Difference]: With dead ends: 158 [2020-10-13 04:58:18,448 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:58:18,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:58:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:58:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-13 04:58:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:58:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-13 04:58:18,453 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 137 [2020-10-13 04:58:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:18,454 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-13 04:58:18,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:58:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-13 04:58:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:58:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:18,455 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:18,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:58:18,455 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 655176733, now seen corresponding path program 51 times [2020-10-13 04:58:18,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:18,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358430404] [2020-10-13 04:58:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:18,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:23,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:23,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:58:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:24,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:24,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:24,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 04:58:24,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358430404] [2020-10-13 04:58:24,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:24,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:58:24,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429361441] [2020-10-13 04:58:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:58:24,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:58:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:58:24,131 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 35 states. [2020-10-13 04:58:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:24,373 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2020-10-13 04:58:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:58:24,373 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 04:58:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:24,374 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:58:24,375 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:58:24,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:58:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:58:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 04:58:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:58:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2020-10-13 04:58:24,380 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 140 [2020-10-13 04:58:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:24,380 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2020-10-13 04:58:24,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:58:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2020-10-13 04:58:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:58:24,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:24,381 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:24,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:58:24,382 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185665, now seen corresponding path program 52 times [2020-10-13 04:58:24,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:24,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802954166] [2020-10-13 04:58:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:58:29,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:58:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 04:58:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:29,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:29,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:29,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:29,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:29,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 04:58:29,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802954166] [2020-10-13 04:58:29,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:29,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:58:29,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993452950] [2020-10-13 04:58:29,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:58:29,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:58:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:29,760 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 25 states. [2020-10-13 04:58:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:29,976 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2020-10-13 04:58:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:58:29,977 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2020-10-13 04:58:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:29,979 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:58:29,979 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 04:58:29,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:58:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 04:58:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-13 04:58:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 04:58:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 174 transitions. [2020-10-13 04:58:29,985 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 174 transitions. Word has length 142 [2020-10-13 04:58:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:29,985 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 174 transitions. [2020-10-13 04:58:29,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:58:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 174 transitions. [2020-10-13 04:58:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:58:29,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:29,986 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:29,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:58:29,987 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:29,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:29,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1584288787, now seen corresponding path program 53 times [2020-10-13 04:58:29,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:29,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760205395] [2020-10-13 04:58:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:30,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking...