/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:26:07,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:26:07,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:26:07,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:26:07,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:26:07,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:26:07,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:26:07,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:26:07,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:26:07,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:26:07,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:26:07,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:26:07,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:26:07,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:26:07,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:26:07,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:26:07,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:26:07,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:26:07,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:26:07,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:26:07,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:26:07,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:26:07,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:26:07,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:26:07,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:26:07,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:26:07,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:26:07,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:26:07,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:26:07,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:26:07,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:26:07,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:26:07,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:26:07,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:26:07,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:26:07,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:26:07,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:26:07,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:26:07,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:26:07,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:26:07,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:26:07,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:26:07,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:26:07,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:26:07,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:26:07,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:26:07,254 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:26:07,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:26:07,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:26:07,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:26:07,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:26:07,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:26:07,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:26:07,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:26:07,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:26:07,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:26:07,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:26:07,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:26:07,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:26:07,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:26:07,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:26:07,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:26:07,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:26:07,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:07,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:26:07,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:26:07,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:26:07,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:26:07,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:26:07,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:26:07,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:26:07,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:26:07,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:26:07,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:26:07,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:26:07,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:26:07,597 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:26:07,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c [2020-10-13 04:26:07,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a6a43412/2ee0fa9fbe84492fa8f17237b69413c7/FLAGba147c8ae [2020-10-13 04:26:08,084 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:26:08,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c [2020-10-13 04:26:08,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a6a43412/2ee0fa9fbe84492fa8f17237b69413c7/FLAGba147c8ae [2020-10-13 04:26:08,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a6a43412/2ee0fa9fbe84492fa8f17237b69413c7 [2020-10-13 04:26:08,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:26:08,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:26:08,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:26:08,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:26:08,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:26:08,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:26:08,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,726 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:26:08,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,765 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:26:08,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08 WrapperNode [2020-10-13 04:26:08,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:26:08,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:26:08,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:26:08,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:26:08,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:26:08,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:26:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:26:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:26:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:26:08,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:26:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:26:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:26:08,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:26:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:26:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:26:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:26:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:26:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:26:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:26:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:26:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:26:09,193 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:26:09,193 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 04:26:09,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:09 BoogieIcfgContainer [2020-10-13 04:26:09,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:26:09,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:26:09,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:26:09,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:26:09,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:26:08" (1/3) ... [2020-10-13 04:26:09,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ecf950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:09, skipping insertion in model container [2020-10-13 04:26:09,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (2/3) ... [2020-10-13 04:26:09,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ecf950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:09, skipping insertion in model container [2020-10-13 04:26:09,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:09" (3/3) ... [2020-10-13 04:26:09,209 INFO L109 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2020-10-13 04:26:09,221 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:26:09,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:26:09,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:26:09,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:26:09,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:26:09,290 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:26:09,290 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:26:09,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:26:09,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:26:09,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:26:09,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:26:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 04:26:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:26:09,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 48820346, now seen corresponding path program 1 times [2020-10-13 04:26:09,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112322686] [2020-10-13 04:26:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:26:09,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 04:26:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:09,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:26:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:09,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:26:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:09,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112322686] [2020-10-13 04:26:09,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:26:09,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:26:09,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065972244] [2020-10-13 04:26:09,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:26:09,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:26:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:26:09,742 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-13 04:26:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:09,856 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-13 04:26:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:26:09,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 04:26:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:09,867 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:26:09,867 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 04:26:09,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:26:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 04:26:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-13 04:26:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 04:26:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 04:26:09,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-10-13 04:26:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:09,911 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 04:26:09,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:26:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 04:26:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:26:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:26:09,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash -298336104, now seen corresponding path program 1 times [2020-10-13 04:26:09,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994109843] [2020-10-13 04:26:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:26:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-13 04:26:10,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:26:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:26:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:26:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994109843] [2020-10-13 04:26:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:26:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982964023] [2020-10-13 04:26:10,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:26:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:26:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:10,482 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-13 04:26:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,564 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 04:26:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:26:10,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 04:26:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,566 INFO L225 Difference]: With dead ends: 34 [2020-10-13 04:26:10,566 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:26:10,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:26:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 04:26:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:26:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 04:26:10,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-13 04:26:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,576 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 04:26:10,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:26:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 04:26:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:26:10,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:26:10,594 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1091764534, now seen corresponding path program 2 times [2020-10-13 04:26:10,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731456311] [2020-10-13 04:26:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:10,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731456311] [2020-10-13 04:26:10,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:10,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570346827] [2020-10-13 04:26:10,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:26:10,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:26:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,933 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-13 04:26:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:11,018 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 04:26:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:26:11,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 04:26:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:11,020 INFO L225 Difference]: With dead ends: 36 [2020-10-13 04:26:11,020 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:26:11,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:26:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:26:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:26:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 04:26:11,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-10-13 04:26:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 04:26:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:26:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 04:26:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:26:11,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:11,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:11,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:26:11,030 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1243648596, now seen corresponding path program 3 times [2020-10-13 04:26:11,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:11,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053193179] [2020-10-13 04:26:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:26:11,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:11,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-13 04:26:11,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:11,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:26:11,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:11,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:11,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:11,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053193179] [2020-10-13 04:26:11,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:11,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:26:11,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233799000] [2020-10-13 04:26:11,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:26:11,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:11,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:26:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:11,572 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-13 04:26:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:11,647 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 04:26:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:26:11,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 04:26:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:11,649 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:26:11,649 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:26:11,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:26:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 04:26:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:26:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 04:26:11,656 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-10-13 04:26:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:11,656 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 04:26:11,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:26:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 04:26:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:26:11,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:11,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:11,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:26:11,658 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1175344114, now seen corresponding path program 4 times [2020-10-13 04:26:11,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:11,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768990749] [2020-10-13 04:26:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:26:12,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-13 04:26:12,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:26:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:12,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768990749] [2020-10-13 04:26:12,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:12,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830521219] [2020-10-13 04:26:12,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:12,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:12,116 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-13 04:26:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:12,207 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 04:26:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:12,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-13 04:26:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:12,209 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:26:12,209 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:26:12,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:26:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 04:26:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:26:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 04:26:12,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-10-13 04:26:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:12,216 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 04:26:12,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 04:26:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:26:12,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:12,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:12,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:26:12,218 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash -40753648, now seen corresponding path program 5 times [2020-10-13 04:26:12,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:12,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876182705] [2020-10-13 04:26:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:26:12,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:12,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-13 04:26:12,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:26:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:26:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:12,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:12,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876182705] [2020-10-13 04:26:12,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:26:12,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836860973] [2020-10-13 04:26:12,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:26:12,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:26:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:12,809 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-10-13 04:26:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:12,937 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 04:26:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:26:12,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-13 04:26:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:12,939 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:26:12,939 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:26:12,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:26:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 04:26:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:26:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 04:26:12,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-13 04:26:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:12,946 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 04:26:12,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:26:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 04:26:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:26:12,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:12,947 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:12,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:26:12,948 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -479598418, now seen corresponding path program 6 times [2020-10-13 04:26:12,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:12,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499785474] [2020-10-13 04:26:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:13,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:26:13,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-13 04:26:13,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:26:13,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:14,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:14,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:14,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:14,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499785474] [2020-10-13 04:26:14,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:14,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:14,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984929005] [2020-10-13 04:26:14,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:14,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:14,146 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-10-13 04:26:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:14,321 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 04:26:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:14,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 04:26:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:14,323 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:26:14,323 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:26:14,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:26:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:26:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:26:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 04:26:14,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-10-13 04:26:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:14,339 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 04:26:14,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 04:26:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:26:14,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:14,341 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:14,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:26:14,342 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1302627380, now seen corresponding path program 7 times [2020-10-13 04:26:14,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:14,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803723683] [2020-10-13 04:26:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:26:16,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2135 [2020-10-13 04:26:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:26:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:16,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:16,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:16,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:16,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:16,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:16,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:16,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803723683] [2020-10-13 04:26:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:16,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:16,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358444041] [2020-10-13 04:26:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:16,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:16,607 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2020-10-13 04:26:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:16,701 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 04:26:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:26:16,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 04:26:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:16,702 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:26:16,702 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:26:16,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:26:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 04:26:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:26:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 04:26:16,708 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-10-13 04:26:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:16,708 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 04:26:16,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 04:26:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:26:16,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:16,710 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:16,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:26:16,710 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1959477398, now seen corresponding path program 8 times [2020-10-13 04:26:16,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289815478] [2020-10-13 04:26:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:26:17,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:17,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-13 04:26:17,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:26:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:18,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:18,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:18,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:18,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:18,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:18,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289815478] [2020-10-13 04:26:18,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:18,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:18,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993948274] [2020-10-13 04:26:18,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:18,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:18,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:18,117 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 12 states. [2020-10-13 04:26:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:18,248 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 04:26:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:18,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 04:26:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:18,250 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:26:18,250 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:26:18,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:26:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 04:26:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:26:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 04:26:18,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-10-13 04:26:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:18,263 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 04:26:18,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 04:26:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:18,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:18,268 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:18,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:26:18,269 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:18,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1832152184, now seen corresponding path program 9 times [2020-10-13 04:26:18,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:18,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391602142] [2020-10-13 04:26:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:26:19,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:19,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-13 04:26:19,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:26:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:19,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:26:19,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:19,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:19,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:19,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:19,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:19,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:19,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391602142] [2020-10-13 04:26:19,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:19,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:26:19,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807263353] [2020-10-13 04:26:19,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:26:19,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:26:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:19,970 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-10-13 04:26:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:20,171 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 04:26:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:26:20,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 04:26:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:20,173 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:26:20,174 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:26:20,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:26:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 04:26:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:26:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 04:26:20,179 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-10-13 04:26:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:20,180 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 04:26:20,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:26:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 04:26:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:26:20,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:20,181 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:20,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:26:20,181 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash 268294182, now seen corresponding path program 10 times [2020-10-13 04:26:20,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:20,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505954235] [2020-10-13 04:26:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:22,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:26:22,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:22,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2488 [2020-10-13 04:26:22,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:26:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:22,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:26:22,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:22,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:22,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:22,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:22,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:22,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:22,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:22,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:22,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:22,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505954235] [2020-10-13 04:26:22,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:22,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:26:22,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057404642] [2020-10-13 04:26:22,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:26:22,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:26:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:26:22,935 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-13 04:26:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:23,153 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 04:26:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:26:23,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-13 04:26:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:23,155 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:26:23,155 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:23,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:26:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:26:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:26:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 04:26:23,163 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2020-10-13 04:26:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:23,163 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 04:26:23,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:26:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 04:26:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:26:23,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:23,164 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:23,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:26:23,165 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 162622788, now seen corresponding path program 11 times [2020-10-13 04:26:23,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:23,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305259355] [2020-10-13 04:26:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:23,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:25,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:25,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:26:25,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:25,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2130 [2020-10-13 04:26:25,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:25,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:26:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:25,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:26:25,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:25,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:25,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:25,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:25,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:25,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:25,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:25,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:25,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305259355] [2020-10-13 04:26:25,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:25,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:26:25,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276752735] [2020-10-13 04:26:25,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:26:25,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:26:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:25,499 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2020-10-13 04:26:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:25,625 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 04:26:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:26:25,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-13 04:26:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:25,626 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:26:25,627 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:26:25,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:26:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:26:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:26:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 04:26:25,637 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2020-10-13 04:26:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:25,638 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 04:26:25,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:26:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 04:26:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:26:25,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:25,639 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:25,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:26:25,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1691628258, now seen corresponding path program 12 times [2020-10-13 04:26:25,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:25,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505977853] [2020-10-13 04:26:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:28,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:26:28,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:28,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-10-13 04:26:28,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:26:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:28,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:26:28,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:29,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:29,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:29,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:29,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:29,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:29,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505977853] [2020-10-13 04:26:29,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:29,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:26:29,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854463812] [2020-10-13 04:26:29,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:26:29,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:26:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:29,056 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-10-13 04:26:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:29,167 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 04:26:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:26:29,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 04:26:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:29,168 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:26:29,169 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:26:29,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:26:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:26:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:26:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-13 04:26:29,176 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-10-13 04:26:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:29,176 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-13 04:26:29,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:26:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-13 04:26:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:26:29,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:29,177 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:29,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:26:29,178 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2107897600, now seen corresponding path program 13 times [2020-10-13 04:26:29,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:29,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971190888] [2020-10-13 04:26:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:26:32,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:32,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2941 [2020-10-13 04:26:32,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:26:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:26:32,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:32,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:32,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:32,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:32,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971190888] [2020-10-13 04:26:32,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:32,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:32,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009535698] [2020-10-13 04:26:32,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:32,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:32,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:32,400 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2020-10-13 04:26:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:32,557 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 04:26:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:26:32,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-13 04:26:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:32,559 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:26:32,559 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:26:32,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:26:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 04:26:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:26:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 04:26:32,566 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2020-10-13 04:26:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:32,566 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 04:26:32,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 04:26:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:26:32,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:32,567 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:32,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:26:32,568 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1564921758, now seen corresponding path program 14 times [2020-10-13 04:26:32,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:32,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314968783] [2020-10-13 04:26:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:35,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:26:35,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:35,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3210 [2020-10-13 04:26:35,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:35,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:26:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:26:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:36,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:36,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:36,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:36,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314968783] [2020-10-13 04:26:36,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:36,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:26:36,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236881330] [2020-10-13 04:26:36,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:26:36,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:26:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:36,119 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states. [2020-10-13 04:26:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:36,329 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 04:26:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:26:36,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-13 04:26:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:36,330 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:26:36,331 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:26:36,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:26:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:26:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:26:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 04:26:36,344 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2020-10-13 04:26:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:36,345 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 04:26:36,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:26:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 04:26:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:26:36,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:36,348 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:36,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:26:36,349 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 681207484, now seen corresponding path program 15 times [2020-10-13 04:26:36,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:36,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223883903] [2020-10-13 04:26:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:39,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:26:39,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:39,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3579 [2020-10-13 04:26:39,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:39,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:26:39,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:40,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:40,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:40,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:40,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:40,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:40,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:40,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223883903] [2020-10-13 04:26:40,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:40,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:26:40,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502428920] [2020-10-13 04:26:40,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:26:40,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:26:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:40,236 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-10-13 04:26:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:40,399 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 04:26:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:26:40,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-13 04:26:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:40,400 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:26:40,400 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:26:40,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:26:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 04:26:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:26:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 04:26:40,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-10-13 04:26:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:40,409 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 04:26:40,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:26:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 04:26:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:26:40,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:40,410 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:40,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:26:40,411 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1835314778, now seen corresponding path program 16 times [2020-10-13 04:26:40,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:40,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811550321] [2020-10-13 04:26:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:26:43,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:43,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-10-13 04:26:43,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:26:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:26:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:43,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:43,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:43,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:43,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:43,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811550321] [2020-10-13 04:26:43,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:43,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:43,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967079580] [2020-10-13 04:26:43,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:43,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:43,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:43,985 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2020-10-13 04:26:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:44,082 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 04:26:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:26:44,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 04:26:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:44,083 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:26:44,083 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:26:44,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:26:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:26:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:26:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 04:26:44,089 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2020-10-13 04:26:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:44,089 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 04:26:44,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 04:26:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:26:44,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:44,090 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:44,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:26:44,091 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1464105352, now seen corresponding path program 17 times [2020-10-13 04:26:44,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:44,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020061246] [2020-10-13 04:26:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:44,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:26:47,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:47,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3155 [2020-10-13 04:26:47,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:47,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:47,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:26:47,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:47,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:47,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:47,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020061246] [2020-10-13 04:26:47,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:47,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:26:47,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928939903] [2020-10-13 04:26:47,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:26:47,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:26:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:47,534 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 21 states. [2020-10-13 04:26:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:47,661 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 04:26:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:26:47,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-13 04:26:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:47,663 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:26:47,663 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:26:47,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:26:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 04:26:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:26:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 04:26:47,668 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2020-10-13 04:26:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:47,669 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 04:26:47,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:26:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 04:26:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:26:47,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:47,670 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:47,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:26:47,670 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1773981462, now seen corresponding path program 18 times [2020-10-13 04:26:47,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:47,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975171446] [2020-10-13 04:26:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:50,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:50,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:26:50,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:50,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2986 [2020-10-13 04:26:50,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:50,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:26:50,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:50,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:26:50,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:50,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:50,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:50,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:50,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:50,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:50,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975171446] [2020-10-13 04:26:50,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:50,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:26:50,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959162395] [2020-10-13 04:26:50,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:26:50,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:26:50,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:50,988 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 22 states. [2020-10-13 04:26:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:51,158 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 04:26:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:26:51,158 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-13 04:26:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:51,159 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:26:51,160 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:26:51,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:26:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:26:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:26:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 04:26:51,166 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-10-13 04:26:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:51,166 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 04:26:51,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:26:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 04:26:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:26:51,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:51,167 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:51,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:26:51,168 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:51,168 INFO L82 PathProgramCache]: Analyzing trace with hash -275879884, now seen corresponding path program 19 times [2020-10-13 04:26:51,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:51,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423337924] [2020-10-13 04:26:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3083 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:26:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:54,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:54,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:54,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:54,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423337924] [2020-10-13 04:26:54,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:54,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:26:54,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547177622] [2020-10-13 04:26:54,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:26:54,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:26:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:26:54,606 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2020-10-13 04:26:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:54,864 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 04:26:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:26:54,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 04:26:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:54,866 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:26:54,866 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:26:54,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:26:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:26:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:26:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:26:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 04:26:54,871 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 51 [2020-10-13 04:26:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:54,871 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 04:26:54,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:26:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 04:26:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:26:54,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:54,872 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:54,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:26:54,872 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1197355474, now seen corresponding path program 20 times [2020-10-13 04:26:54,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:54,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205681176] [2020-10-13 04:26:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:54,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4378 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:26:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:59,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:59,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205681176] [2020-10-13 04:26:59,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:59,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:26:59,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455264900] [2020-10-13 04:26:59,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:26:59,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:26:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:26:59,702 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states. [2020-10-13 04:26:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:59,910 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 04:26:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:26:59,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-13 04:26:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:59,911 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:26:59,912 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:59,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:26:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 04:26:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:26:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 04:26:59,919 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 53 [2020-10-13 04:26:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:59,919 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 04:26:59,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:26:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 04:26:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:26:59,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:59,920 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:59,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:26:59,920 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash -362673168, now seen corresponding path program 21 times [2020-10-13 04:26:59,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:59,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432220853] [2020-10-13 04:26:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:04,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4803 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:27:04,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:05,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:05,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:05,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:05,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:05,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:05,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:05,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:05,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432220853] [2020-10-13 04:27:05,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:05,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:27:05,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050223689] [2020-10-13 04:27:05,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:27:05,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:27:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:27:05,147 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 25 states. [2020-10-13 04:27:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:05,328 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-13 04:27:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:27:05,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 04:27:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:05,332 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:27:05,332 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 04:27:05,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:27:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 04:27:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 04:27:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:27:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 04:27:05,336 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2020-10-13 04:27:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:05,336 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 04:27:05,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:27:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 04:27:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:27:05,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:05,337 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:05,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:27:05,338 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:05,338 INFO L82 PathProgramCache]: Analyzing trace with hash -606611826, now seen corresponding path program 22 times [2020-10-13 04:27:05,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:05,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329897896] [2020-10-13 04:27:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:27:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:27:10,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:27:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:27:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:10,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:10,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:10,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:10,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:10,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:10,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:10,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329897896] [2020-10-13 04:27:10,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:10,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:27:10,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747143653] [2020-10-13 04:27:10,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:27:10,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:27:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:27:10,755 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2020-10-13 04:27:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:10,980 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-13 04:27:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:27:10,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-13 04:27:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:10,981 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:27:10,981 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:27:10,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:27:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:27:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:27:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:27:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 04:27:10,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2020-10-13 04:27:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:10,987 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 04:27:10,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:27:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 04:27:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:27:10,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:10,988 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:10,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:27:10,988 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:10,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1191539116, now seen corresponding path program 23 times [2020-10-13 04:27:10,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:10,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893993443] [2020-10-13 04:27:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:11,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:16,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:27:16,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:16,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:27:16,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:27:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:27:16,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:16,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:16,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:16,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:16,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:16,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:16,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:16,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:27:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:16,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893993443] [2020-10-13 04:27:16,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:16,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:27:16,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222892062] [2020-10-13 04:27:16,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:27:16,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:16,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:27:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:16,442 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 27 states. [2020-10-13 04:27:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:16,734 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-13 04:27:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:27:16,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-13 04:27:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:16,736 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:27:16,736 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:27:16,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:27:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:27:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:27:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 04:27:16,743 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 59 [2020-10-13 04:27:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:16,743 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 04:27:16,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:27:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 04:27:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:27:16,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:16,744 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:16,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:27:16,745 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225910, now seen corresponding path program 24 times [2020-10-13 04:27:16,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:16,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925148946] [2020-10-13 04:27:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:21,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:27:21,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:21,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:21,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:21,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:27:21,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:21,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:27:21,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:22,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:22,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:22,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:22,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925148946] [2020-10-13 04:27:22,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:22,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:27:22,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886498283] [2020-10-13 04:27:22,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:27:22,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:27:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:22,235 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 28 states. [2020-10-13 04:27:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:22,440 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-13 04:27:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:27:22,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-13 04:27:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:22,442 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:27:22,442 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:27:22,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:27:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:27:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:27:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 04:27:22,452 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2020-10-13 04:27:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:22,452 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 04:27:22,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:27:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 04:27:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:27:22,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:22,453 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:22,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:27:22,453 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash 868718952, now seen corresponding path program 25 times [2020-10-13 04:27:22,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:22,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670316561] [2020-10-13 04:27:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:27:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:27:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:27,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:27,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:27,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:27,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:27,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:27,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:27,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:27,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670316561] [2020-10-13 04:27:27,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:27,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:27:27,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971223815] [2020-10-13 04:27:27,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:27:27,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:27:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:27:27,991 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 29 states. [2020-10-13 04:27:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:28,164 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 04:27:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:27:28,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-13 04:27:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:28,166 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:27:28,166 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:27:28,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:27:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:27:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:27:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:27:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 04:27:28,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 63 [2020-10-13 04:27:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:28,174 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 04:27:28,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:27:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 04:27:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:27:28,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:28,175 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:28,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:27:28,176 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1645209094, now seen corresponding path program 26 times [2020-10-13 04:27:28,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:28,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78899890] [2020-10-13 04:27:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:27:33,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:33,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:33,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:33,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:33,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78899890] [2020-10-13 04:27:33,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:33,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:27:33,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995352438] [2020-10-13 04:27:33,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:27:33,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:27:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:27:33,712 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 30 states. [2020-10-13 04:27:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:33,892 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 04:27:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:27:33,893 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-13 04:27:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:33,894 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:27:33,894 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:27:33,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:27:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:27:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 04:27:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:27:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 04:27:33,900 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2020-10-13 04:27:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:33,900 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 04:27:33,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:27:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 04:27:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:27:33,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:33,901 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:33,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:27:33,902 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash 527926052, now seen corresponding path program 27 times [2020-10-13 04:27:33,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:33,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722139900] [2020-10-13 04:27:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:34,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:27:38,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:39,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:39,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:39,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:39,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:39,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:39,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:39,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:39,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:39,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:39,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:39,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722139900] [2020-10-13 04:27:39,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:39,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:27:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036439310] [2020-10-13 04:27:39,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:27:39,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:27:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:27:39,487 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 31 states. [2020-10-13 04:27:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:39,718 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-13 04:27:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:27:39,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-13 04:27:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:39,720 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:27:39,720 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:27:39,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:27:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:27:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 04:27:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:27:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 04:27:39,725 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 67 [2020-10-13 04:27:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:39,725 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 04:27:39,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:27:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 04:27:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:27:39,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:39,726 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:39,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:27:39,727 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash 560746690, now seen corresponding path program 28 times [2020-10-13 04:27:39,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:39,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630911417] [2020-10-13 04:27:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:39,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:40,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:45,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:45,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:27:45,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:45,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5942 [2020-10-13 04:27:45,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:27:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:27:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:46,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:46,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630911417] [2020-10-13 04:27:46,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:46,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:27:46,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133942010] [2020-10-13 04:27:46,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:27:46,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:46,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:27:46,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:27:46,299 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 32 states. [2020-10-13 04:27:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:46,614 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 04:27:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:27:46,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-13 04:27:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:46,616 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:27:46,616 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:27:46,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:27:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:27:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:27:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:27:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 04:27:46,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 69 [2020-10-13 04:27:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:46,627 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 04:27:46,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:27:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 04:27:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:27:46,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:46,628 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:46,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:27:46,628 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2036608736, now seen corresponding path program 29 times [2020-10-13 04:27:46,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:46,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344865051] [2020-10-13 04:27:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:52,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:27:52,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6037 [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:27:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:53,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:53,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:53,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:53,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:53,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:53,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344865051] [2020-10-13 04:27:53,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:53,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:27:53,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087251699] [2020-10-13 04:27:53,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:27:53,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:27:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:27:53,323 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 33 states. [2020-10-13 04:27:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:53,650 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 04:27:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:27:53,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-13 04:27:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:53,652 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:27:53,652 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:27:53,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:27:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:27:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 04:27:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:27:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 04:27:53,658 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2020-10-13 04:27:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:53,658 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 04:27:53,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:27:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 04:27:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:27:53,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:53,659 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:53,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:27:53,659 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:53,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1294140034, now seen corresponding path program 30 times [2020-10-13 04:27:53,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:53,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852362546] [2020-10-13 04:27:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:54,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:28:02,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:02,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8765 [2020-10-13 04:28:02,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:28:02,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:02,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:28:02,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:03,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:03,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:03,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:03,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:03,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:03,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:03,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:03,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:28:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:28:03,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852362546] [2020-10-13 04:28:03,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:03,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:28:03,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264141184] [2020-10-13 04:28:03,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:28:03,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:28:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:28:03,130 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 34 states. [2020-10-13 04:28:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:03,376 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-13 04:28:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:28:03,376 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-13 04:28:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:03,377 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:28:03,377 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:28:03,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:28:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:28:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:28:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:28:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 04:28:03,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2020-10-13 04:28:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:03,384 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 04:28:03,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:28:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 04:28:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:28:03,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:03,385 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:03,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:28:03,385 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1901894812, now seen corresponding path program 31 times [2020-10-13 04:28:03,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:03,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045141071] [2020-10-13 04:28:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:28:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:09,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 04:28:09,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045141071] [2020-10-13 04:28:09,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:09,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:28:09,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000601590] [2020-10-13 04:28:09,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:28:09,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:28:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:28:09,595 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 9 states. [2020-10-13 04:28:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:09,806 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-10-13 04:28:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:28:09,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-13 04:28:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:09,807 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:28:09,808 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:28:09,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:28:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:28:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-13 04:28:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:28:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 04:28:09,815 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 75 [2020-10-13 04:28:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:09,816 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 04:28:09,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:28:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 04:28:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:28:09,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:09,817 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:09,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:28:09,818 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1208086829, now seen corresponding path program 1 times [2020-10-13 04:28:09,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:09,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645003087] [2020-10-13 04:28:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:10,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9396 [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:28:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:19,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:28:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:19,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:19,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 04:28:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:19,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:28:19,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645003087] [2020-10-13 04:28:19,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:19,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:28:19,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227191092] [2020-10-13 04:28:19,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:28:19,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:28:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:28:19,983 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 35 states. [2020-10-13 04:28:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:20,212 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-13 04:28:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:28:20,214 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-10-13 04:28:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:20,218 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:28:20,218 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:28:20,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:28:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:28:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:28:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:28:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 04:28:20,226 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-10-13 04:28:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:20,226 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 04:28:20,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:28:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 04:28:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:28:20,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:20,228 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:20,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:28:20,228 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash 563077233, now seen corresponding path program 2 times [2020-10-13 04:28:20,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:20,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763668829] [2020-10-13 04:28:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8034 [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:28:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 04:28:28,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:29,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:29,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:29,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:29,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:29,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 04:28:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:29,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:29,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:29,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:29,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 04:28:29,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763668829] [2020-10-13 04:28:29,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:29,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:28:29,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782099897] [2020-10-13 04:28:29,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:28:29,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:28:29,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:28:29,501 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 10 states. [2020-10-13 04:28:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:29,694 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-10-13 04:28:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:28:29,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-10-13 04:28:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:29,696 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:28:29,696 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:28:29,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:28:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:28:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-13 04:28:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:28:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-13 04:28:29,705 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 85 [2020-10-13 04:28:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:29,705 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-13 04:28:29,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:28:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-13 04:28:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 04:28:29,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:29,706 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:29,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:28:29,707 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash -886133336, now seen corresponding path program 3 times [2020-10-13 04:28:29,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:29,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455931908] [2020-10-13 04:28:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:29,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:28:40,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10281 [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:28:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:40,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:40,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:40,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 04:28:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:40,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 04:28:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:40,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:40,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:40,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:40,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:40,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:40,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 4 proven. 1024 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:28:40,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455931908] [2020-10-13 04:28:40,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:40,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:28:40,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188231780] [2020-10-13 04:28:40,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:28:40,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:40,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:28:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:28:40,808 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 36 states. [2020-10-13 04:28:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:41,076 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-13 04:28:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:28:41,077 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2020-10-13 04:28:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:41,078 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:28:41,079 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:28:41,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:28:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:28:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-13 04:28:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:28:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-13 04:28:41,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2020-10-13 04:28:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:41,087 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-13 04:28:41,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:28:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-13 04:28:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:28:41,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:41,089 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:41,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:28:41,089 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash -829058618, now seen corresponding path program 4 times [2020-10-13 04:28:41,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:41,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101996161] [2020-10-13 04:28:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10713 [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:28:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:28:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 04:28:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:52,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:52,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:52,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:52,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:52,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:52,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 04:28:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:52,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 4 proven. 1089 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:28:52,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101996161] [2020-10-13 04:28:52,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:52,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:28:52,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189247282] [2020-10-13 04:28:52,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:28:52,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:28:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:28:52,670 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 37 states. [2020-10-13 04:28:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:52,877 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-10-13 04:28:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:28:52,878 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 95 [2020-10-13 04:28:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:52,883 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:28:52,883 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:28:52,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:28:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:28:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 04:28:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:28:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 04:28:52,900 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2020-10-13 04:28:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:52,900 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 04:28:52,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:28:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 04:28:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:28:52,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:52,901 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:52,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:28:52,905 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1814829468, now seen corresponding path program 5 times [2020-10-13 04:28:52,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:52,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598124349] [2020-10-13 04:28:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:02,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:02,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:29:02,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:02,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9282 [2020-10-13 04:29:02,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:29:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:02,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:29:02,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:03,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:03,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:03,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:03,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 04:29:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:03,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:03,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:03,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 04:29:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:03,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:03,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 4 proven. 1156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:03,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598124349] [2020-10-13 04:29:03,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:03,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:29:03,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101021299] [2020-10-13 04:29:03,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:29:03,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:03,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:29:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:29:03,097 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 38 states. [2020-10-13 04:29:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:03,293 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-13 04:29:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:29:03,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2020-10-13 04:29:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:03,295 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:29:03,295 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:29:03,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:29:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:29:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:29:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:29:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-13 04:29:03,305 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2020-10-13 04:29:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:03,305 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-13 04:29:03,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:29:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-13 04:29:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:29:03,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:03,306 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:03,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:29:03,306 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash 47156098, now seen corresponding path program 6 times [2020-10-13 04:29:03,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:03,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617572079] [2020-10-13 04:29:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:21,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:21,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:29:21,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17878 [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:29:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:22,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:22,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:22,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:22,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:22,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:22,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 04:29:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:22,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:22,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:22,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:22,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:22,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 04:29:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:22,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:22,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:22,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:22,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 4 proven. 1225 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:22,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617572079] [2020-10-13 04:29:22,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:22,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:29:22,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577060059] [2020-10-13 04:29:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:29:22,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:29:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:29:22,132 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 39 states. [2020-10-13 04:29:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:22,348 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-10-13 04:29:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:29:22,349 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 99 [2020-10-13 04:29:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:22,350 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:29:22,351 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:29:22,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:29:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:29:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:29:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:29:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-13 04:29:22,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-10-13 04:29:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:22,360 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-13 04:29:22,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:29:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-13 04:29:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:29:22,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:22,361 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:22,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:29:22,362 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:22,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1586077408, now seen corresponding path program 7 times [2020-10-13 04:29:22,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:22,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344509572] [2020-10-13 04:29:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:22,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:29:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17325 [2020-10-13 04:29:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:29:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:29:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:40,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:40,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:40,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:40,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 04:29:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:40,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:40,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 04:29:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:40,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 4 proven. 1296 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:40,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344509572] [2020-10-13 04:29:40,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:40,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:29:40,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386347634] [2020-10-13 04:29:40,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:29:40,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:29:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:29:40,696 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 40 states. [2020-10-13 04:29:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:40,978 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-10-13 04:29:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:29:40,978 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 101 [2020-10-13 04:29:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:40,980 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:29:40,980 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:29:40,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:29:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:29:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:29:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:29:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 04:29:40,988 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2020-10-13 04:29:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:40,988 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 04:29:40,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:29:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 04:29:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:29:40,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:40,990 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:40,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:29:40,990 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 834553662, now seen corresponding path program 8 times [2020-10-13 04:29:40,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:40,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433258442] [2020-10-13 04:29:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:41,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking...