/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:09:22,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:09:22,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:09:22,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:09:22,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:09:22,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:09:22,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:09:22,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:09:22,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:09:22,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:09:22,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:09:22,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:09:22,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:09:22,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:09:22,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:09:22,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:09:22,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:09:22,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:09:22,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:09:22,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:09:22,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:09:22,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:09:22,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:09:22,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:09:22,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:09:22,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:09:22,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:09:22,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:09:22,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:09:22,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:09:22,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:09:22,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:09:22,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:09:22,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:09:22,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:09:22,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:09:22,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:09:22,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:09:22,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:09:22,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:09:22,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:09:22,125 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 [2020-09-24 16:09:22,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:09:22,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:09:22,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:09:22,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:09:22,159 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:09:22,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:09:22,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:09:22,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:09:22,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:09:22,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:09:22,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:09:22,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:09:22,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:09:22,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:09:22,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:09:22,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:09:22,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:09:22,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:09:22,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:09:22,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:09:22,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:09:22,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:09:22,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:09:22,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:09:22,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:09:22,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:09:22,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:09:22,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:09:22,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:09:22,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement 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; [2020-09-24 16:09:22,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:09:22,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:09:22,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:09:22,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:09:22,707 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:09:22,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 16:09:22,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ab4825d8/556d0f3b6cf74b538e83f97d260c5b4c/FLAGee33c63c8 [2020-09-24 16:09:23,330 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:09:23,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 16:09:23,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ab4825d8/556d0f3b6cf74b538e83f97d260c5b4c/FLAGee33c63c8 [2020-09-24 16:09:23,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ab4825d8/556d0f3b6cf74b538e83f97d260c5b4c [2020-09-24 16:09:23,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:09:23,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:09:23,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:09:23,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:09:23,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:09:23,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:23" (1/1) ... [2020-09-24 16:09:23,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d98c58a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:23, skipping insertion in model container [2020-09-24 16:09:23,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:23" (1/1) ... [2020-09-24 16:09:23,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:09:23,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:09:24,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:09:24,023 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:09:24,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:09:24,066 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:09:24,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24 WrapperNode [2020-09-24 16:09:24,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:09:24,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:09:24,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:09:24,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:09:24,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (1/1) ... [2020-09-24 16:09:24,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:09:24,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:09:24,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:09:24,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:09:24,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (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 [2020-09-24 16:09:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:09:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:09:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:09:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 16:09:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:09:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 16:09:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:09:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:09:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 16:09:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 16:09:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 16:09:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:09:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:09:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 16:09:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:09:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:09:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:09:24,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:09:24,595 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 16:09:24,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:24 BoogieIcfgContainer [2020-09-24 16:09:24,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:09:24,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:09:24,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:09:24,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:09:24,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:09:23" (1/3) ... [2020-09-24 16:09:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1187bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:24, skipping insertion in model container [2020-09-24 16:09:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:24" (2/3) ... [2020-09-24 16:09:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1187bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:24, skipping insertion in model container [2020-09-24 16:09:24,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:24" (3/3) ... [2020-09-24 16:09:24,612 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 16:09:24,625 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:09:24,636 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:09:24,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:09:24,726 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:09:24,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:09:24,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:09:24,727 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:09:24,727 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:09:24,727 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:09:24,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:09:24,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:09:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 16:09:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 16:09:24,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:24,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:24,761 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 16:09:24,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:24,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935608545] [2020-09-24 16:09:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:24,939 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:24,940 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:24,940 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:24,940 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:24,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:09:24,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:24,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:09:24,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 16:09:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:24,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:25,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:25,023 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:25,024 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:25,024 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:25,024 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:25,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:25,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:25,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:25,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:25,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:25,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:25,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:25,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:25,070 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:25,070 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:25,071 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:25,071 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:25,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 16:09:25,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:25,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:25,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:25,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 16:09:25,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:25,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:25,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935608545] [2020-09-24 16:09:25,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:25,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:09:25,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772957186] [2020-09-24 16:09:25,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:09:25,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:09:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:09:25,115 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-24 16:09:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:25,332 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 16:09:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:09:25,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-24 16:09:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:25,349 INFO L225 Difference]: With dead ends: 94 [2020-09-24 16:09:25,349 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 16:09:25,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:09:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 16:09:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-24 16:09:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 16:09:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-24 16:09:25,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-24 16:09:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:25,409 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-24 16:09:25,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:09:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-24 16:09:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 16:09:25,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:25,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:25,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:09:25,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-24 16:09:25,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:25,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580523328] [2020-09-24 16:09:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:25,474 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:25,474 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:25,474 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:25,475 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:25,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:09:25,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:25,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 16:09:25,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:09:25,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:25,543 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:25,543 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:25,544 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:25,544 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:25,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:25,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:25,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:25,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:25,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:25,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:25,587 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:25,587 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:25,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:25,588 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:25,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 16:09:25,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:09:25,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:25,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:25,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:09:25,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:25,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580523328] [2020-09-24 16:09:25,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:25,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 16:09:25,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653358056] [2020-09-24 16:09:25,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:09:25,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:09:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:09:25,641 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-24 16:09:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:25,931 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-24 16:09:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:09:25,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-24 16:09:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:25,933 INFO L225 Difference]: With dead ends: 81 [2020-09-24 16:09:25,934 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 16:09:25,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:09:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 16:09:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-24 16:09:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 16:09:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 16:09:25,946 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 16:09:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:25,946 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 16:09:25,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:09:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 16:09:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 16:09:25,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:25,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:25,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:09:25,949 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-09-24 16:09:25,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:25,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704897859] [2020-09-24 16:09:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,019 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,019 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,022 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,022 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 16:09:26,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 16:09:26,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:09:26,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:26,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 16:09:26,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,089 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,089 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,089 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,090 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:26,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:26,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:26,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,132 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,132 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,133 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,133 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 16:09:26,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:09:26,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:09:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:09:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:26,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704897859] [2020-09-24 16:09:26,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:26,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:09:26,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199996593] [2020-09-24 16:09:26,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:09:26,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:09:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:09:26,215 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-24 16:09:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:26,502 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-24 16:09:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:09:26,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-24 16:09:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:26,504 INFO L225 Difference]: With dead ends: 87 [2020-09-24 16:09:26,504 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 16:09:26,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:09:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 16:09:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-24 16:09:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 16:09:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-24 16:09:26,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-24 16:09:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:26,515 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-24 16:09:26,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:09:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-24 16:09:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 16:09:26,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:26,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-09-24 16:09:26,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:09:26,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-09-24 16:09:26,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:26,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953286157] [2020-09-24 16:09:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,561 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,561 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,561 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,562 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 16:09:26,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:09:26,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:09:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 16:09:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:09:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 16:09:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,626 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,626 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,626 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,626 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:26,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:26,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 16:09:26,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953286157] [2020-09-24 16:09:26,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:26,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:09:26,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728515706] [2020-09-24 16:09:26,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:09:26,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:09:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:09:26,690 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-09-24 16:09:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:26,849 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-09-24 16:09:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:09:26,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 16:09:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:26,853 INFO L225 Difference]: With dead ends: 86 [2020-09-24 16:09:26,853 INFO L226 Difference]: Without dead ends: 71 [2020-09-24 16:09:26,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:09:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-24 16:09:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-09-24 16:09:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:09:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-09-24 16:09:26,886 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-09-24 16:09:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:26,887 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-09-24 16:09:26,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:09:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-09-24 16:09:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:09:26,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:26,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2020-09-24 16:09:26,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:09:26,892 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash 272366111, now seen corresponding path program 1 times [2020-09-24 16:09:26,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:26,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422314752] [2020-09-24 16:09:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,952 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,971 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,971 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,971 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 16:09:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 16:09:26,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:26,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:09:27,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,048 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,049 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,050 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,050 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:27,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:27,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:27,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:27,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:27,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,085 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,085 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,085 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:27,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:27,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 16:09:27,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422314752] [2020-09-24 16:09:27,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:27,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:09:27,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256160516] [2020-09-24 16:09:27,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:09:27,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:27,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:09:27,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:09:27,100 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-09-24 16:09:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:27,292 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-09-24 16:09:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:09:27,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-09-24 16:09:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:27,295 INFO L225 Difference]: With dead ends: 95 [2020-09-24 16:09:27,295 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 16:09:27,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:09:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 16:09:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-24 16:09:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 16:09:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-24 16:09:27,304 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-09-24 16:09:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:27,305 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-24 16:09:27,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:09:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-24 16:09:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 16:09:27,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:27,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:27,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:09:27,308 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-09-24 16:09:27,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:27,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152683348] [2020-09-24 16:09:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,376 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,376 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,376 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 16:09:27,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:09:27,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:09:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 16:09:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,414 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,414 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,415 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:27,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:27,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:27,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,450 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,451 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,451 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,451 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:27,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 16:09:27,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:09:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:09:27,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:27,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152683348] [2020-09-24 16:09:27,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:27,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:09:27,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475720759] [2020-09-24 16:09:27,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:09:27,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:27,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:09:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:09:27,703 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-09-24 16:09:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:28,100 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-09-24 16:09:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:09:28,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-24 16:09:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:28,102 INFO L225 Difference]: With dead ends: 113 [2020-09-24 16:09:28,102 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 16:09:28,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:09:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 16:09:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-24 16:09:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 16:09:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-24 16:09:28,113 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-09-24 16:09:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:28,114 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-24 16:09:28,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:09:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-24 16:09:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 16:09:28,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:28,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:28,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:09:28,117 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 809903117, now seen corresponding path program 3 times [2020-09-24 16:09:28,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:28,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054073664] [2020-09-24 16:09:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,158 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,158 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,158 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,158 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 16:09:28,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:09:28,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:09:28,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:28,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 16:09:28,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,194 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,194 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,194 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,195 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:28,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,240 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,240 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,241 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,241 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 16:09:28,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:09:28,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:09:28,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:28,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 16:09:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:28,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054073664] [2020-09-24 16:09:28,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:28,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:09:28,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787646765] [2020-09-24 16:09:28,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:09:28,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:09:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:09:28,385 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-09-24 16:09:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:28,823 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-09-24 16:09:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:09:28,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-24 16:09:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:28,825 INFO L225 Difference]: With dead ends: 119 [2020-09-24 16:09:28,825 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 16:09:28,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:09:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 16:09:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-24 16:09:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 16:09:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-24 16:09:28,834 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-09-24 16:09:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:28,835 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-24 16:09:28,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:09:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-24 16:09:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 16:09:28,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:28,837 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:28,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:09:28,837 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 577206281, now seen corresponding path program 4 times [2020-09-24 16:09:28,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:28,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95607683] [2020-09-24 16:09:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,885 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,886 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,886 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,886 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 16:09:28,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:09:28,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:09:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 16:09:28,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,925 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,925 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,925 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:28,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,976 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,976 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 16:09:28,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 16:09:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:09:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 16:09:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:29,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95607683] [2020-09-24 16:09:29,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:29,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:09:29,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741326039] [2020-09-24 16:09:29,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:09:29,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:09:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:09:29,169 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-24 16:09:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:29,754 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-09-24 16:09:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:09:29,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 16:09:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:29,756 INFO L225 Difference]: With dead ends: 125 [2020-09-24 16:09:29,756 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 16:09:29,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 16:09:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-24 16:09:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 16:09:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-09-24 16:09:29,768 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-09-24 16:09:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:29,768 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-09-24 16:09:29,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:09:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-09-24 16:09:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 16:09:29,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:29,770 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:29,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:09:29,770 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash -274669819, now seen corresponding path program 5 times [2020-09-24 16:09:29,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:29,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299173324] [2020-09-24 16:09:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,822 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,822 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,823 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,823 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 16:09:29,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 16:09:29,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:09:29,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 16:09:29,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,879 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,879 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,880 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,880 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:29,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 16:09:29,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:09:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 16:09:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:30,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299173324] [2020-09-24 16:09:30,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:30,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:09:30,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843309640] [2020-09-24 16:09:30,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:09:30,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:30,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:09:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:09:30,536 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-09-24 16:09:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:31,222 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-09-24 16:09:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:09:31,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-24 16:09:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:31,223 INFO L225 Difference]: With dead ends: 131 [2020-09-24 16:09:31,224 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 16:09:31,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 16:09:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-24 16:09:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 16:09:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-09-24 16:09:31,238 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-09-24 16:09:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:31,238 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-09-24 16:09:31,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:09:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-09-24 16:09:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 16:09:31,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:31,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:31,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:09:31,243 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash -61335295, now seen corresponding path program 6 times [2020-09-24 16:09:31,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:31,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23051260] [2020-09-24 16:09:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,322 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 16:09:31,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:09:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 16:09:31,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:31,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,382 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,382 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,382 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,382 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:31,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:31,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:31,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,460 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,461 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,461 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,461 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 16:09:31,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 16:09:31,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:09:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:31,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 16:09:31,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:31,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23051260] [2020-09-24 16:09:31,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:31,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:09:31,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506056162] [2020-09-24 16:09:31,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:09:31,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:31,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:09:31,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:09:31,734 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-09-24 16:09:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:32,511 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-09-24 16:09:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:09:32,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-24 16:09:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:32,515 INFO L225 Difference]: With dead ends: 137 [2020-09-24 16:09:32,516 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 16:09:32,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 16:09:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 16:09:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-24 16:09:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 16:09:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-09-24 16:09:32,537 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-09-24 16:09:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:32,540 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-09-24 16:09:32,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:09:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-09-24 16:09:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 16:09:32,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:32,542 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:32,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:09:32,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:32,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1180506627, now seen corresponding path program 7 times [2020-09-24 16:09:32,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:32,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282938511] [2020-09-24 16:09:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,663 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,663 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,663 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,664 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 16:09:32,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 16:09:32,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:09:32,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:32,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 16:09:32,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,708 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,708 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,708 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,708 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:32,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:32,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:32,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:32,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,784 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,784 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 16:09:32,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:09:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:33,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282938511] [2020-09-24 16:09:33,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:33,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:09:33,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51101598] [2020-09-24 16:09:33,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:09:33,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:09:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:09:33,097 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-09-24 16:09:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:34,133 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-24 16:09:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 16:09:34,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-09-24 16:09:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:34,135 INFO L225 Difference]: With dead ends: 143 [2020-09-24 16:09:34,135 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 16:09:34,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:09:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 16:09:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-24 16:09:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 16:09:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-09-24 16:09:34,146 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-09-24 16:09:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:34,146 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-09-24 16:09:34,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:09:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-09-24 16:09:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 16:09:34,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:34,149 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:34,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:09:34,149 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1632044537, now seen corresponding path program 8 times [2020-09-24 16:09:34,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:34,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253553509] [2020-09-24 16:09:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,256 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,257 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,257 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,257 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 16:09:34,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 16:09:34,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:09:34,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:34,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 16:09:34,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:34,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,303 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,303 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,304 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,305 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:34,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:34,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:34,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:34,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,402 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,403 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,403 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,403 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 16:09:34,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 16:09:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:09:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 16:09:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:35,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253553509] [2020-09-24 16:09:35,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:35,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:09:35,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109754383] [2020-09-24 16:09:35,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:09:35,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:09:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:09:35,378 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-09-24 16:09:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:36,404 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-09-24 16:09:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 16:09:36,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-09-24 16:09:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:36,405 INFO L225 Difference]: With dead ends: 149 [2020-09-24 16:09:36,406 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 16:09:36,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:09:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 16:09:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-09-24 16:09:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-24 16:09:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-09-24 16:09:36,415 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-09-24 16:09:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:36,415 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-09-24 16:09:36,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:09:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-09-24 16:09:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 16:09:36,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:36,417 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:36,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:09:36,417 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1313195787, now seen corresponding path program 9 times [2020-09-24 16:09:36,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:36,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248253184] [2020-09-24 16:09:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:36,523 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:36,523 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:36,524 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:36,524 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:36,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 16:09:36,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:36,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 16:09:36,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:36,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:09:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:36,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 16:09:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:36,570 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:36,570 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:36,571 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:36,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:36,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:36,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:36,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:36,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:36,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:36,688 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:36,689 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:36,689 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:36,689 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:36,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 16:09:36,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 16:09:36,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:09:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 16:09:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:37,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248253184] [2020-09-24 16:09:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:37,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:09:37,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568449047] [2020-09-24 16:09:37,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:09:37,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:09:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:09:37,703 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-09-24 16:09:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:38,913 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-09-24 16:09:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 16:09:38,914 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-09-24 16:09:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:38,915 INFO L225 Difference]: With dead ends: 155 [2020-09-24 16:09:38,916 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 16:09:38,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:09:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 16:09:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-09-24 16:09:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 16:09:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 16:09:38,923 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-09-24 16:09:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:38,923 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 16:09:38,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:09:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 16:09:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 16:09:38,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:38,925 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:38,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:09:38,925 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1440596239, now seen corresponding path program 10 times [2020-09-24 16:09:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:38,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925369365] [2020-09-24 16:09:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:39,033 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:39,033 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:39,033 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:09:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 16:09:39,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:39,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:39,082 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:39,082 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:39,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:39,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:39,189 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:39,189 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:39,190 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:39,190 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:39,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:09:39,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 16:09:39,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:09:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 16:09:39,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:39,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925369365] [2020-09-24 16:09:39,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:39,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:09:39,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432086068] [2020-09-24 16:09:39,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:09:39,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:09:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:09:39,667 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-09-24 16:09:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:41,137 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-24 16:09:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 16:09:41,138 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-09-24 16:09:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:41,139 INFO L225 Difference]: With dead ends: 161 [2020-09-24 16:09:41,139 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 16:09:41,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 16:09:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 16:09:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-24 16:09:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 16:09:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-09-24 16:09:41,148 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-09-24 16:09:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:41,148 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-09-24 16:09:41,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:09:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-09-24 16:09:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 16:09:41,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:41,150 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:41,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:09:41,150 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1179965421, now seen corresponding path program 11 times [2020-09-24 16:09:41,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:41,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566510125] [2020-09-24 16:09:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:41,271 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:41,271 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:41,271 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:41,271 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 16:09:41,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 16:09:41,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:09:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 16:09:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:41,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:41,317 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:41,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:41,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:41,437 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:41,437 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:41,437 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:41,438 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:41,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 16:09:41,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:41,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 16:09:41,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:09:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 16:09:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:41,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566510125] [2020-09-24 16:09:41,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:41,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 16:09:41,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408524515] [2020-09-24 16:09:41,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 16:09:41,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:41,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 16:09:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:09:41,949 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-09-24 16:09:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:43,489 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-09-24 16:09:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 16:09:43,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-09-24 16:09:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:43,491 INFO L225 Difference]: With dead ends: 167 [2020-09-24 16:09:43,491 INFO L226 Difference]: Without dead ends: 130 [2020-09-24 16:09:43,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 16:09:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-24 16:09:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-24 16:09:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 16:09:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-09-24 16:09:43,499 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-09-24 16:09:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:43,499 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-09-24 16:09:43,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 16:09:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-09-24 16:09:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 16:09:43,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:43,501 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:43,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:09:43,501 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 987218921, now seen corresponding path program 12 times [2020-09-24 16:09:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:43,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890053873] [2020-09-24 16:09:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:43,624 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:43,624 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:43,624 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:43,624 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:43,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:43,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 16:09:43,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:43,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:43,681 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:43,681 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:43,681 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:43,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:43,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:43,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:43,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:43,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:43,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:43,841 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:43,842 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:43,842 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:43,842 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:43,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:09:43,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:43,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 16:09:43,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:09:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:43,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 16:09:43,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:44,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890053873] [2020-09-24 16:09:44,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:44,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 16:09:44,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809633373] [2020-09-24 16:09:44,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 16:09:44,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 16:09:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:44,640 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-09-24 16:09:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:46,607 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-09-24 16:09:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 16:09:46,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-09-24 16:09:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:46,608 INFO L225 Difference]: With dead ends: 173 [2020-09-24 16:09:46,609 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 16:09:46,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1284, Invalid=3686, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:09:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 16:09:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-24 16:09:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 16:09:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-24 16:09:46,617 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-09-24 16:09:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:46,618 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-24 16:09:46,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 16:09:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-24 16:09:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 16:09:46,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:46,619 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:46,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:09:46,619 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1327447323, now seen corresponding path program 13 times [2020-09-24 16:09:46,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:46,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624572555] [2020-09-24 16:09:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:46,766 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:46,766 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:46,766 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:46,766 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:09:46,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-24 16:09:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:46,817 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:46,817 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:46,817 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:46,817 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:46,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:46,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:46,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:46,969 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:46,969 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:46,969 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:46,969 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:46,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 16:09:46,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:46,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-24 16:09:46,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:46,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 16:09:46,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:47,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624572555] [2020-09-24 16:09:47,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:47,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 16:09:47,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777550539] [2020-09-24 16:09:47,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 16:09:47,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 16:09:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:09:47,689 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-09-24 16:09:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:49,851 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-09-24 16:09:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 16:09:49,852 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-09-24 16:09:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:49,853 INFO L225 Difference]: With dead ends: 179 [2020-09-24 16:09:49,853 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 16:09:49,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1479, Invalid=4221, Unknown=0, NotChecked=0, Total=5700 [2020-09-24 16:09:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 16:09:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-24 16:09:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 16:09:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-24 16:09:49,861 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-09-24 16:09:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:49,862 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-24 16:09:49,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 16:09:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-24 16:09:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-24 16:09:49,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:49,863 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:49,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:09:49,864 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:49,864 INFO L82 PathProgramCache]: Analyzing trace with hash 39163105, now seen corresponding path program 14 times [2020-09-24 16:09:49,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:49,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014993101] [2020-09-24 16:09:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,032 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,033 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,033 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,033 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 16:09:50,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 16:09:50,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:09:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 16:09:50,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,121 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,121 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,122 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,122 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:50,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:50,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:50,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,293 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,293 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,293 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-24 16:09:50,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 16:09:50,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:09:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 16:09:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:51,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014993101] [2020-09-24 16:09:51,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:51,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 16:09:51,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513146724] [2020-09-24 16:09:51,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 16:09:51,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 16:09:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:09:51,357 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-09-24 16:09:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:53,965 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-09-24 16:09:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 16:09:53,972 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-09-24 16:09:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:53,973 INFO L225 Difference]: With dead ends: 185 [2020-09-24 16:09:53,974 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 16:09:53,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2020-09-24 16:09:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 16:09:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-24 16:09:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 16:09:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-24 16:09:53,981 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-09-24 16:09:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:53,982 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-24 16:09:53,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 16:09:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-24 16:09:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 16:09:53,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:53,983 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:53,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:09:53,984 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1976302045, now seen corresponding path program 15 times [2020-09-24 16:09:53,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:53,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904195771] [2020-09-24 16:09:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,166 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,166 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,166 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:09:54,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:54,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 16:09:54,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:54,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,230 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,230 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,231 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,231 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:54,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:54,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:54,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:54,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,463 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,463 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,464 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 16:09:54,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-24 16:09:54,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:09:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-24 16:09:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:56,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904195771] [2020-09-24 16:09:56,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:56,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 16:09:56,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197341154] [2020-09-24 16:09:56,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 16:09:56,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 16:09:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:09:56,715 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-09-24 16:09:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:59,312 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-24 16:09:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 16:09:59,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-09-24 16:09:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:59,315 INFO L225 Difference]: With dead ends: 191 [2020-09-24 16:09:59,316 INFO L226 Difference]: Without dead ends: 154 [2020-09-24 16:09:59,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:09:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-24 16:09:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-24 16:09:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-24 16:09:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-09-24 16:09:59,324 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-09-24 16:09:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:59,324 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-09-24 16:09:59,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 16:09:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-09-24 16:09:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 16:09:59,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:59,325 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 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] [2020-09-24 16:09:59,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:09:59,326 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash -91639335, now seen corresponding path program 16 times [2020-09-24 16:09:59,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:59,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685692822] [2020-09-24 16:09:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,518 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,519 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,519 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,519 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 16:09:59,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-24 16:09:59,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:09:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-24 16:09:59,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,589 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,589 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,589 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:59,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:59,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:59,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:59,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:59,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:59,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,822 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,822 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,823 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,823 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-24 16:09:59,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-24 16:09:59,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:09:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:59,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 16:09:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:00,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685692822] [2020-09-24 16:10:00,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 16:10:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616021695] [2020-09-24 16:10:00,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 16:10:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 16:10:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:10:00,848 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-09-24 16:10:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:03,719 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-09-24 16:10:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 16:10:03,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-09-24 16:10:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:03,723 INFO L225 Difference]: With dead ends: 197 [2020-09-24 16:10:03,723 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 16:10:03,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2168, Invalid=6204, Unknown=0, NotChecked=0, Total=8372 [2020-09-24 16:10:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 16:10:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-24 16:10:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-24 16:10:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-09-24 16:10:03,736 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-09-24 16:10:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:03,737 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-09-24 16:10:03,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 16:10:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-09-24 16:10:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 16:10:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:03,738 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 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] [2020-09-24 16:10:03,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:10:03,739 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash -461079339, now seen corresponding path program 17 times [2020-09-24 16:10:03,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:03,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585000609] [2020-09-24 16:10:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:03,963 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:03,963 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:03,963 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:03,963 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:03,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:03,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-24 16:10:03,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:04,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:04,030 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:04,031 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:04,031 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:04,031 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:04,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:04,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:04,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:04,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:04,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:04,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:04,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:04,291 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:04,291 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:04,292 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:04,292 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:04,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-24 16:10:04,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:04,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-24 16:10:04,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 16:10:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:06,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585000609] [2020-09-24 16:10:06,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:06,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 16:10:06,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774295742] [2020-09-24 16:10:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 16:10:06,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 16:10:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 16:10:06,812 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-09-24 16:10:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:09,577 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-24 16:10:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 16:10:09,577 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-09-24 16:10:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:09,579 INFO L225 Difference]: With dead ends: 203 [2020-09-24 16:10:09,579 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 16:10:09,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-09-24 16:10:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 16:10:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-09-24 16:10:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-24 16:10:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-09-24 16:10:09,587 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-09-24 16:10:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:09,587 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-09-24 16:10:09,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 16:10:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-09-24 16:10:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 16:10:09,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:09,589 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 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] [2020-09-24 16:10:09,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:10:09,589 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1469965615, now seen corresponding path program 18 times [2020-09-24 16:10:09,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:09,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738687812] [2020-09-24 16:10:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:09,821 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:09,821 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:09,821 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:09,821 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:09,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:09,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-09-24 16:10:09,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:09,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:09,883 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:09,883 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:09,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:09,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:10,125 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:10,125 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:10,125 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:10,126 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:10,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 16:10:10,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:10,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-09-24 16:10:10,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:10,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:10:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-09-24 16:10:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:11,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738687812] [2020-09-24 16:10:11,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:11,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 16:10:11,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399347871] [2020-09-24 16:10:11,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 16:10:11,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 16:10:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:10:11,410 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-09-24 16:10:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:14,855 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-09-24 16:10:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 16:10:14,858 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-09-24 16:10:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:14,859 INFO L225 Difference]: With dead ends: 209 [2020-09-24 16:10:14,859 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 16:10:14,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2686, Invalid=7616, Unknown=0, NotChecked=0, Total=10302 [2020-09-24 16:10:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 16:10:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-09-24 16:10:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-24 16:10:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-09-24 16:10:14,867 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-09-24 16:10:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:14,868 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-09-24 16:10:14,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 16:10:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-09-24 16:10:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-24 16:10:14,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:14,869 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 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] [2020-09-24 16:10:14,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:10:14,870 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1753723955, now seen corresponding path program 19 times [2020-09-24 16:10:14,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:14,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809944246] [2020-09-24 16:10:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:15,145 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:15,145 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:15,146 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:15,146 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:15,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 16:10:15,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:15,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-24 16:10:15,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:10:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:15,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-24 16:10:15,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:15,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:15,242 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:15,242 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:15,243 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:15,243 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:15,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:15,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:15,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:15,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:15,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:15,553 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:15,553 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:15,553 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:15,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:15,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-09-24 16:10:15,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:15,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-24 16:10:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:10:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 16:10:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:17,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809944246] [2020-09-24 16:10:17,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:17,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 16:10:17,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182519439] [2020-09-24 16:10:17,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 16:10:17,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 16:10:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 16:10:17,029 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states.