/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-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:20:00,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:20:00,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:20:00,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:20:00,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:20:00,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:20:00,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:20:00,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:20:00,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:20:00,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:20:00,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:20:00,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:20:00,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:20:00,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:20:00,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:20:00,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:20:00,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:20:00,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:20:00,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:20:00,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:20:00,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:20:00,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:20:00,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:20:00,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:20:00,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:20:00,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:20:00,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:20:00,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:20:00,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:20:00,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:20:00,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:20:00,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:20:00,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:20:00,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:20:00,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:20:00,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:20:00,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:20:00,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:20:00,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:20:00,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:20:00,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:20:00,868 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 05:20:00,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:20:00,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:20:00,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:20:00,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:20:00,901 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:20:00,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:20:00,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:20:00,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:20:00,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:20:00,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:20:00,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:20:00,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:20:00,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:20:00,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:20:00,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:20:00,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:20:00,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:20:00,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:20:00,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:20:00,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:20:00,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:20:00,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:00,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:20:00,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:20:00,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:20:00,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:20:00,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:20:00,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:20:00,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:20:00,906 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 05:20:01,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:20:01,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:20:01,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:20:01,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:20:01,213 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:20:01,214 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2020-10-13 05:20:01,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/058ad1e41/a980a7259bf44bae8964969bf06a39b1/FLAG3ac468bc8 [2020-10-13 05:20:01,702 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:20:01,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome1-1.i [2020-10-13 05:20:01,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/058ad1e41/a980a7259bf44bae8964969bf06a39b1/FLAG3ac468bc8 [2020-10-13 05:20:02,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/058ad1e41/a980a7259bf44bae8964969bf06a39b1 [2020-10-13 05:20:02,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:20:02,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:20:02,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:02,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:20:02,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:20:02,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d71150d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02, skipping insertion in model container [2020-10-13 05:20:02,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:20:02,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:20:02,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:02,322 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:20:02,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:02,363 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:20:02,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02 WrapperNode [2020-10-13 05:20:02,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:02,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:20:02,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:20:02,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:20:02,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (1/1) ... [2020-10-13 05:20:02,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:20:02,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:20:02,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:20:02,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:20:02,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (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 05:20:02,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:20:02,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:20:02,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:20:02,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:20:02,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:20:02,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:20:02,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:20:02,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:20:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:20:02,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:20:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:20:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:20:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:20:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:20:02,835 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:20:02,836 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:20:02,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:02 BoogieIcfgContainer [2020-10-13 05:20:02,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:20:02,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:20:02,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:20:02,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:20:02,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:20:02" (1/3) ... [2020-10-13 05:20:02,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f67e9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:02, skipping insertion in model container [2020-10-13 05:20:02,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:02" (2/3) ... [2020-10-13 05:20:02,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f67e9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:02, skipping insertion in model container [2020-10-13 05:20:02,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:02" (3/3) ... [2020-10-13 05:20:02,847 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2020-10-13 05:20:02,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:20:02,865 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:20:02,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:20:02,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:20:02,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:20:02,911 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:20:02,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:20:02,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:20:02,911 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:20:02,911 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:20:02,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:20:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 05:20:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:20:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:02,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:02,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2020-10-13 05:20:02,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:02,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574287713] [2020-10-13 05:20:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:20:03,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:03,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 05:20:03,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:20:03,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:03,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:03,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:20:03,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:03,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:03,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:03,275 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 05:20:03,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574287713] [2020-10-13 05:20:03,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:03,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:20:03,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688664247] [2020-10-13 05:20:03,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:20:03,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:20:03,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:03,302 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 05:20:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:03,401 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-13 05:20:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:20:03,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 05:20:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:03,412 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:20:03,412 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:20:03,415 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 05:20:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:20:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 05:20:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 05:20:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 05:20:03,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-13 05:20:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:03,455 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 05:20:03,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:20:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 05:20:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:20:03,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:03,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:03,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:20:03,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2020-10-13 05:20:03,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:03,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460963355] [2020-10-13 05:20:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:20:03,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:20:03,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-13 05:20:03,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:03,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:03,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:20:03,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:03,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:03,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:03,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:03,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:03,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:03,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:03,767 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 05:20:03,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460963355] [2020-10-13 05:20:03,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:03,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:20:03,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838468511] [2020-10-13 05:20:03,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:20:03,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:20:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:20:03,775 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-13 05:20:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:03,869 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-13 05:20:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:20:03,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 05:20:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:03,871 INFO L225 Difference]: With dead ends: 45 [2020-10-13 05:20:03,871 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:20:03,873 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 05:20:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:20:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 05:20:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:20:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 05:20:03,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-10-13 05:20:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:03,881 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 05:20:03,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:20:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 05:20:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:20:03,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:03,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:03,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:20:03,883 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2020-10-13 05:20:03,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:03,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908694303] [2020-10-13 05:20:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:20:04,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:04,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-13 05:20:04,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:04,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:04,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:04,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:04,493 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 05:20:04,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908694303] [2020-10-13 05:20:04,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:04,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:20:04,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50473720] [2020-10-13 05:20:04,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:04,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:04,496 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-10-13 05:20:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:04,578 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-13 05:20:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:04,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:20:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:04,580 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:20:04,580 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:20:04,580 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 05:20:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:20:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-13 05:20:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:20:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 05:20:04,588 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-13 05:20:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:04,588 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 05:20:04,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 05:20:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:20:04,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:04,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:04,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:20:04,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -845622965, now seen corresponding path program 2 times [2020-10-13 05:20:04,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:04,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774867017] [2020-10-13 05:20:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:06,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:20:06,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1767 [2020-10-13 05:20:06,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:20:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:20:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:06,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:06,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:06,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:06,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:06,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:06,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:20:06,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774867017] [2020-10-13 05:20:06,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:06,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:20:06,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308585460] [2020-10-13 05:20:06,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:20:06,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:20:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:20:06,428 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 05:20:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:06,527 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-13 05:20:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:20:06,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 05:20:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:06,533 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:20:06,533 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 05:20:06,534 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 05:20:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 05:20:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-13 05:20:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:20:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-13 05:20:06,555 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2020-10-13 05:20:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:06,555 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-13 05:20:06,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:20:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-13 05:20:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:20:06,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:06,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:06,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:20:06,558 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:06,558 INFO L82 PathProgramCache]: Analyzing trace with hash -452595955, now seen corresponding path program 1 times [2020-10-13 05:20:06,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:06,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473314243] [2020-10-13 05:20:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:06,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:20:07,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:07,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-13 05:20:07,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:20:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:07,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:07,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:07,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:20:07,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:07,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:07,585 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 05:20:07,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473314243] [2020-10-13 05:20:07,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:07,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:20:07,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638690427] [2020-10-13 05:20:07,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:07,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:07,588 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-13 05:20:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:07,684 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-13 05:20:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:20:07,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 05:20:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:07,685 INFO L225 Difference]: With dead ends: 74 [2020-10-13 05:20:07,685 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:20:07,686 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 05:20:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:20:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-13 05:20:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 05:20:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 05:20:07,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-13 05:20:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:07,694 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 05:20:07,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 05:20:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:20:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:07,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:07,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:20:07,696 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:07,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1652438966, now seen corresponding path program 2 times [2020-10-13 05:20:07,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:07,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064821337] [2020-10-13 05:20:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:07,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:09,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:20:09,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:09,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1478 [2020-10-13 05:20:09,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:20:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:20:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:09,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:09,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:09,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:09,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:09,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:09,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:09,237 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 05:20:09,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064821337] [2020-10-13 05:20:09,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:09,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:20:09,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951678652] [2020-10-13 05:20:09,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:20:09,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:20:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:09,239 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-10-13 05:20:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:09,344 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-10-13 05:20:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:20:09,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 05:20:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:09,346 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:20:09,346 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 05:20:09,347 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 05:20:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 05:20:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-13 05:20:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:20:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-13 05:20:09,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 31 [2020-10-13 05:20:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:09,354 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-13 05:20:09,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:20:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-13 05:20:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:20:09,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:09,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:09,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:20:09,356 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1444845839, now seen corresponding path program 3 times [2020-10-13 05:20:09,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:09,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909744826] [2020-10-13 05:20:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:12,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:20:12,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2983 [2020-10-13 05:20:12,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:20:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:20:12,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:12,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:12,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:12,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:12,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:12,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:20:12,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909744826] [2020-10-13 05:20:12,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:12,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:20:12,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637901955] [2020-10-13 05:20:12,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:20:12,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:20:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:12,418 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 8 states. [2020-10-13 05:20:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:12,538 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-13 05:20:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:20:12,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 05:20:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:12,540 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:20:12,540 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:20:12,541 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 05:20:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:20:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-13 05:20:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:20:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-13 05:20:12,548 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 36 [2020-10-13 05:20:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:12,548 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-13 05:20:12,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:20:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-13 05:20:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:20:12,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:12,550 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:12,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:20:12,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -366397486, now seen corresponding path program 4 times [2020-10-13 05:20:12,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:12,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784717860] [2020-10-13 05:20:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:12,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:20:16,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:16,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3645 [2020-10-13 05:20:16,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:20:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:20:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:16,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:16,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:16,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:16,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:16,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:16,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:16,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:16,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:16,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 05:20:16,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784717860] [2020-10-13 05:20:16,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:16,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:20:16,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042645955] [2020-10-13 05:20:16,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:20:16,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:20:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:16,295 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 9 states. [2020-10-13 05:20:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:16,439 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-13 05:20:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:20:16,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-13 05:20:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:16,442 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:20:16,442 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:20:16,445 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 05:20:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:20:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-10-13 05:20:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:20:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 05:20:16,461 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 41 [2020-10-13 05:20:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:16,461 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 05:20:16,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:20:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 05:20:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:20:16,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:16,463 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:16,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:20:16,464 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1560772907, now seen corresponding path program 5 times [2020-10-13 05:20:16,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:16,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118244364] [2020-10-13 05:20:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:21,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:20:21,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:20:21,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:20:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:20:21,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:21,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:21,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:21,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:21,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 05:20:21,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118244364] [2020-10-13 05:20:21,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:21,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:20:21,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157729889] [2020-10-13 05:20:21,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:20:21,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:20:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:21,573 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 10 states. [2020-10-13 05:20:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:21,709 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-10-13 05:20:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:20:21,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-13 05:20:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:21,711 INFO L225 Difference]: With dead ends: 130 [2020-10-13 05:20:21,711 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:20:21,712 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 05:20:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:20:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-13 05:20:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:20:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-13 05:20:21,731 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 46 [2020-10-13 05:20:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:21,731 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-13 05:20:21,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:20:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-13 05:20:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:20:21,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:21,732 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:21,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:20:21,733 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -835225618, now seen corresponding path program 6 times [2020-10-13 05:20:21,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:21,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19392341] [2020-10-13 05:20:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:21,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:20:26,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:20:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:20:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:20:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:26,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:26,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:26,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:26,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:26,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:26,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:26,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:26,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 05:20:26,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19392341] [2020-10-13 05:20:26,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:26,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:20:26,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515949308] [2020-10-13 05:20:26,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:20:26,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:20:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:20:26,878 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 11 states. [2020-10-13 05:20:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:27,045 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2020-10-13 05:20:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:20:27,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 05:20:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:27,046 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:20:27,047 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:20:27,047 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 05:20:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:20:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-13 05:20:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:20:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2020-10-13 05:20:27,065 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 51 [2020-10-13 05:20:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:27,065 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2020-10-13 05:20:27,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:20:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2020-10-13 05:20:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:20:27,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:27,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:27,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:20:27,067 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1861056185, now seen corresponding path program 7 times [2020-10-13 05:20:27,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:27,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506372200] [2020-10-13 05:20:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:27,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:20:32,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:32,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:20:32,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:20:32,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:32,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:20:32,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:32,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:32,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:32,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:32,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:32,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 05:20:32,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506372200] [2020-10-13 05:20:32,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:32,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:20:32,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049819621] [2020-10-13 05:20:32,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:20:32,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:20:32,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:20:32,180 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 12 states. [2020-10-13 05:20:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:32,319 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2020-10-13 05:20:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:20:32,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-13 05:20:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:32,321 INFO L225 Difference]: With dead ends: 158 [2020-10-13 05:20:32,322 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 05:20:32,322 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 05:20:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 05:20:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-13 05:20:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 05:20:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-13 05:20:32,329 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 56 [2020-10-13 05:20:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:32,329 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-13 05:20:32,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:20:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-13 05:20:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:20:32,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:32,331 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:32,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:20:32,331 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1010386934, now seen corresponding path program 8 times [2020-10-13 05:20:32,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:32,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767246956] [2020-10-13 05:20:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:37,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:20:37,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:37,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:20:37,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:20:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:20:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:37,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:37,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:37,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:37,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 05:20:37,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767246956] [2020-10-13 05:20:37,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:37,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:20:37,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099500612] [2020-10-13 05:20:37,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:20:37,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:20:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:20:37,469 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 13 states. [2020-10-13 05:20:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:37,620 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2020-10-13 05:20:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:20:37,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-13 05:20:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:37,621 INFO L225 Difference]: With dead ends: 172 [2020-10-13 05:20:37,621 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:20:37,622 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 05:20:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:20:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-10-13 05:20:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:20:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-13 05:20:37,628 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 61 [2020-10-13 05:20:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:37,628 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-13 05:20:37,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:20:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-13 05:20:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:20:37,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:37,630 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:37,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:20:37,630 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1575128733, now seen corresponding path program 9 times [2020-10-13 05:20:37,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:37,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560233317] [2020-10-13 05:20:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:37,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:39,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:20:42,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:20:42,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:20:42,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:20:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:42,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:20:42,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:42,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:42,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:42,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:42,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:42,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 05:20:42,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560233317] [2020-10-13 05:20:42,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:42,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:20:42,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549076983] [2020-10-13 05:20:42,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:20:42,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:42,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:20:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:20:42,770 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 14 states. [2020-10-13 05:20:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:42,949 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2020-10-13 05:20:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:20:42,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-13 05:20:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:42,951 INFO L225 Difference]: With dead ends: 186 [2020-10-13 05:20:42,951 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:20:42,952 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 05:20:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:20:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-10-13 05:20:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 05:20:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-13 05:20:42,957 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 66 [2020-10-13 05:20:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:42,958 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-13 05:20:42,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:20:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-13 05:20:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:20:42,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:42,959 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:42,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:20:42,959 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash 477411366, now seen corresponding path program 10 times [2020-10-13 05:20:42,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:42,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398673908] [2020-10-13 05:20:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:42,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:43,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:45,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:47,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:47,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:20:47,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:47,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:20:47,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:20:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:20:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:48,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:48,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:48,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:48,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 05:20:48,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398673908] [2020-10-13 05:20:48,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:48,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:20:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356749191] [2020-10-13 05:20:48,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:20:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:20:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:20:48,119 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 15 states. [2020-10-13 05:20:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:48,275 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2020-10-13 05:20:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:20:48,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-13 05:20:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:48,278 INFO L225 Difference]: With dead ends: 200 [2020-10-13 05:20:48,279 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 05:20:48,280 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 05:20:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 05:20:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-10-13 05:20:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 05:20:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2020-10-13 05:20:48,291 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 71 [2020-10-13 05:20:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:48,291 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2020-10-13 05:20:48,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:20:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2020-10-13 05:20:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:20:48,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:48,292 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:48,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:20:48,293 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -713423231, now seen corresponding path program 11 times [2020-10-13 05:20:48,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:48,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046170398] [2020-10-13 05:20:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:48,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:53,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:20:53,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:53,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 05:20:53,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:53,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:20:53,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:53,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:20:53,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:53,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:53,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:53,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:53,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:53,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:53,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:53,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:53,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:20:53,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046170398] [2020-10-13 05:20:53,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:53,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:20:53,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83989685] [2020-10-13 05:20:53,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:20:53,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:20:53,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:20:53,508 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 16 states. [2020-10-13 05:20:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:53,719 INFO L93 Difference]: Finished difference Result 214 states and 250 transitions. [2020-10-13 05:20:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:20:53,719 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-13 05:20:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:53,721 INFO L225 Difference]: With dead ends: 214 [2020-10-13 05:20:53,721 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:20:53,722 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 05:20:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:20:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2020-10-13 05:20:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 05:20:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-10-13 05:20:53,728 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 76 [2020-10-13 05:20:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:53,728 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-10-13 05:20:53,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:20:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-10-13 05:20:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:20:53,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:53,730 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:53,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:20:53,730 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1650407490, now seen corresponding path program 12 times [2020-10-13 05:20:53,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:53,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19265255] [2020-10-13 05:20:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:53,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:58,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:20:58,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:20:58,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:58,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:58,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:58,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:58,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:58,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:20:58,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 05:20:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19265255] [2020-10-13 05:20:58,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:58,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:20:58,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487302414] [2020-10-13 05:20:58,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:20:58,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:20:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:20:58,943 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 17 states. [2020-10-13 05:20:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:59,154 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-10-13 05:20:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:20:59,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-13 05:20:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:59,156 INFO L225 Difference]: With dead ends: 228 [2020-10-13 05:20:59,156 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 05:20:59,157 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 05:20:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 05:20:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-10-13 05:20:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 05:20:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2020-10-13 05:20:59,163 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 81 [2020-10-13 05:20:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:59,164 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2020-10-13 05:20:59,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:20:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2020-10-13 05:20:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:20:59,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:59,165 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:59,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:20:59,166 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1261035931, now seen corresponding path program 13 times [2020-10-13 05:20:59,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:59,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794345377] [2020-10-13 05:20:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:59,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:03,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:21:04,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:04,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:21:04,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:21:04,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:04,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:21:04,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:04,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:04,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:04,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:04,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:04,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:04,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 05:21:04,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794345377] [2020-10-13 05:21:04,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:04,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:21:04,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754583376] [2020-10-13 05:21:04,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:21:04,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:21:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:21:04,364 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand 18 states. [2020-10-13 05:21:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:04,590 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2020-10-13 05:21:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:21:04,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-13 05:21:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:04,592 INFO L225 Difference]: With dead ends: 242 [2020-10-13 05:21:04,592 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 05:21:04,593 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 05:21:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 05:21:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-13 05:21:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 05:21:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2020-10-13 05:21:04,599 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 86 [2020-10-13 05:21:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:04,599 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2020-10-13 05:21:04,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:21:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2020-10-13 05:21:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 05:21:04,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:04,601 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:04,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:21:04,601 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash -198969250, now seen corresponding path program 14 times [2020-10-13 05:21:04,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:04,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477582690] [2020-10-13 05:21:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:04,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:04,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:09,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:21:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:21:09,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:09,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:09,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:09,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 05:21:09,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477582690] [2020-10-13 05:21:09,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:09,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:21:09,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153017843] [2020-10-13 05:21:09,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:21:09,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:21:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:21:09,843 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand 19 states. [2020-10-13 05:21:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:10,087 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2020-10-13 05:21:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:21:10,087 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-10-13 05:21:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:10,089 INFO L225 Difference]: With dead ends: 256 [2020-10-13 05:21:10,089 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 05:21:10,090 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 05:21:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 05:21:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-10-13 05:21:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 05:21:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2020-10-13 05:21:10,096 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 91 [2020-10-13 05:21:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:10,096 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2020-10-13 05:21:10,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:21:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2020-10-13 05:21:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 05:21:10,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:10,098 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:10,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:21:10,098 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1197926839, now seen corresponding path program 15 times [2020-10-13 05:21:10,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:10,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470505694] [2020-10-13 05:21:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:10,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:10,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:11,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:21:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:15,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:15,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:15,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:15,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 05:21:15,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470505694] [2020-10-13 05:21:15,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:15,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:21:15,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674511704] [2020-10-13 05:21:15,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:21:15,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:21:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:21:15,346 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand 20 states. [2020-10-13 05:21:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:15,571 INFO L93 Difference]: Finished difference Result 270 states and 314 transitions. [2020-10-13 05:21:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:21:15,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-10-13 05:21:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:15,572 INFO L225 Difference]: With dead ends: 270 [2020-10-13 05:21:15,573 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 05:21:15,573 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 05:21:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 05:21:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2020-10-13 05:21:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 05:21:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2020-10-13 05:21:15,589 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 96 [2020-10-13 05:21:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:15,589 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2020-10-13 05:21:15,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:21:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2020-10-13 05:21:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:21:15,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:15,591 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:15,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:21:15,594 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1595885446, now seen corresponding path program 16 times [2020-10-13 05:21:15,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:15,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849831550] [2020-10-13 05:21:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:15,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:17,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:21:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:20,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:20,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:20,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:20,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:20,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:20,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:20,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:20,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:20,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 05:21:20,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849831550] [2020-10-13 05:21:20,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:20,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:21:20,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962370886] [2020-10-13 05:21:20,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:21:20,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:21:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:21:20,847 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand 21 states. [2020-10-13 05:21:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:21,081 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2020-10-13 05:21:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:21:21,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 101 [2020-10-13 05:21:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:21,083 INFO L225 Difference]: With dead ends: 284 [2020-10-13 05:21:21,083 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:21:21,084 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 05:21:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:21:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-10-13 05:21:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 05:21:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-10-13 05:21:21,097 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 101 [2020-10-13 05:21:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:21,098 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-10-13 05:21:21,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:21:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-10-13 05:21:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 05:21:21,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:21,099 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:21,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:21:21,100 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -555405779, now seen corresponding path program 17 times [2020-10-13 05:21:21,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:21,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800809019] [2020-10-13 05:21:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:22,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:21:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:21:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:26,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:26,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:26,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 05:21:26,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800809019] [2020-10-13 05:21:26,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:26,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:21:26,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437028769] [2020-10-13 05:21:26,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:21:26,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:21:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:21:26,385 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 22 states. [2020-10-13 05:21:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:26,630 INFO L93 Difference]: Finished difference Result 298 states and 346 transitions. [2020-10-13 05:21:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:21:26,630 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-10-13 05:21:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:26,632 INFO L225 Difference]: With dead ends: 298 [2020-10-13 05:21:26,632 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 05:21:26,633 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 05:21:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 05:21:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2020-10-13 05:21:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 05:21:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 195 transitions. [2020-10-13 05:21:26,639 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 195 transitions. Word has length 106 [2020-10-13 05:21:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:26,640 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 195 transitions. [2020-10-13 05:21:26,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:21:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 195 transitions. [2020-10-13 05:21:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 05:21:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:26,641 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:26,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:21:26,641 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1144207510, now seen corresponding path program 18 times [2020-10-13 05:21:26,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:26,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46989132] [2020-10-13 05:21:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:26,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:31,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:21:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 05:21:31,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46989132] [2020-10-13 05:21:31,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:31,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:21:31,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752826599] [2020-10-13 05:21:31,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:21:31,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:21:31,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:21:31,956 INFO L87 Difference]: Start difference. First operand 172 states and 195 transitions. Second operand 23 states. [2020-10-13 05:21:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:32,263 INFO L93 Difference]: Finished difference Result 312 states and 362 transitions. [2020-10-13 05:21:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:21:32,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-13 05:21:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:32,266 INFO L225 Difference]: With dead ends: 312 [2020-10-13 05:21:32,267 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 05:21:32,267 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 05:21:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 05:21:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2020-10-13 05:21:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 05:21:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-13 05:21:32,284 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 111 [2020-10-13 05:21:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:32,284 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-13 05:21:32,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:21:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-13 05:21:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 05:21:32,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:32,289 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:32,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:21:32,289 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -883120623, now seen corresponding path program 19 times [2020-10-13 05:21:32,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:32,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11960533] [2020-10-13 05:21:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:37,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 05:21:37,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:37,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-13 05:21:37,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:21:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:21:37,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:37,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:37,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:37,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:37,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 05:21:37,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11960533] [2020-10-13 05:21:37,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:37,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:21:37,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931074026] [2020-10-13 05:21:37,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:21:37,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:21:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:21:37,699 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 24 states. [2020-10-13 05:21:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:38,022 INFO L93 Difference]: Finished difference Result 326 states and 378 transitions. [2020-10-13 05:21:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:21:38,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-10-13 05:21:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:38,024 INFO L225 Difference]: With dead ends: 326 [2020-10-13 05:21:38,024 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 05:21:38,025 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 05:21:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 05:21:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-10-13 05:21:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 05:21:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2020-10-13 05:21:38,035 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 116 [2020-10-13 05:21:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:38,035 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2020-10-13 05:21:38,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:21:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2020-10-13 05:21:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 05:21:38,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:38,037 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:38,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:21:38,038 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1647917234, now seen corresponding path program 20 times [2020-10-13 05:21:38,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:38,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887551134] [2020-10-13 05:21:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:38,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:38,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:40,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:40,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:43,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:21:43,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:21:43,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 05:21:43,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:21:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:43,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:21:43,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:43,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:43,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:43,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:43,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:43,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:43,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:43,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:21:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 05:21:43,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887551134] [2020-10-13 05:21:43,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:43,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:21:43,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845497033] [2020-10-13 05:21:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:21:43,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:21:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:43,449 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand 25 states. [2020-10-13 05:21:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:43,772 INFO L93 Difference]: Finished difference Result 340 states and 394 transitions. [2020-10-13 05:21:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:21:43,773 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-13 05:21:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:43,774 INFO L225 Difference]: With dead ends: 340 [2020-10-13 05:21:43,774 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 05:21:43,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:21:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 05:21:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-13 05:21:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 05:21:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2020-10-13 05:21:43,783 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 121 [2020-10-13 05:21:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:43,783 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2020-10-13 05:21:43,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:21:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2020-10-13 05:21:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:21:43,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:43,785 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:43,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:21:43,786 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash 723631605, now seen corresponding path program 21 times [2020-10-13 05:21:43,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:43,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503514349] [2020-10-13 05:21:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:43,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:47,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:48,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:48,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:21:48,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:21:48,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:49,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:49,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:49,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 05:21:49,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503514349] [2020-10-13 05:21:49,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:49,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:21:49,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649790374] [2020-10-13 05:21:49,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:21:49,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:21:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:21:49,232 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand 26 states. [2020-10-13 05:21:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:49,544 INFO L93 Difference]: Finished difference Result 354 states and 410 transitions. [2020-10-13 05:21:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:21:49,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-10-13 05:21:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:49,547 INFO L225 Difference]: With dead ends: 354 [2020-10-13 05:21:49,547 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 05:21:49,548 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 05:21:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 05:21:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2020-10-13 05:21:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 05:21:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-10-13 05:21:49,556 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 126 [2020-10-13 05:21:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:49,556 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-10-13 05:21:49,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:21:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-10-13 05:21:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 05:21:49,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:49,558 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:49,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:21:49,558 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1013942066, now seen corresponding path program 22 times [2020-10-13 05:21:49,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:49,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808572592] [2020-10-13 05:21:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:53,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:54,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:54,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:21:54,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:21:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:54,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:21:54,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:21:54,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:21:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:21:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 05:21:55,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808572592] [2020-10-13 05:21:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:21:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:21:55,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379232680] [2020-10-13 05:21:55,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:21:55,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:21:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:21:55,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:21:55,007 INFO L87 Difference]: Start difference. First operand 204 states and 231 transitions. Second operand 27 states. [2020-10-13 05:21:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:21:55,330 INFO L93 Difference]: Finished difference Result 368 states and 426 transitions. [2020-10-13 05:21:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:21:55,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-10-13 05:21:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:21:55,333 INFO L225 Difference]: With dead ends: 368 [2020-10-13 05:21:55,333 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 05:21:55,336 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 05:21:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 05:21:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2020-10-13 05:21:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 05:21:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 240 transitions. [2020-10-13 05:21:55,353 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 240 transitions. Word has length 131 [2020-10-13 05:21:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:21:55,354 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 240 transitions. [2020-10-13 05:21:55,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:21:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 240 transitions. [2020-10-13 05:21:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 05:21:55,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:21:55,356 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:21:55,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:21:55,356 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:21:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:21:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash 416724441, now seen corresponding path program 23 times [2020-10-13 05:21:55,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:21:55,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645938631] [2020-10-13 05:21:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:21:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:21:55,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:21:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:00,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:22:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:00,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:00,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:00,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 05:22:00,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645938631] [2020-10-13 05:22:00,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:00,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:22:00,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689943591] [2020-10-13 05:22:00,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:22:00,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:00,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:22:00,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:22:00,828 INFO L87 Difference]: Start difference. First operand 212 states and 240 transitions. Second operand 28 states. [2020-10-13 05:22:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:01,269 INFO L93 Difference]: Finished difference Result 382 states and 442 transitions. [2020-10-13 05:22:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:22:01,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-10-13 05:22:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:01,272 INFO L225 Difference]: With dead ends: 382 [2020-10-13 05:22:01,272 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 05:22:01,274 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 05:22:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 05:22:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2020-10-13 05:22:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 05:22:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2020-10-13 05:22:01,289 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 136 [2020-10-13 05:22:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:01,289 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2020-10-13 05:22:01,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:22:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2020-10-13 05:22:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 05:22:01,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:01,291 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:01,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:22:01,292 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash 290896106, now seen corresponding path program 24 times [2020-10-13 05:22:01,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:01,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068941795] [2020-10-13 05:22:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:01,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:01,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:06,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:06,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:22:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:06,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:06,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:06,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:06,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:06,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:06,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 05:22:06,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068941795] [2020-10-13 05:22:06,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:06,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:22:06,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754036648] [2020-10-13 05:22:06,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:22:06,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:22:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:06,820 INFO L87 Difference]: Start difference. First operand 220 states and 249 transitions. Second operand 29 states. [2020-10-13 05:22:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:07,172 INFO L93 Difference]: Finished difference Result 396 states and 458 transitions. [2020-10-13 05:22:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:22:07,173 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-13 05:22:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:07,174 INFO L225 Difference]: With dead ends: 396 [2020-10-13 05:22:07,175 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 05:22:07,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:22:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 05:22:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 228. [2020-10-13 05:22:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 05:22:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 258 transitions. [2020-10-13 05:22:07,183 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 258 transitions. Word has length 141 [2020-10-13 05:22:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:07,184 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 258 transitions. [2020-10-13 05:22:07,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:22:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 258 transitions. [2020-10-13 05:22:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 05:22:07,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:07,185 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:07,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:22:07,186 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2137141827, now seen corresponding path program 25 times [2020-10-13 05:22:07,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:07,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436244408] [2020-10-13 05:22:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:07,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:12,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 05:22:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:22:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:12,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:12,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:12,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:12,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 05:22:12,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436244408] [2020-10-13 05:22:12,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:12,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:22:12,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623387677] [2020-10-13 05:22:12,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:22:12,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:22:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:22:12,674 INFO L87 Difference]: Start difference. First operand 228 states and 258 transitions. Second operand 30 states. [2020-10-13 05:22:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:13,002 INFO L93 Difference]: Finished difference Result 410 states and 474 transitions. [2020-10-13 05:22:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:22:13,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-10-13 05:22:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:13,005 INFO L225 Difference]: With dead ends: 410 [2020-10-13 05:22:13,005 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 05:22:13,007 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 05:22:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 05:22:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 236. [2020-10-13 05:22:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-13 05:22:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2020-10-13 05:22:13,015 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 146 [2020-10-13 05:22:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:13,015 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2020-10-13 05:22:13,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:22:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2020-10-13 05:22:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 05:22:13,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:13,017 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:13,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:22:13,017 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:13,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1898559750, now seen corresponding path program 26 times [2020-10-13 05:22:13,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:13,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288747652] [2020-10-13 05:22:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:13,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:13,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:18,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:22:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:18,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:18,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 05:22:18,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288747652] [2020-10-13 05:22:18,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:18,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:22:18,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982027322] [2020-10-13 05:22:18,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:22:18,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:22:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:22:18,682 INFO L87 Difference]: Start difference. First operand 236 states and 267 transitions. Second operand 31 states. [2020-10-13 05:22:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:19,087 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2020-10-13 05:22:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:22:19,088 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 151 [2020-10-13 05:22:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:19,090 INFO L225 Difference]: With dead ends: 424 [2020-10-13 05:22:19,090 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 05:22:19,091 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 05:22:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 05:22:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 244. [2020-10-13 05:22:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 05:22:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2020-10-13 05:22:19,101 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 151 [2020-10-13 05:22:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:19,102 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2020-10-13 05:22:19,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:22:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2020-10-13 05:22:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 05:22:19,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:19,103 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:19,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:22:19,104 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2078718559, now seen corresponding path program 27 times [2020-10-13 05:22:19,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:19,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135869281] [2020-10-13 05:22:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:19,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:24,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:22:24,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:24,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:24,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:24,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 05:22:24,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135869281] [2020-10-13 05:22:24,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:24,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:22:24,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22110526] [2020-10-13 05:22:24,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:22:24,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:24,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:22:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:22:24,667 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand 32 states. [2020-10-13 05:22:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:25,054 INFO L93 Difference]: Finished difference Result 438 states and 506 transitions. [2020-10-13 05:22:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:22:25,054 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-13 05:22:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:25,056 INFO L225 Difference]: With dead ends: 438 [2020-10-13 05:22:25,056 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 05:22:25,057 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 05:22:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 05:22:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-10-13 05:22:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 05:22:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 285 transitions. [2020-10-13 05:22:25,065 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 285 transitions. Word has length 156 [2020-10-13 05:22:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:25,066 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 285 transitions. [2020-10-13 05:22:25,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:22:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 285 transitions. [2020-10-13 05:22:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 05:22:25,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:25,067 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:25,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:22:25,068 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 556218658, now seen corresponding path program 28 times [2020-10-13 05:22:25,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:25,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157144989] [2020-10-13 05:22:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:25,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:30,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:22:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:30,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:30,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:30,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 05:22:30,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157144989] [2020-10-13 05:22:30,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:30,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:22:30,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634547637] [2020-10-13 05:22:30,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:22:30,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:22:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:30,686 INFO L87 Difference]: Start difference. First operand 252 states and 285 transitions. Second operand 33 states. [2020-10-13 05:22:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:31,147 INFO L93 Difference]: Finished difference Result 452 states and 522 transitions. [2020-10-13 05:22:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:22:31,148 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2020-10-13 05:22:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:31,149 INFO L225 Difference]: With dead ends: 452 [2020-10-13 05:22:31,149 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 05:22:31,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:22:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 05:22:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-10-13 05:22:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 05:22:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 294 transitions. [2020-10-13 05:22:31,159 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 294 transitions. Word has length 161 [2020-10-13 05:22:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:31,159 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 294 transitions. [2020-10-13 05:22:31,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:22:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 294 transitions. [2020-10-13 05:22:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 05:22:31,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:31,161 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:31,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:22:31,161 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash -563389051, now seen corresponding path program 29 times [2020-10-13 05:22:31,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:31,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619759121] [2020-10-13 05:22:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:31,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:36,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:22:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:22:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:36,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:36,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:36,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 05:22:36,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619759121] [2020-10-13 05:22:36,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:36,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:22:36,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158400512] [2020-10-13 05:22:36,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:22:36,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:22:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:22:36,832 INFO L87 Difference]: Start difference. First operand 260 states and 294 transitions. Second operand 34 states. [2020-10-13 05:22:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:37,251 INFO L93 Difference]: Finished difference Result 466 states and 538 transitions. [2020-10-13 05:22:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:22:37,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 166 [2020-10-13 05:22:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:37,254 INFO L225 Difference]: With dead ends: 466 [2020-10-13 05:22:37,254 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 05:22:37,255 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 05:22:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 05:22:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 268. [2020-10-13 05:22:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 05:22:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 303 transitions. [2020-10-13 05:22:37,266 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 303 transitions. Word has length 166 [2020-10-13 05:22:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:37,266 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 303 transitions. [2020-10-13 05:22:37,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:22:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 303 transitions. [2020-10-13 05:22:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 05:22:37,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:37,268 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:37,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:22:37,269 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash 334297406, now seen corresponding path program 30 times [2020-10-13 05:22:37,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:37,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727149301] [2020-10-13 05:22:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:42,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:42,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 05:22:42,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:22:42,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:43,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:43,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 05:22:43,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727149301] [2020-10-13 05:22:43,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:43,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:22:43,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313792677] [2020-10-13 05:22:43,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:22:43,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:22:43,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:43,050 INFO L87 Difference]: Start difference. First operand 268 states and 303 transitions. Second operand 35 states. [2020-10-13 05:22:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:43,557 INFO L93 Difference]: Finished difference Result 480 states and 554 transitions. [2020-10-13 05:22:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:22:43,558 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 171 [2020-10-13 05:22:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:43,562 INFO L225 Difference]: With dead ends: 480 [2020-10-13 05:22:43,562 INFO L226 Difference]: Without dead ends: 281 [2020-10-13 05:22:43,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:22:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-13 05:22:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 276. [2020-10-13 05:22:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 05:22:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 312 transitions. [2020-10-13 05:22:43,571 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 312 transitions. Word has length 171 [2020-10-13 05:22:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:43,571 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 312 transitions. [2020-10-13 05:22:43,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:22:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 312 transitions. [2020-10-13 05:22:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 05:22:43,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:43,573 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:43,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:22:43,573 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1211520361, now seen corresponding path program 31 times [2020-10-13 05:22:43,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:43,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258049749] [2020-10-13 05:22:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:43,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:43,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:48,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:22:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:22:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:49,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:49,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:49,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:49,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:49,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:49,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:49,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:49,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:49,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:49,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 05:22:49,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258049749] [2020-10-13 05:22:49,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:49,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:22:49,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193143947] [2020-10-13 05:22:49,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:22:49,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:22:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:49,300 INFO L87 Difference]: Start difference. First operand 276 states and 312 transitions. Second operand 36 states. [2020-10-13 05:22:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:49,731 INFO L93 Difference]: Finished difference Result 494 states and 570 transitions. [2020-10-13 05:22:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:22:49,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-10-13 05:22:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:49,734 INFO L225 Difference]: With dead ends: 494 [2020-10-13 05:22:49,734 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 05:22:49,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:22:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 05:22:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 284. [2020-10-13 05:22:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 05:22:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 321 transitions. [2020-10-13 05:22:49,744 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 321 transitions. Word has length 176 [2020-10-13 05:22:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:49,745 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 321 transitions. [2020-10-13 05:22:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:22:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 321 transitions. [2020-10-13 05:22:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 05:22:49,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:49,746 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:49,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:22:49,747 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1936148134, now seen corresponding path program 32 times [2020-10-13 05:22:49,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:49,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640712646] [2020-10-13 05:22:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:22:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:22:54,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:22:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:55,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:22:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:22:55,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:22:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:22:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:22:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 05:22:55,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640712646] [2020-10-13 05:22:55,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:22:55,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:22:55,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199262822] [2020-10-13 05:22:55,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:22:55,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:22:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:22:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:55,584 INFO L87 Difference]: Start difference. First operand 284 states and 321 transitions. Second operand 37 states. [2020-10-13 05:22:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:22:56,177 INFO L93 Difference]: Finished difference Result 508 states and 586 transitions. [2020-10-13 05:22:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:22:56,178 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 181 [2020-10-13 05:22:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:22:56,180 INFO L225 Difference]: With dead ends: 508 [2020-10-13 05:22:56,181 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 05:22:56,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:22:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 05:22:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 292. [2020-10-13 05:22:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-13 05:22:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-10-13 05:22:56,193 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 181 [2020-10-13 05:22:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:22:56,194 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-10-13 05:22:56,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:22:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-10-13 05:22:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 05:22:56,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:22:56,197 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:22:56,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:22:56,197 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:22:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:22:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash -610505395, now seen corresponding path program 33 times [2020-10-13 05:22:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:22:56,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711962261] [2020-10-13 05:22:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:22:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:22:56,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:22:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:01,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 05:23:01,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:23:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:01,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:01,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:01,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:01,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:01,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:01,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 05:23:01,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711962261] [2020-10-13 05:23:01,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:01,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:23:01,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519339925] [2020-10-13 05:23:01,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:23:01,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:01,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:23:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:23:01,982 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 38 states. [2020-10-13 05:23:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:02,425 INFO L93 Difference]: Finished difference Result 522 states and 602 transitions. [2020-10-13 05:23:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:23:02,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 186 [2020-10-13 05:23:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:02,427 INFO L225 Difference]: With dead ends: 522 [2020-10-13 05:23:02,427 INFO L226 Difference]: Without dead ends: 305 [2020-10-13 05:23:02,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:23:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-13 05:23:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 300. [2020-10-13 05:23:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-13 05:23:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 339 transitions. [2020-10-13 05:23:02,437 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 339 transitions. Word has length 186 [2020-10-13 05:23:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:02,437 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 339 transitions. [2020-10-13 05:23:02,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:23:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 339 transitions. [2020-10-13 05:23:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 05:23:02,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:02,439 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:02,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:23:02,440 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1161283210, now seen corresponding path program 34 times [2020-10-13 05:23:02,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:02,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988969780] [2020-10-13 05:23:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:02,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:23:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:23:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:08,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:08,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:08,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 05:23:08,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988969780] [2020-10-13 05:23:08,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:08,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:23:08,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426617544] [2020-10-13 05:23:08,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:23:08,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:23:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:08,397 INFO L87 Difference]: Start difference. First operand 300 states and 339 transitions. Second operand 39 states. [2020-10-13 05:23:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:08,896 INFO L93 Difference]: Finished difference Result 536 states and 618 transitions. [2020-10-13 05:23:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:23:08,896 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 191 [2020-10-13 05:23:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:08,899 INFO L225 Difference]: With dead ends: 536 [2020-10-13 05:23:08,899 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 05:23:08,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:23:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 05:23:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-10-13 05:23:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 05:23:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 348 transitions. [2020-10-13 05:23:08,908 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 348 transitions. Word has length 191 [2020-10-13 05:23:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:08,908 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 348 transitions. [2020-10-13 05:23:08,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:23:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 348 transitions. [2020-10-13 05:23:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-13 05:23:08,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:08,910 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:08,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:23:08,910 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2017453361, now seen corresponding path program 35 times [2020-10-13 05:23:08,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:08,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505294803] [2020-10-13 05:23:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:09,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 05:23:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:14,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-13 05:23:14,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505294803] [2020-10-13 05:23:14,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:14,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:23:14,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479013790] [2020-10-13 05:23:14,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:23:14,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:23:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:23:14,961 INFO L87 Difference]: Start difference. First operand 308 states and 348 transitions. Second operand 40 states. [2020-10-13 05:23:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:15,552 INFO L93 Difference]: Finished difference Result 550 states and 634 transitions. [2020-10-13 05:23:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:23:15,553 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 196 [2020-10-13 05:23:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:15,555 INFO L225 Difference]: With dead ends: 550 [2020-10-13 05:23:15,555 INFO L226 Difference]: Without dead ends: 321 [2020-10-13 05:23:15,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:23:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-13 05:23:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-10-13 05:23:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-13 05:23:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 357 transitions. [2020-10-13 05:23:15,564 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 357 transitions. Word has length 196 [2020-10-13 05:23:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:15,564 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 357 transitions. [2020-10-13 05:23:15,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:23:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 357 transitions. [2020-10-13 05:23:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 05:23:15,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:15,566 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:15,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:23:15,566 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1452882322, now seen corresponding path program 36 times [2020-10-13 05:23:15,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:15,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778201185] [2020-10-13 05:23:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:20,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:20,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 05:23:20,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 05:23:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:21,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:21,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:21,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:21,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:21,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:21,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:21,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:21,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:21,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-13 05:23:21,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778201185] [2020-10-13 05:23:21,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:21,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:23:21,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272246479] [2020-10-13 05:23:21,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:23:21,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:23:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:23:21,454 INFO L87 Difference]: Start difference. First operand 316 states and 357 transitions. Second operand 41 states. [2020-10-13 05:23:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:21,933 INFO L93 Difference]: Finished difference Result 564 states and 650 transitions. [2020-10-13 05:23:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:23:21,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 201 [2020-10-13 05:23:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:21,936 INFO L225 Difference]: With dead ends: 564 [2020-10-13 05:23:21,936 INFO L226 Difference]: Without dead ends: 329 [2020-10-13 05:23:21,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:23:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-13 05:23:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2020-10-13 05:23:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 05:23:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 366 transitions. [2020-10-13 05:23:21,944 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 366 transitions. Word has length 201 [2020-10-13 05:23:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:21,945 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 366 transitions. [2020-10-13 05:23:21,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:23:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 366 transitions. [2020-10-13 05:23:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-13 05:23:21,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:21,947 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:21,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:23:21,947 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 658701589, now seen corresponding path program 37 times [2020-10-13 05:23:21,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:21,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72044979] [2020-10-13 05:23:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:27,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:27,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 05:23:27,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:23:27,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:27,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:27,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:27,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:27,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:27,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:27,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:27,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-13 05:23:27,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72044979] [2020-10-13 05:23:27,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:27,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:23:27,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462540825] [2020-10-13 05:23:27,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:23:27,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:23:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:23:27,993 INFO L87 Difference]: Start difference. First operand 324 states and 366 transitions. Second operand 42 states. [2020-10-13 05:23:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:28,595 INFO L93 Difference]: Finished difference Result 578 states and 666 transitions. [2020-10-13 05:23:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:23:28,595 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 206 [2020-10-13 05:23:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:28,598 INFO L225 Difference]: With dead ends: 578 [2020-10-13 05:23:28,598 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 05:23:28,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:23:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 05:23:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 332. [2020-10-13 05:23:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-13 05:23:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 375 transitions. [2020-10-13 05:23:28,607 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 375 transitions. Word has length 206 [2020-10-13 05:23:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:28,607 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 375 transitions. [2020-10-13 05:23:28,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:23:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 375 transitions. [2020-10-13 05:23:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 05:23:28,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:28,609 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:28,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:23:28,609 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1017739694, now seen corresponding path program 38 times [2020-10-13 05:23:28,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:28,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764086033] [2020-10-13 05:23:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:28,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:33,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:23:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 05:23:33,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:34,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:34,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:34,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-13 05:23:34,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764086033] [2020-10-13 05:23:34,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:34,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:23:34,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086941153] [2020-10-13 05:23:34,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:23:34,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:23:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:23:34,559 INFO L87 Difference]: Start difference. First operand 332 states and 375 transitions. Second operand 43 states. [2020-10-13 05:23:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:35,184 INFO L93 Difference]: Finished difference Result 592 states and 682 transitions. [2020-10-13 05:23:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:23:35,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 211 [2020-10-13 05:23:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:35,187 INFO L225 Difference]: With dead ends: 592 [2020-10-13 05:23:35,187 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 05:23:35,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:23:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 05:23:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 340. [2020-10-13 05:23:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 05:23:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 384 transitions. [2020-10-13 05:23:35,196 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 384 transitions. Word has length 211 [2020-10-13 05:23:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:35,196 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 384 transitions. [2020-10-13 05:23:35,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:23:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 384 transitions. [2020-10-13 05:23:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-13 05:23:35,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:35,198 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:35,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:23:35,198 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2135422201, now seen corresponding path program 39 times [2020-10-13 05:23:35,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:35,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348134422] [2020-10-13 05:23:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:35,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:40,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:40,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-13 05:23:40,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5314 [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 05:23:40,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:41,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:41,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:41,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-13 05:23:41,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348134422] [2020-10-13 05:23:41,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:41,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:23:41,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003007629] [2020-10-13 05:23:41,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:23:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:23:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:23:41,502 INFO L87 Difference]: Start difference. First operand 340 states and 384 transitions. Second operand 44 states. [2020-10-13 05:23:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:42,122 INFO L93 Difference]: Finished difference Result 606 states and 698 transitions. [2020-10-13 05:23:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:23:42,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 216 [2020-10-13 05:23:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:42,124 INFO L225 Difference]: With dead ends: 606 [2020-10-13 05:23:42,124 INFO L226 Difference]: Without dead ends: 353 [2020-10-13 05:23:42,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:23:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-13 05:23:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 348. [2020-10-13 05:23:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-13 05:23:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 393 transitions. [2020-10-13 05:23:42,134 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 393 transitions. Word has length 216 [2020-10-13 05:23:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:42,135 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 393 transitions. [2020-10-13 05:23:42,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:23:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 393 transitions. [2020-10-13 05:23:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 05:23:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:42,137 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:42,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:23:42,137 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 169261514, now seen corresponding path program 40 times [2020-10-13 05:23:42,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:42,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117926064] [2020-10-13 05:23:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:42,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:42,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:47,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 05:23:47,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:48,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:48,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:48,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:48,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:48,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-10-13 05:23:48,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117926064] [2020-10-13 05:23:48,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:48,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:23:48,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961027959] [2020-10-13 05:23:48,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:23:48,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:23:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:23:48,242 INFO L87 Difference]: Start difference. First operand 348 states and 393 transitions. Second operand 45 states. [2020-10-13 05:23:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:48,893 INFO L93 Difference]: Finished difference Result 620 states and 714 transitions. [2020-10-13 05:23:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:23:48,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 221 [2020-10-13 05:23:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:48,896 INFO L225 Difference]: With dead ends: 620 [2020-10-13 05:23:48,896 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 05:23:48,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:23:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 05:23:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 356. [2020-10-13 05:23:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 05:23:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 402 transitions. [2020-10-13 05:23:48,906 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 402 transitions. Word has length 221 [2020-10-13 05:23:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:48,906 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 402 transitions. [2020-10-13 05:23:48,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:23:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 402 transitions. [2020-10-13 05:23:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-13 05:23:48,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:48,908 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:48,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:23:48,908 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 141626589, now seen corresponding path program 41 times [2020-10-13 05:23:48,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:48,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687516309] [2020-10-13 05:23:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:54,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:54,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-13 05:23:54,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:23:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-13 05:23:54,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:23:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:23:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:23:54,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:55,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:23:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:55,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:23:55,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:23:55,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:23:55,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:23:55,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:23:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:23:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:23:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:23:55,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:23:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-10-13 05:23:55,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687516309] [2020-10-13 05:23:55,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:23:55,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:23:55,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209785510] [2020-10-13 05:23:55,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:23:55,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:23:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:23:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:23:55,136 INFO L87 Difference]: Start difference. First operand 356 states and 402 transitions. Second operand 46 states. [2020-10-13 05:23:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:23:55,705 INFO L93 Difference]: Finished difference Result 634 states and 730 transitions. [2020-10-13 05:23:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:23:55,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 226 [2020-10-13 05:23:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:23:55,708 INFO L225 Difference]: With dead ends: 634 [2020-10-13 05:23:55,708 INFO L226 Difference]: Without dead ends: 369 [2020-10-13 05:23:55,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:23:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-13 05:23:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-10-13 05:23:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-13 05:23:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2020-10-13 05:23:55,718 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 226 [2020-10-13 05:23:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:23:55,718 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2020-10-13 05:23:55,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:23:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2020-10-13 05:23:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 05:23:55,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:23:55,720 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:23:55,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:23:55,721 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:23:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:23:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1199654426, now seen corresponding path program 42 times [2020-10-13 05:23:55,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:23:55,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779003082] [2020-10-13 05:23:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:23:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:23:55,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:23:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:00,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:00,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 05:24:00,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 05:24:00,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:01,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:24:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:24:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:24:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-10-13 05:24:01,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779003082] [2020-10-13 05:24:01,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:24:01,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:24:01,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819290742] [2020-10-13 05:24:01,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:24:01,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:24:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:24:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:24:01,973 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand 47 states. [2020-10-13 05:24:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:24:02,548 INFO L93 Difference]: Finished difference Result 648 states and 746 transitions. [2020-10-13 05:24:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:24:02,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 231 [2020-10-13 05:24:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:24:02,551 INFO L225 Difference]: With dead ends: 648 [2020-10-13 05:24:02,551 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 05:24:02,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:24:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 05:24:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-10-13 05:24:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-13 05:24:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 420 transitions. [2020-10-13 05:24:02,560 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 420 transitions. Word has length 231 [2020-10-13 05:24:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:24:02,563 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 420 transitions. [2020-10-13 05:24:02,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:24:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 420 transitions. [2020-10-13 05:24:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 05:24:02,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:24:02,565 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:24:02,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:24:02,565 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:24:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:24:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1604287295, now seen corresponding path program 43 times [2020-10-13 05:24:02,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:24:02,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765179279] [2020-10-13 05:24:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:24:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:24:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:24:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking...