/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:30:14,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:30:14,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:30:14,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:30:14,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:30:14,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:30:14,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:30:14,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:30:15,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:30:15,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:30:15,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:30:15,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:30:15,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:30:15,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:30:15,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:30:15,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:30:15,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:30:15,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:30:15,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:30:15,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:30:15,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:30:15,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:30:15,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:30:15,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:30:15,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:30:15,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:30:15,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:30:15,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:30:15,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:30:15,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:30:15,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:30:15,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:30:15,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:30:15,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:30:15,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:30:15,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:30:15,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:30:15,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:30:15,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:30:15,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:30:15,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:30:15,037 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 [2020-09-21 11:30:15,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:30:15,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:30:15,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:30:15,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:30:15,076 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:30:15,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:30:15,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:30:15,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:30:15,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:30:15,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:30:15,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:30:15,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:30:15,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:30:15,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:30:15,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:30:15,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:30:15,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:30:15,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:30:15,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:30:15,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:30:15,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:30:15,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:15,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:30:15,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:30:15,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:30:15,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:30:15,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:30:15,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:30:15,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:30:15,087 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:30:15,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:30:15,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:30:15,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:30:15,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:30:15,659 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:30:15,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-21 11:30:15,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600188351/b0a2d604f36b4493ae82abd1aa79bcca/FLAG7acb7ab3c [2020-09-21 11:30:16,345 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:30:16,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-21 11:30:16,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600188351/b0a2d604f36b4493ae82abd1aa79bcca/FLAG7acb7ab3c [2020-09-21 11:30:16,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600188351/b0a2d604f36b4493ae82abd1aa79bcca [2020-09-21 11:30:16,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:30:16,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:30:16,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:16,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:30:16,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:30:16,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:16" (1/1) ... [2020-09-21 11:30:16,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:16, skipping insertion in model container [2020-09-21 11:30:16,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:16" (1/1) ... [2020-09-21 11:30:16,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:30:16,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:30:16,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:17,011 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:30:17,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:17,064 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:30:17,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17 WrapperNode [2020-09-21 11:30:17,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:17,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:30:17,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:30:17,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:30:17,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... [2020-09-21 11:30:17,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:30:17,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:30:17,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:30:17,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:30:17,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:30:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:30:17,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:30:17,291 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-09-21 11:30:17,291 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-09-21 11:30:17,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:30:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:30:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:30:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:30:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-09-21 11:30:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:30:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-09-21 11:30:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:30:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:30:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:30:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:30:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:30:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:30:17,718 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:30:17,719 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-09-21 11:30:17,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:17 BoogieIcfgContainer [2020-09-21 11:30:17,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:30:17,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:30:17,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:30:17,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:30:17,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:30:16" (1/3) ... [2020-09-21 11:30:17,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433660c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:17, skipping insertion in model container [2020-09-21 11:30:17,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:17" (2/3) ... [2020-09-21 11:30:17,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433660c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:17, skipping insertion in model container [2020-09-21 11:30:17,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:17" (3/3) ... [2020-09-21 11:30:17,735 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-09-21 11:30:17,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:30:17,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:30:17,781 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:30:17,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:30:17,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:30:17,811 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:30:17,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:30:17,811 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:30:17,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:30:17,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:30:17,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:30:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-21 11:30:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:30:17,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:17,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:17,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:17,851 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-09-21 11:30:17,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:17,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161316821] [2020-09-21 11:30:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:18,025 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:18,026 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:18,026 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:18,026 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:18,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:30:18,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:18,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:30:18,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:18,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:30:18,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:18,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:18,138 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:18,138 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:18,138 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:18,139 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:18,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:18,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:18,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:18,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:18,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161316821] [2020-09-21 11:30:18,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:18,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:30:18,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114528516] [2020-09-21 11:30:18,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:30:18,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:30:18,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:30:18,187 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-09-21 11:30:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:18,542 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-09-21 11:30:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:30:18,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 11:30:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:18,559 INFO L225 Difference]: With dead ends: 150 [2020-09-21 11:30:18,560 INFO L226 Difference]: Without dead ends: 89 [2020-09-21 11:30:18,565 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 [2020-09-21 11:30:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-21 11:30:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-09-21 11:30:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:30:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-09-21 11:30:18,636 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-09-21 11:30:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:18,637 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-09-21 11:30:18,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:30:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-09-21 11:30:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:30:18,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:18,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:18,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:30:18,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-09-21 11:30:18,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:18,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888217514] [2020-09-21 11:30:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:18,675 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:18,676 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:18,676 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:18,677 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:18,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:30:18,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:18,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:30:18,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:18,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:18,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:30:18,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:18,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:18,746 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:18,746 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:18,746 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:18,747 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:18,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:18,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888217514] [2020-09-21 11:30:18,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:18,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:30:18,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658406168] [2020-09-21 11:30:18,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:18,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:18,761 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-09-21 11:30:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:19,148 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-09-21 11:30:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:30:19,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 11:30:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:19,152 INFO L225 Difference]: With dead ends: 170 [2020-09-21 11:30:19,152 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 11:30:19,154 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 [2020-09-21 11:30:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 11:30:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-09-21 11:30:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 11:30:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-09-21 11:30:19,168 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-09-21 11:30:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:19,169 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-09-21 11:30:19,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-09-21 11:30:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:30:19,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:19,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:30:19,172 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-09-21 11:30:19,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:19,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498322789] [2020-09-21 11:30:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:19,225 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:19,225 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:19,225 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:19,226 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:19,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:30:19,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:19,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:30:19,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:19,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:30:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:19,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:19,286 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:19,286 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:19,287 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:19,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:19,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:19,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:19,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498322789] [2020-09-21 11:30:19,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:19,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:30:19,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946918684] [2020-09-21 11:30:19,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:30:19,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:30:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:19,304 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-09-21 11:30:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:19,643 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-09-21 11:30:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:30:19,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 11:30:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:19,647 INFO L225 Difference]: With dead ends: 203 [2020-09-21 11:30:19,647 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 11:30:19,649 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 [2020-09-21 11:30:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 11:30:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-09-21 11:30:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 11:30:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-09-21 11:30:19,663 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-09-21 11:30:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:19,663 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-09-21 11:30:19,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:30:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-09-21 11:30:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:30:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:19,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:19,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:30:19,665 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-09-21 11:30:19,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:19,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782412385] [2020-09-21 11:30:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:19,727 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:19,727 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:19,727 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:19,729 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:19,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:30:19,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:19,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:30:19,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:30:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:30:19,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:19,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:19,792 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:19,792 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:19,793 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:19,793 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:19,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:19,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:19,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:19,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:19,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782412385] [2020-09-21 11:30:19,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:19,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:30:19,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912538991] [2020-09-21 11:30:19,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:30:19,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:30:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:30:19,803 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-09-21 11:30:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:20,225 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-09-21 11:30:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:30:20,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 11:30:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:20,228 INFO L225 Difference]: With dead ends: 236 [2020-09-21 11:30:20,228 INFO L226 Difference]: Without dead ends: 188 [2020-09-21 11:30:20,230 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 [2020-09-21 11:30:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-21 11:30:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-09-21 11:30:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 11:30:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-09-21 11:30:20,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-09-21 11:30:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:20,243 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-09-21 11:30:20,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:30:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-09-21 11:30:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:30:20,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:20,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:20,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:30:20,245 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-09-21 11:30:20,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:20,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523436785] [2020-09-21 11:30:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,286 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,286 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:30:20,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:30:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:30:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,370 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,371 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,371 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,371 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:20,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:20,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:30:20,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523436785] [2020-09-21 11:30:20,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:20,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:30:20,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620773404] [2020-09-21 11:30:20,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:20,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:20,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:20,380 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-09-21 11:30:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:20,507 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-09-21 11:30:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:30:20,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 11:30:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:20,509 INFO L225 Difference]: With dead ends: 116 [2020-09-21 11:30:20,509 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 11:30:20,510 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 [2020-09-21 11:30:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 11:30:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-09-21 11:30:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 11:30:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-09-21 11:30:20,519 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-09-21 11:30:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:20,520 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-09-21 11:30:20,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-09-21 11:30:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:30:20,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:20,522 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:20,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:30:20,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-09-21 11:30:20,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:20,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111310053] [2020-09-21 11:30:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,566 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,568 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,569 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:30:20,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:30:20,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:20,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,657 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:20,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:20,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:30:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,666 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,666 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,666 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,666 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:20,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:20,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:20,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:30:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:20,685 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:20,685 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:20,685 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:20,686 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:20,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:20,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:20,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:20,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:20,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:20,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:20,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:20,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:20,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111310053] [2020-09-21 11:30:20,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:20,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:30:20,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154871340] [2020-09-21 11:30:20,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:30:20,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:30:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:30:20,695 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-09-21 11:30:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,071 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-09-21 11:30:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:30:21,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-21 11:30:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,073 INFO L225 Difference]: With dead ends: 223 [2020-09-21 11:30:21,073 INFO L226 Difference]: Without dead ends: 173 [2020-09-21 11:30:21,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-21 11:30:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-09-21 11:30:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:30:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-09-21 11:30:21,085 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-09-21 11:30:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,085 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-09-21 11:30:21,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:30:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-09-21 11:30:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:30:21,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,087 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:30:21,088 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-09-21 11:30:21,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126147608] [2020-09-21 11:30:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,171 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,171 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,172 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,175 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 11:30:21,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:30:21,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:30:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:30:21,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,238 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,238 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,238 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:30:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,246 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,246 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,246 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,247 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:21,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:30:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,261 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,261 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,262 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,262 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126147608] [2020-09-21 11:30:21,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:21,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:30:21,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558443731] [2020-09-21 11:30:21,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:30:21,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:30:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:30:21,271 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-09-21 11:30:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,779 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-09-21 11:30:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:30:21,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 11:30:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,781 INFO L225 Difference]: With dead ends: 246 [2020-09-21 11:30:21,781 INFO L226 Difference]: Without dead ends: 196 [2020-09-21 11:30:21,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-21 11:30:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-09-21 11:30:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 11:30:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-09-21 11:30:21,794 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-09-21 11:30:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,794 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-09-21 11:30:21,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:30:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-09-21 11:30:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:30:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:30:21,797 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-09-21 11:30:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425101943] [2020-09-21 11:30:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,837 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,838 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,838 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,838 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:21,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:30:21,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,946 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,947 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,947 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,947 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 11:30:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,953 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 11:30:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,975 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,976 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,976 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,976 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425101943] [2020-09-21 11:30:21,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:21,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:30:21,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917257600] [2020-09-21 11:30:21,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:30:21,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:30:21,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:21,985 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-09-21 11:30:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,522 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-09-21 11:30:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:30:22,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-21 11:30:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,524 INFO L225 Difference]: With dead ends: 269 [2020-09-21 11:30:22,525 INFO L226 Difference]: Without dead ends: 219 [2020-09-21 11:30:22,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:30:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-21 11:30:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-09-21 11:30:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 11:30:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-09-21 11:30:22,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-09-21 11:30:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,546 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-09-21 11:30:22,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:30:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-09-21 11:30:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:30:22,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,554 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:30:22,555 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-09-21 11:30:22,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050906401] [2020-09-21 11:30:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,603 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,603 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,603 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,604 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-21 11:30:22,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:30:22,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:30:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:22,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:30:22,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,708 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,708 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,708 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,708 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:30:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,720 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,720 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,721 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:22,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:30:22,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:22,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:30:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,755 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,756 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,756 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,756 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050906401] [2020-09-21 11:30:22,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:30:22,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091853793] [2020-09-21 11:30:22,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:30:22,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:30:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:22,778 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-09-21 11:30:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,419 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-09-21 11:30:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:30:23,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-21 11:30:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,422 INFO L225 Difference]: With dead ends: 292 [2020-09-21 11:30:23,423 INFO L226 Difference]: Without dead ends: 242 [2020-09-21 11:30:23,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:30:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-21 11:30:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-09-21 11:30:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 11:30:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-09-21 11:30:23,456 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-09-21 11:30:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,457 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-09-21 11:30:23,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:30:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-09-21 11:30:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:30:23,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,458 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:30:23,459 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-09-21 11:30:23,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080202233] [2020-09-21 11:30:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,508 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,508 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,508 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,508 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 11:30:23,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:30:23,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:30:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:23,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:30:23,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,615 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,616 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,616 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,616 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:30:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,622 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,622 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,622 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,622 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:23,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:23,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:30:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,638 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,638 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,638 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,638 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:23,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080202233] [2020-09-21 11:30:23,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:23,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:30:23,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386857337] [2020-09-21 11:30:23,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:30:23,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:30:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:30:23,648 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-09-21 11:30:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:24,397 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-09-21 11:30:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:30:24,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-21 11:30:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:24,401 INFO L225 Difference]: With dead ends: 315 [2020-09-21 11:30:24,401 INFO L226 Difference]: Without dead ends: 265 [2020-09-21 11:30:24,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:30:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-21 11:30:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-09-21 11:30:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 11:30:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-09-21 11:30:24,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-09-21 11:30:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:24,411 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-09-21 11:30:24,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:30:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-09-21 11:30:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 11:30:24,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:24,413 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:24,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:30:24,414 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-09-21 11:30:24,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:24,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806489045] [2020-09-21 11:30:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,459 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,459 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,459 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,460 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:30:24,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:30:24,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:30:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:30:24,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,574 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:24,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:30:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,581 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,581 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,581 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,581 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:24,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:24,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:30:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,599 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,599 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,599 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,600 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:24,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:24,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806489045] [2020-09-21 11:30:24,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:24,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:30:24,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396661259] [2020-09-21 11:30:24,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:30:24,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:30:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:30:24,609 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-09-21 11:30:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:25,313 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-09-21 11:30:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:30:25,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-09-21 11:30:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:25,317 INFO L225 Difference]: With dead ends: 338 [2020-09-21 11:30:25,317 INFO L226 Difference]: Without dead ends: 288 [2020-09-21 11:30:25,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:30:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-21 11:30:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-09-21 11:30:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 11:30:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-09-21 11:30:25,327 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-09-21 11:30:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:25,327 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-09-21 11:30:25,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:30:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-09-21 11:30:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 11:30:25,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:25,329 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:25,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:30:25,329 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:25,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-09-21 11:30:25,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:25,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324623436] [2020-09-21 11:30:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,385 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,386 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,386 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:30:25,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,524 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,525 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,525 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,525 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:25,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:25,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:25,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:25,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 11:30:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,533 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,533 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,533 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:25,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:30:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:25,568 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:25,568 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:25,569 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:25,569 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:25,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:25,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:25,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:25,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324623436] [2020-09-21 11:30:25,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:25,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:30:25,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894432367] [2020-09-21 11:30:25,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:30:25,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:30:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:30:25,581 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-09-21 11:30:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:26,432 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-09-21 11:30:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:30:26,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-21 11:30:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:26,436 INFO L225 Difference]: With dead ends: 361 [2020-09-21 11:30:26,436 INFO L226 Difference]: Without dead ends: 311 [2020-09-21 11:30:26,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:30:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-09-21 11:30:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-09-21 11:30:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 11:30:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-09-21 11:30:26,448 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-09-21 11:30:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:26,451 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-09-21 11:30:26,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:30:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-09-21 11:30:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:30:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:26,453 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:26,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:30:26,454 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-09-21 11:30:26,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:26,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423220481] [2020-09-21 11:30:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,533 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,533 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,533 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-21 11:30:26,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 11:30:26,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:30:26,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:26,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:30:26,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,691 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:26,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:30:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,699 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,699 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,699 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,700 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:26,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:30:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:26,717 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:26,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:26,718 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:26,718 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:26,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:26,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:26,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:26,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:26,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:26,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:26,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423220481] [2020-09-21 11:30:26,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:26,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:30:26,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967356211] [2020-09-21 11:30:26,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:30:26,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:30:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:30:26,727 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-09-21 11:30:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:27,685 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-09-21 11:30:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:30:27,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-09-21 11:30:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:27,691 INFO L225 Difference]: With dead ends: 384 [2020-09-21 11:30:27,692 INFO L226 Difference]: Without dead ends: 334 [2020-09-21 11:30:27,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:30:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-21 11:30:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-09-21 11:30:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 11:30:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-09-21 11:30:27,710 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-09-21 11:30:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:27,710 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-09-21 11:30:27,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:30:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-09-21 11:30:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:30:27,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:27,714 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:27,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:30:27,714 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-09-21 11:30:27,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:27,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705771859] [2020-09-21 11:30:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:27,812 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:30:27,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:27,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 11:30:27,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:27,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:30:27,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:27,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:30:27,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:28,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,006 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,006 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,006 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,007 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:28,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:28,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:28,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:30:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,014 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,014 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,014 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,015 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:28,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:28,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:28,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:28,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:28,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:30:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:28,039 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:28,039 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:28,039 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:28,040 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:28,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:28,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:28,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:28,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705771859] [2020-09-21 11:30:28,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:28,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:30:28,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323757580] [2020-09-21 11:30:28,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:30:28,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:30:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:30:28,051 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-09-21 11:30:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:28,923 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-09-21 11:30:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:30:28,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-09-21 11:30:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:28,927 INFO L225 Difference]: With dead ends: 407 [2020-09-21 11:30:28,927 INFO L226 Difference]: Without dead ends: 357 [2020-09-21 11:30:28,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:30:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-09-21 11:30:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-09-21 11:30:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 11:30:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-09-21 11:30:28,938 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-09-21 11:30:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:28,938 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-09-21 11:30:28,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:30:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-09-21 11:30:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 11:30:28,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:28,939 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:28,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:30:28,939 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-09-21 11:30:28,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:28,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442526054] [2020-09-21 11:30:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,002 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,002 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,003 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,003 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:30:29,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 11:30:29,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:30:29,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:29,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:30:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:29,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,171 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,171 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,171 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,172 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:29,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:29,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:29,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:30:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,179 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:29,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:29,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:29,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:29,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 11:30:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:29,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:29,229 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:29,230 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:29,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:29,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:29,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:29,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:29,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:29,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:29,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:29,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:29,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442526054] [2020-09-21 11:30:29,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:29,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:30:29,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140412135] [2020-09-21 11:30:29,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:30:29,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:30:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:30:29,246 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-09-21 11:30:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:30,195 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-09-21 11:30:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:30:30,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-09-21 11:30:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:30,198 INFO L225 Difference]: With dead ends: 430 [2020-09-21 11:30:30,198 INFO L226 Difference]: Without dead ends: 380 [2020-09-21 11:30:30,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:30:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-21 11:30:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-09-21 11:30:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 11:30:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-09-21 11:30:30,208 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-09-21 11:30:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:30,208 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-09-21 11:30:30,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:30:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-09-21 11:30:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 11:30:30,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:30,209 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:30,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:30:30,209 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-09-21 11:30:30,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:30,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187649593] [2020-09-21 11:30:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,275 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,276 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,276 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,276 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:30:30,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:30:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:30,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,499 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,499 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,499 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,500 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:30,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:30:30,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:30,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:30:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,510 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,510 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,510 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:30,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:30,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:30,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 11:30:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:30,527 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:30,527 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:30,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:30,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:30,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187649593] [2020-09-21 11:30:30,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:30,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:30:30,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265118388] [2020-09-21 11:30:30,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:30:30,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:30:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:30:30,541 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-09-21 11:30:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:31,529 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-09-21 11:30:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:30:31,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-09-21 11:30:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:31,533 INFO L225 Difference]: With dead ends: 453 [2020-09-21 11:30:31,534 INFO L226 Difference]: Without dead ends: 403 [2020-09-21 11:30:31,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:30:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-09-21 11:30:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-09-21 11:30:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 11:30:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-09-21 11:30:31,544 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-09-21 11:30:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:31,544 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-09-21 11:30:31,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:30:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-09-21 11:30:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 11:30:31,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:31,545 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:31,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:30:31,546 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:31,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-09-21 11:30:31,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:31,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687767779] [2020-09-21 11:30:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,619 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,619 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,619 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:30:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:30:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:31,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:31,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:30:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,868 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,868 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,868 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 11:30:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:31,893 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:31,893 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:31,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:31,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687767779] [2020-09-21 11:30:31,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:31,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:30:31,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323314333] [2020-09-21 11:30:31,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:30:31,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:30:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:30:31,903 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-09-21 11:30:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:33,034 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-09-21 11:30:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:30:33,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-09-21 11:30:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:33,038 INFO L225 Difference]: With dead ends: 476 [2020-09-21 11:30:33,038 INFO L226 Difference]: Without dead ends: 426 [2020-09-21 11:30:33,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:30:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-21 11:30:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-09-21 11:30:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 11:30:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-09-21 11:30:33,053 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-09-21 11:30:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:33,054 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-09-21 11:30:33,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:30:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-09-21 11:30:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 11:30:33,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:33,055 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:33,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:30:33,056 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-09-21 11:30:33,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:33,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524837463] [2020-09-21 11:30:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,152 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,152 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-21 11:30:33,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:30:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:30:33,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:33,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,371 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,371 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,371 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,371 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:33,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:33,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:33,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:33,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:33,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:33,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:30:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:33,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:33,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:33,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 11:30:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:33,396 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:33,397 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:33,397 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:33,397 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:33,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:33,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:33,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:33,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524837463] [2020-09-21 11:30:33,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:33,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:30:33,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859687102] [2020-09-21 11:30:33,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:30:33,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:30:33,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:30:33,414 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-09-21 11:30:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:34,774 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-09-21 11:30:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:30:34,775 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-21 11:30:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:34,777 INFO L225 Difference]: With dead ends: 499 [2020-09-21 11:30:34,778 INFO L226 Difference]: Without dead ends: 449 [2020-09-21 11:30:34,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:30:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-09-21 11:30:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-09-21 11:30:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:30:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-09-21 11:30:34,789 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-09-21 11:30:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:34,789 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-09-21 11:30:34,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:30:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-09-21 11:30:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 11:30:34,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:34,790 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:34,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:30:34,791 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-09-21 11:30:34,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:34,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925438530] [2020-09-21 11:30:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:34,894 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:34,894 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:34,894 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:34,895 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:34,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 11:30:34,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-21 11:30:34,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:30:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:34,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:30:34,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,196 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,197 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:35,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:35,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 11:30:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,203 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,203 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,203 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,203 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:35,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:35,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:35,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:35,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 11:30:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:35,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:35,230 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:35,230 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:35,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:35,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:35,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:35,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:35,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:35,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925438530] [2020-09-21 11:30:35,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:35,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:30:35,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595012453] [2020-09-21 11:30:35,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:30:35,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:35,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:30:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:30:35,241 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-09-21 11:30:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:36,856 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-09-21 11:30:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:30:36,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-09-21 11:30:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:36,862 INFO L225 Difference]: With dead ends: 522 [2020-09-21 11:30:36,862 INFO L226 Difference]: Without dead ends: 472 [2020-09-21 11:30:36,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:30:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-09-21 11:30:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-09-21 11:30:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 11:30:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-09-21 11:30:36,881 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-09-21 11:30:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:36,881 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-09-21 11:30:36,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:30:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-09-21 11:30:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 11:30:36,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:36,883 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:36,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:30:36,884 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-09-21 11:30:36,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:36,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255709400] [2020-09-21 11:30:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:36,998 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:36,999 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:36,999 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:36,999 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:37,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-21 11:30:37,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-21 11:30:37,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:30:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:30:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:37,449 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:37,450 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:37,450 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:37,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:37,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:37,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:37,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 11:30:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:37,457 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:37,458 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:37,458 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:37,458 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:37,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:37,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:37,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:37,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:37,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:37,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:37,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:37,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:37,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 11:30:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:37,482 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:37,482 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:37,482 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:37,483 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:37,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:37,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:37,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:37,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:37,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:37,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255709400] [2020-09-21 11:30:37,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:37,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:30:37,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110814753] [2020-09-21 11:30:37,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:30:37,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:30:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:30:37,502 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-09-21 11:30:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:38,996 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-09-21 11:30:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:30:38,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-09-21 11:30:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:39,000 INFO L225 Difference]: With dead ends: 545 [2020-09-21 11:30:39,000 INFO L226 Difference]: Without dead ends: 495 [2020-09-21 11:30:39,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:30:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-09-21 11:30:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-09-21 11:30:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 11:30:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-09-21 11:30:39,012 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-09-21 11:30:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:39,012 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-09-21 11:30:39,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:30:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-09-21 11:30:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-21 11:30:39,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:39,014 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:39,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:30:39,014 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:39,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-09-21 11:30:39,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:39,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734484012] [2020-09-21 11:30:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,111 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,111 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 11:30:39,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:30:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,499 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,499 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,499 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,500 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:39,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:39,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:39,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 11:30:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,508 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,508 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,509 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,509 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:39,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:39,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:39,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 11:30:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:39,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:39,532 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:39,533 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:39,533 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:39,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:39,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:39,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:39,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:39,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:39,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734484012] [2020-09-21 11:30:39,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:39,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:30:39,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785203768] [2020-09-21 11:30:39,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:30:39,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:39,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:30:39,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:30:39,551 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-09-21 11:30:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:41,094 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-09-21 11:30:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:30:41,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-09-21 11:30:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:41,097 INFO L225 Difference]: With dead ends: 568 [2020-09-21 11:30:41,098 INFO L226 Difference]: Without dead ends: 518 [2020-09-21 11:30:41,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:30:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-09-21 11:30:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-09-21 11:30:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 11:30:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-09-21 11:30:41,109 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-09-21 11:30:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:41,110 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-09-21 11:30:41,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:30:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-09-21 11:30:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 11:30:41,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:41,111 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:41,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:30:41,111 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-09-21 11:30:41,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:41,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056656142] [2020-09-21 11:30:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:41,241 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:41,242 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:41,242 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:41,242 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:41,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 11:30:41,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:41,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 11:30:41,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:30:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:30:41,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:41,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:41,590 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:41,590 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:41,590 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:41,590 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:41,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:41,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:41,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:41,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:41,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:41,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 11:30:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:41,597 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:41,597 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:41,597 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:41,597 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:41,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:41,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:41,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:41,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:41,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:41,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:41,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:41,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:41,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 11:30:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:41,627 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:41,627 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:41,627 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:41,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:41,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:41,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:41,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056656142] [2020-09-21 11:30:41,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:41,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:30:41,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525527671] [2020-09-21 11:30:41,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:30:41,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:30:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:30:41,647 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-09-21 11:30:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:43,100 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-09-21 11:30:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:30:43,102 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-09-21 11:30:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:43,106 INFO L225 Difference]: With dead ends: 591 [2020-09-21 11:30:43,107 INFO L226 Difference]: Without dead ends: 541 [2020-09-21 11:30:43,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:30:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-09-21 11:30:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-09-21 11:30:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-21 11:30:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-09-21 11:30:43,118 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-09-21 11:30:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:43,118 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-09-21 11:30:43,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:30:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-09-21 11:30:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 11:30:43,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:43,120 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:43,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:30:43,120 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-09-21 11:30:43,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:43,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918361807] [2020-09-21 11:30:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,219 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,219 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,220 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,220 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-21 11:30:43,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-21 11:30:43,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:30:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:43,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 11:30:43,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,670 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,671 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,671 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:43,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:43,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 11:30:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,679 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,680 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:43,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:43,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:43,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 11:30:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:43,709 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:43,710 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:43,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:43,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:43,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:43,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:43,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918361807] [2020-09-21 11:30:43,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:43,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:30:43,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745704444] [2020-09-21 11:30:43,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:30:43,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:30:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:30:43,728 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-09-21 11:30:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:45,310 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-09-21 11:30:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:30:45,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-09-21 11:30:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:45,313 INFO L225 Difference]: With dead ends: 614 [2020-09-21 11:30:45,313 INFO L226 Difference]: Without dead ends: 564 [2020-09-21 11:30:45,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:30:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-09-21 11:30:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-09-21 11:30:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-21 11:30:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-09-21 11:30:45,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-09-21 11:30:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:45,325 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-09-21 11:30:45,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:30:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-09-21 11:30:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 11:30:45,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:45,327 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:45,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:30:45,327 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-09-21 11:30:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239849853] [2020-09-21 11:30:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:45,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:45,444 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:45,444 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:45,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:45,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-21 11:30:45,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:45,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:30:45,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:45,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:30:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:30:45,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:45,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:45,941 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:45,941 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:45,942 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:45,942 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:45,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:45,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:45,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:45,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:45,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:45,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:45,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:45,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:45,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 11:30:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:45,949 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:45,950 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:45,950 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:45,950 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:45,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:45,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:45,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 11:30:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:45,981 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:45,982 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:45,982 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:45,982 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:45,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:45,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:45,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:45,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:45,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:45,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:45,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:45,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239849853] [2020-09-21 11:30:45,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:45,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:30:45,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699290922] [2020-09-21 11:30:45,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:30:45,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:30:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:30:46,000 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-09-21 11:30:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:48,077 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-09-21 11:30:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:30:48,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-09-21 11:30:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:48,080 INFO L225 Difference]: With dead ends: 637 [2020-09-21 11:30:48,080 INFO L226 Difference]: Without dead ends: 587 [2020-09-21 11:30:48,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:30:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-21 11:30:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-09-21 11:30:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-21 11:30:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-09-21 11:30:48,097 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-09-21 11:30:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:48,097 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-09-21 11:30:48,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:30:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-09-21 11:30:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 11:30:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:48,098 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:48,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:30:48,099 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:48,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-09-21 11:30:48,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:48,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682400918] [2020-09-21 11:30:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:48,233 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:48,234 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:48,234 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:48,234 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:48,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:30:48,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:48,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:48,694 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:48,695 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:48,695 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:48,695 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:48,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:48,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 11:30:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:48,699 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:48,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 11:30:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:48,728 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:48,728 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:48,728 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:48,728 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:48,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682400918] [2020-09-21 11:30:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:48,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:30:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110269509] [2020-09-21 11:30:48,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:30:48,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:30:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:30:48,740 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-09-21 11:30:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:50,880 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-09-21 11:30:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:30:50,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-21 11:30:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:50,884 INFO L225 Difference]: With dead ends: 660 [2020-09-21 11:30:50,884 INFO L226 Difference]: Without dead ends: 610 [2020-09-21 11:30:50,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:30:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-09-21 11:30:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-09-21 11:30:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 11:30:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-09-21 11:30:50,895 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-09-21 11:30:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:50,895 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-09-21 11:30:50,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:30:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-09-21 11:30:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 11:30:50,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:50,896 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:50,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:30:50,897 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-09-21 11:30:50,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:50,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370476239] [2020-09-21 11:30:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:51,018 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:51,018 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:51,018 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:51,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 11:30:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:51,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:51,517 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:51,517 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:51,517 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:51,517 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:51,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:51,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:51,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 11:30:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:51,523 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:51,523 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:51,523 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:51,523 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:51,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:51,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:51,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:51,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:51,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 11:30:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:51,550 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:51,550 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:51,550 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:51,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:51,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370476239] [2020-09-21 11:30:51,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:51,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:30:51,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676195577] [2020-09-21 11:30:51,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:30:51,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:30:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:30:51,561 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-09-21 11:30:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:53,675 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-09-21 11:30:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:30:53,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-09-21 11:30:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:53,678 INFO L225 Difference]: With dead ends: 683 [2020-09-21 11:30:53,678 INFO L226 Difference]: Without dead ends: 633 [2020-09-21 11:30:53,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:30:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-09-21 11:30:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-09-21 11:30:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-21 11:30:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-09-21 11:30:53,689 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-09-21 11:30:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:53,689 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-09-21 11:30:53,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:30:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-09-21 11:30:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 11:30:53,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:53,691 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:53,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:30:53,691 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:53,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-09-21 11:30:53,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:53,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176232086] [2020-09-21 11:30:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:53,826 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:53,826 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:53,826 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:53,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:53,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-21 11:30:53,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:53,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 11:30:53,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:30:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:53,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-21 11:30:53,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:54,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:54,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:54,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 11:30:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:54,340 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:54,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 11:30:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:54,368 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:54,368 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:54,368 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:54,368 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:54,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:54,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:54,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176232086] [2020-09-21 11:30:54,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:54,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:30:54,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154589870] [2020-09-21 11:30:54,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:30:54,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:30:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:30:54,380 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-09-21 11:30:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:56,879 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-09-21 11:30:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:30:56,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-09-21 11:30:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:56,882 INFO L225 Difference]: With dead ends: 706 [2020-09-21 11:30:56,882 INFO L226 Difference]: Without dead ends: 656 [2020-09-21 11:30:56,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:30:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-09-21 11:30:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-09-21 11:30:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-21 11:30:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-09-21 11:30:56,893 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-09-21 11:30:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:56,893 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-09-21 11:30:56,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:30:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-09-21 11:30:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 11:30:56,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:56,894 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:56,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:30:56,895 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-09-21 11:30:56,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:56,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400464112] [2020-09-21 11:30:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:57,033 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:57,033 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 11:30:57,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:30:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:30:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:30:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:57,564 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:57,564 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:57,564 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:57,565 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:57,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:57,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:57,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:57,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 11:30:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:57,571 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:57,571 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:57,571 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:57,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:57,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:30:57,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:57,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:57,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:30:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:57,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:57,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 11:30:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:57,597 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:57,597 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:57,597 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:57,598 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:57,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:57,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:57,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:57,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:30:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:57,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:57,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400464112] [2020-09-21 11:30:57,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:57,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:30:57,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490171927] [2020-09-21 11:30:57,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:30:57,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:30:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:30:57,611 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-09-21 11:31:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:00,496 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-09-21 11:31:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:31:00,497 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-09-21 11:31:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:00,503 INFO L225 Difference]: With dead ends: 729 [2020-09-21 11:31:00,503 INFO L226 Difference]: Without dead ends: 679 [2020-09-21 11:31:00,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:31:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-09-21 11:31:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-09-21 11:31:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-21 11:31:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-09-21 11:31:00,521 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-09-21 11:31:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:00,521 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-09-21 11:31:00,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:31:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-09-21 11:31:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 11:31:00,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:00,524 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:00,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:31:00,524 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-09-21 11:31:00,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:00,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234846993] [2020-09-21 11:31:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:00,719 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:00,719 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:00,720 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:00,720 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 11:31:00,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-21 11:31:00,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:31:00,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:00,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:31:00,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:01,467 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:01,468 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:01,468 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:01,468 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:01,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:01,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:01,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:01,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:01,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 11:31:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:01,476 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:01,476 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:01,477 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:01,477 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:01,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:31:01,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:01,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:31:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:01,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:01,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 11:31:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:01,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:01,515 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:01,515 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:01,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:01,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:01,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:01,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:01,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:01,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:01,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:01,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:01,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:01,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234846993] [2020-09-21 11:31:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:31:01,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769167180] [2020-09-21 11:31:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:31:01,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:31:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:31:01,537 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-09-21 11:31:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:03,946 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-09-21 11:31:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:31:03,946 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-09-21 11:31:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:03,949 INFO L225 Difference]: With dead ends: 752 [2020-09-21 11:31:03,949 INFO L226 Difference]: Without dead ends: 702 [2020-09-21 11:31:03,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:31:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-09-21 11:31:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-09-21 11:31:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-21 11:31:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-09-21 11:31:03,964 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-09-21 11:31:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:03,964 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-09-21 11:31:03,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:31:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-09-21 11:31:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 11:31:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:03,965 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:03,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:31:03,966 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-09-21 11:31:03,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:03,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559513274] [2020-09-21 11:31:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,016 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,016 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,017 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,017 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-21 11:31:04,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:04,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-09-21 11:31:04,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,062 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 11:31:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,068 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,068 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:04,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:31:04,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 11:31:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,079 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,079 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-09-21 11:31:04,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559513274] [2020-09-21 11:31:04,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:04,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:31:04,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082440945] [2020-09-21 11:31:04,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:04,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:04,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:04,090 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-09-21 11:31:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:04,253 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-09-21 11:31:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:04,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-09-21 11:31:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:04,255 INFO L225 Difference]: With dead ends: 177 [2020-09-21 11:31:04,256 INFO L226 Difference]: Without dead ends: 132 [2020-09-21 11:31:04,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-21 11:31:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-09-21 11:31:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-21 11:31:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-09-21 11:31:04,263 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-09-21 11:31:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:04,264 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-09-21 11:31:04,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-09-21 11:31:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 11:31:04,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:04,265 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:04,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:31:04,265 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-09-21 11:31:04,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:04,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020987593] [2020-09-21 11:31:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,304 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,304 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:04,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-09-21 11:31:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:04,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,352 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,352 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,352 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 11:31:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,361 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,362 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,362 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,362 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:31:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:04,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:31:04,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 11:31:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,375 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,375 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,375 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,376 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-09-21 11:31:04,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020987593] [2020-09-21 11:31:04,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:04,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:04,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067674807] [2020-09-21 11:31:04,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:04,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:04,386 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-09-21 11:31:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:04,591 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-09-21 11:31:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:04,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-09-21 11:31:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:04,594 INFO L225 Difference]: With dead ends: 200 [2020-09-21 11:31:04,594 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 11:31:04,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 11:31:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-09-21 11:31:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-21 11:31:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-21 11:31:04,600 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-09-21 11:31:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:04,600 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-21 11:31:04,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-21 11:31:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 11:31:04,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:04,601 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:04,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:31:04,602 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-09-21 11:31:04,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:04,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110801305] [2020-09-21 11:31:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,645 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,646 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,646 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-21 11:31:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:04,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-09-21 11:31:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,710 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,710 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 11:31:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,722 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,723 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,723 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:31:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 11:31:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:04,743 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:04,743 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:04,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:04,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:04,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:04,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:04,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:04,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:04,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:04,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-09-21 11:31:04,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110801305] [2020-09-21 11:31:04,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:04,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:04,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526464974] [2020-09-21 11:31:04,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:04,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:04,756 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-09-21 11:31:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:04,959 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-09-21 11:31:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:04,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-09-21 11:31:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:04,962 INFO L225 Difference]: With dead ends: 187 [2020-09-21 11:31:04,962 INFO L226 Difference]: Without dead ends: 139 [2020-09-21 11:31:04,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-21 11:31:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-09-21 11:31:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-21 11:31:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-09-21 11:31:04,971 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-09-21 11:31:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:04,972 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-09-21 11:31:04,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-09-21 11:31:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 11:31:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:04,974 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:04,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:31:04,974 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-09-21 11:31:04,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:04,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156142536] [2020-09-21 11:31:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,067 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,068 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,068 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,068 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-21 11:31:05,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:31:05,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-21 11:31:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,143 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,143 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,144 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,144 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:05,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:05,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:05,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:05,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:05,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 11:31:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,158 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,158 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,159 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,159 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:31:05,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:05,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:31:05,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:31:05,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 11:31:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:05,198 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:05,199 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:05,199 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:05,199 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:05,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:05,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:05,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:05,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:31:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-09-21 11:31:05,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156142536] [2020-09-21 11:31:05,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:05,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:31:05,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505951866] [2020-09-21 11:31:05,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:05,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:05,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:05,223 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-09-21 11:31:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:05,401 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-09-21 11:31:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:05,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-09-21 11:31:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:05,404 INFO L225 Difference]: With dead ends: 157 [2020-09-21 11:31:05,404 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:31:05,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:31:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:31:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:31:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:31:05,410 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-09-21 11:31:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:05,410 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:31:05,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:31:05,413 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:31:05,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:31:05,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:31:05,859 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-09-21 11:31:05,859 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-21 11:31:05,859 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-21 11:31:05,860 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-09-21 11:31:05,860 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-09-21 11:31:05,860 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (<= elem_exists_~size (+ |elem_exists_#in~size| elem_exists_~i~0)) [2020-09-21 11:31:05,860 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-09-21 11:31:05,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:05,860 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:31:05,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:05,861 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-09-21 11:31:05,861 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-09-21 11:31:05,861 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-09-21 11:31:05,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:05,861 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:31:05,861 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:31:05,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:05,861 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-09-21 11:31:05,862 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-09-21 11:31:05,862 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-09-21 11:31:05,862 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-09-21 11:31:05,863 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 11:31:05,863 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-09-21 11:31:05,863 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 11:31:05,863 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-09-21 11:31:05,863 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-09-21 11:31:05,865 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 11:31:05,866 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-09-21 11:31:05,867 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-09-21 11:31:05,867 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-09-21 11:31:05,867 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-09-21 11:31:05,867 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-09-21 11:31:05,867 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-09-21 11:31:05,867 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-09-21 11:31:05,867 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-09-21 11:31:05,868 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-09-21 11:31:05,868 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:31:05,868 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-21 11:31:05,868 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-09-21 11:31:05,868 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0)