/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-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:34:25,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:34:25,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:34:25,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:34:25,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:34:25,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:34:25,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:34:25,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:34:25,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:34:25,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:34:25,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:34:25,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:34:25,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:34:25,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:34:25,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:34:25,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:34:25,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:34:25,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:34:25,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:34:25,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:34:25,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:34:25,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:34:25,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:34:25,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:34:25,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:34:25,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:34:25,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:34:25,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:34:25,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:34:25,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:34:25,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:34:25,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:34:25,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:34:25,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:34:25,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:34:25,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:34:25,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:34:25,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:34:25,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:34:25,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:34:25,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:34:25,417 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 04:34:25,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:34:25,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:34:25,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:34:25,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:34:25,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:34:25,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:34:25,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:34:25,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:34:25,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:34:25,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:34:25,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:34:25,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:34:25,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:34:25,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:34:25,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:34:25,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:34:25,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:34:25,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:34:25,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:34:25,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:34:25,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:34:25,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:34:25,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:34:25,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:34:25,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:34:25,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:34:25,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:34:25,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:34:25,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:34:25,466 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 04:34:25,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:34:25,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:34:25,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:34:25,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:34:25,790 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:34:25,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2020-10-13 04:34:25,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb803ce/018e2b678cc04da7a653428a7e988ec7/FLAG4671bf573 [2020-10-13 04:34:26,285 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:34:26,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2020-10-13 04:34:26,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb803ce/018e2b678cc04da7a653428a7e988ec7/FLAG4671bf573 [2020-10-13 04:34:26,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dbb803ce/018e2b678cc04da7a653428a7e988ec7 [2020-10-13 04:34:26,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:34:26,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:34:26,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:34:26,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:34:26,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:34:26,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:34:26" (1/1) ... [2020-10-13 04:34:26,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396e528d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:26, skipping insertion in model container [2020-10-13 04:34:26,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:34:26" (1/1) ... [2020-10-13 04:34:26,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:34:26,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:34:26,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:34:26,936 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:34:26,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:34:27,075 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:34:27,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27 WrapperNode [2020-10-13 04:34:27,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:34:27,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:34:27,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:34:27,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:34:27,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (1/1) ... [2020-10-13 04:34:27,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:34:27,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:34:27,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:34:27,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:34:27,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (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 04:34:27,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:34:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:34:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:34:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:34:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:34:27,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:34:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:34:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:34:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:34:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:34:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:34:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:34:27,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:34:27,714 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:34:27,715 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 04:34:27,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:34:27 BoogieIcfgContainer [2020-10-13 04:34:27,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:34:27,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:34:27,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:34:27,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:34:27,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:34:26" (1/3) ... [2020-10-13 04:34:27,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fdf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:34:27, skipping insertion in model container [2020-10-13 04:34:27,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:27" (2/3) ... [2020-10-13 04:34:27,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fdf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:34:27, skipping insertion in model container [2020-10-13 04:34:27,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:34:27" (3/3) ... [2020-10-13 04:34:27,731 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2020-10-13 04:34:27,743 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:34:27,752 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:34:27,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:34:27,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:34:27,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:34:27,807 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:34:27,807 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:34:27,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:34:27,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:34:27,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:34:27,808 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:34:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 04:34:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:34:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:27,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:27,838 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1057208235, now seen corresponding path program 1 times [2020-10-13 04:34:27,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:27,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491125190] [2020-10-13 04:34:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:29,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:34:29,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:34:29,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-13 04:34:29,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:34:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:34:29,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:29,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:29,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:29,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:34:29,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:29,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:29,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:29,155 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 04:34:29,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491125190] [2020-10-13 04:34:29,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:29,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:34:29,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880545846] [2020-10-13 04:34:29,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:34:29,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:34:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:34:29,186 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 04:34:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:29,367 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2020-10-13 04:34:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:34:29,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 04:34:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:29,383 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:34:29,384 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:34:29,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:34:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:34:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:34:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:34:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 04:34:29,445 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-10-13 04:34:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:29,446 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 04:34:29,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:34:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 04:34:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:34:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:29,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:29,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:34:29,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1855360189, now seen corresponding path program 1 times [2020-10-13 04:34:29,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:29,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266335501] [2020-10-13 04:34:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:29,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:33,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:34:33,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:34:33,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4004 [2020-10-13 04:34:33,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:33,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:34:33,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:33,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:34:33,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:33,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:33,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:33,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:33,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:34:33,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:33,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:33,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:33,554 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 04:34:33,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266335501] [2020-10-13 04:34:33,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:33,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:34:33,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406648705] [2020-10-13 04:34:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:34:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:34:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:34:33,561 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-13 04:34:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:33,806 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 04:34:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:34:33,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 04:34:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:33,809 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:34:33,809 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:34:33,810 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 04:34:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:34:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 04:34:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:34:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 04:34:33,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-13 04:34:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:33,832 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 04:34:33,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:34:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 04:34:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:34:33,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:33,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:33,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:34:33,838 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2113804129, now seen corresponding path program 1 times [2020-10-13 04:34:33,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:33,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397409637] [2020-10-13 04:34:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:38,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:38,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:34:38,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:34:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:34:38,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:34:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:34:38,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:38,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:38,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:38,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:38,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:38,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:38,906 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 04:34:38,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397409637] [2020-10-13 04:34:38,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:38,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:34:38,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744764155] [2020-10-13 04:34:38,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:34:38,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:34:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:34:38,909 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-10-13 04:34:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:39,021 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-13 04:34:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:34:39,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 04:34:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:39,023 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:34:39,023 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:34:39,024 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 04:34:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:34:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 04:34:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:34:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 04:34:39,031 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2020-10-13 04:34:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:39,031 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 04:34:39,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:34:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 04:34:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:34:39,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:39,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:39,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:34:39,034 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1745212417, now seen corresponding path program 2 times [2020-10-13 04:34:39,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:39,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254293698] [2020-10-13 04:34:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:40,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:42,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:34:42,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:34:42,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3639 [2020-10-13 04:34:42,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:42,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:34:42,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:42,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:34:42,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:42,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:42,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:42,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:42,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:42,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:42,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:42,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:34:42,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254293698] [2020-10-13 04:34:42,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:42,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:34:42,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532195938] [2020-10-13 04:34:42,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:34:42,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:34:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:34:42,738 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2020-10-13 04:34:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:42,905 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-13 04:34:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:34:42,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 04:34:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:42,907 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:34:42,908 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:34:42,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:34:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:34:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-13 04:34:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:34:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-13 04:34:42,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 28 [2020-10-13 04:34:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:42,917 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-13 04:34:42,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:34:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-13 04:34:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:34:42,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:42,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:42,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:34:42,920 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash -632984333, now seen corresponding path program 1 times [2020-10-13 04:34:42,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:42,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975728125] [2020-10-13 04:34:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:43,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:47,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:47,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:34:47,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:34:47,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:34:47,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:34:47,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:34:47,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:47,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:48,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:48,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:48,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:48,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:34:48,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:48,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:34:48,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975728125] [2020-10-13 04:34:48,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:48,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:34:48,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042883995] [2020-10-13 04:34:48,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:34:48,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:34:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:34:48,011 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-10-13 04:34:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:48,205 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-13 04:34:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:34:48,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-13 04:34:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:48,207 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:34:48,207 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:34:48,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:34:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:34:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 04:34:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 04:34:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 04:34:48,216 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2020-10-13 04:34:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:48,216 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 04:34:48,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:34:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 04:34:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:34:48,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:48,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:48,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:34:48,219 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1896329191, now seen corresponding path program 2 times [2020-10-13 04:34:48,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:48,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216921082] [2020-10-13 04:34:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:52,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:53,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:53,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:34:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:34:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:34:53,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:34:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:34:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:34:54,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:54,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:54,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:54,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:54,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:54,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:54,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:54,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:54,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:54,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:34:54,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216921082] [2020-10-13 04:34:54,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:54,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:34:54,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907572928] [2020-10-13 04:34:54,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:34:54,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:34:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:34:54,421 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2020-10-13 04:34:54,610 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2020-10-13 04:34:55,036 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-13 04:34:55,941 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-13 04:34:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:56,570 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-13 04:34:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:34:56,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 04:34:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:56,573 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:34:56,574 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:34:56,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:34:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:34:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 04:34:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:34:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-13 04:34:56,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2020-10-13 04:34:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:56,599 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-13 04:34:56,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:34:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-13 04:34:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:34:56,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:56,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:56,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:34:56,606 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash 26946245, now seen corresponding path program 3 times [2020-10-13 04:34:56,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:56,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97518688] [2020-10-13 04:34:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:01,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:01,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:35:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:35:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:35:01,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:35:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:01,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:35:01,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:01,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:01,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:01,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:01,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 04:35:01,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97518688] [2020-10-13 04:35:01,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:01,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:35:01,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776444120] [2020-10-13 04:35:01,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:35:01,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:35:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:35:01,754 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-10-13 04:35:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:02,202 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2020-10-13 04:35:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:35:02,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 04:35:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:02,204 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:35:02,204 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:35:02,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:35:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:35:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2020-10-13 04:35:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:35:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-13 04:35:02,216 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2020-10-13 04:35:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:02,217 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-13 04:35:02,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:35:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-13 04:35:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:35:02,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:02,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:02,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:35:02,219 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1187006051, now seen corresponding path program 4 times [2020-10-13 04:35:02,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:02,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741753909] [2020-10-13 04:35:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:07,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:07,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:35:07,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:35:07,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:35:07,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:35:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:35:07,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:35:07,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:07,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:07,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:07,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:07,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:07,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:07,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:35:07,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741753909] [2020-10-13 04:35:07,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:07,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:35:07,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790053183] [2020-10-13 04:35:07,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:35:07,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:07,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:35:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:35:07,333 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 10 states. [2020-10-13 04:35:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:07,724 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-13 04:35:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:35:07,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 04:35:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:07,726 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:35:07,726 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:35:07,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:35:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:35:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 04:35:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:35:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-13 04:35:07,746 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2020-10-13 04:35:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:07,747 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-13 04:35:07,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:35:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-13 04:35:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:35:07,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:07,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:07,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:35:07,751 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1675076345, now seen corresponding path program 5 times [2020-10-13 04:35:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:07,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002231421] [2020-10-13 04:35:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:08,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:12,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:12,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:35:12,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:35:12,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:35:12,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:35:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 04:35:12,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:14,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:14,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:14,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:14,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:14,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:14,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:14,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:14,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:35:14,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002231421] [2020-10-13 04:35:14,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:14,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:35:14,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240787383] [2020-10-13 04:35:14,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:35:14,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:35:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:35:14,633 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 35 states. [2020-10-13 04:35:16,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-13 04:35:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:17,800 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-10-13 04:35:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:35:17,801 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-10-13 04:35:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:17,802 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:35:17,802 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:35:17,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 04:35:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:35:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-13 04:35:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:35:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-13 04:35:17,831 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 66 [2020-10-13 04:35:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:17,831 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-13 04:35:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:35:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-13 04:35:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:35:17,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:17,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:17,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:35:17,836 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash -739200681, now seen corresponding path program 6 times [2020-10-13 04:35:17,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:17,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160630740] [2020-10-13 04:35:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:17,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:18,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:22,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:22,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:35:22,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:35:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:35:22,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:35:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:22,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:35:22,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:22,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:22,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:22,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:22,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:22,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:35:22,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160630740] [2020-10-13 04:35:22,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:22,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:35:22,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866811734] [2020-10-13 04:35:22,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:35:22,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:35:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:35:22,958 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 12 states. [2020-10-13 04:35:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:23,470 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2020-10-13 04:35:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:35:23,471 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 04:35:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:23,473 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:35:23,473 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:35:23,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:35:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:35:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2020-10-13 04:35:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:35:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-13 04:35:23,486 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 68 [2020-10-13 04:35:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:23,486 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-13 04:35:23,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:35:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-13 04:35:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:35:23,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:23,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:23,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:35:23,488 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1307975797, now seen corresponding path program 7 times [2020-10-13 04:35:23,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:23,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404933963] [2020-10-13 04:35:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:28,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:35:28,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 04:35:28,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:35:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:28,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:28,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:28,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:28,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:28,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:28,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:28,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:28,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:28,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 04:35:28,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404933963] [2020-10-13 04:35:28,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:28,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:35:28,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380260499] [2020-10-13 04:35:28,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:35:28,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:35:28,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:35:28,616 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 12 states. [2020-10-13 04:35:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:29,151 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-10-13 04:35:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:35:29,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-13 04:35:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:29,154 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:35:29,154 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:35:29,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:35:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:35:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 04:35:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 04:35:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-13 04:35:29,163 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 70 [2020-10-13 04:35:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:29,164 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-13 04:35:29,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:35:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-13 04:35:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:35:29,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:29,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:29,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:35:29,166 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:29,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:29,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1601457803, now seen corresponding path program 8 times [2020-10-13 04:35:29,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:29,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052107992] [2020-10-13 04:35:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:30,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:34,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:34,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5286 [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 04:35:34,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:36,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:36,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:36,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:35:36,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052107992] [2020-10-13 04:35:36,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:36,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:35:36,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23672729] [2020-10-13 04:35:36,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:35:36,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:35:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:35:36,620 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 40 states. [2020-10-13 04:35:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:40,216 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-13 04:35:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:35:40,217 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 80 [2020-10-13 04:35:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:40,219 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:35:40,219 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:35:40,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:35:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:35:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-10-13 04:35:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:35:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-13 04:35:40,243 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 80 [2020-10-13 04:35:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:40,245 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-13 04:35:40,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:35:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-13 04:35:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:35:40,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:40,247 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:40,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:35:40,247 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2049101929, now seen corresponding path program 9 times [2020-10-13 04:35:40,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:40,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888620800] [2020-10-13 04:35:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:40,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:40,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:40,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:40,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:45,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:45,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:35:45,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:35:45,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:35:45,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:35:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:35:45,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:45,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:45,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:45,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:45,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:45,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:45,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:45,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 04:35:45,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888620800] [2020-10-13 04:35:45,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:45,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:35:45,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834397560] [2020-10-13 04:35:45,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:35:45,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:35:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:35:45,423 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 14 states. [2020-10-13 04:35:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:46,196 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-10-13 04:35:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:35:46,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-13 04:35:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:46,199 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:35:46,199 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:35:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:35:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:35:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2020-10-13 04:35:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:35:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-10-13 04:35:46,225 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 82 [2020-10-13 04:35:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:46,225 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-10-13 04:35:46,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:35:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-10-13 04:35:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:35:46,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:46,228 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:46,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:35:46,228 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash 842035975, now seen corresponding path program 10 times [2020-10-13 04:35:46,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:46,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201727719] [2020-10-13 04:35:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:46,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:35:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:35:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:35:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:51,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:51,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-13 04:35:51,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201727719] [2020-10-13 04:35:51,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:35:51,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722151325] [2020-10-13 04:35:51,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:35:51,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:51,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:35:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:35:51,378 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 14 states. [2020-10-13 04:35:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:51,987 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-13 04:35:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:35:51,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 84 [2020-10-13 04:35:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:51,989 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:35:51,989 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:35:51,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:35:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:35:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 04:35:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 04:35:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-13 04:35:51,999 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 84 [2020-10-13 04:35:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:52,000 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-13 04:35:52,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:35:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-13 04:35:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:35:52,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:52,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:52,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:35:52,003 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 939578013, now seen corresponding path program 11 times [2020-10-13 04:35:52,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:52,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377171842] [2020-10-13 04:35:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:53,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:57,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:57,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:35:57,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:35:57,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5549 [2020-10-13 04:35:57,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-13 04:35:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 04:35:57,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:04,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:04,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:04,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:04,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:36:04,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377171842] [2020-10-13 04:36:04,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:04,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 04:36:04,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730710585] [2020-10-13 04:36:04,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 04:36:04,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 04:36:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=3963, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 04:36:04,387 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 67 states. [2020-10-13 04:36:04,854 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 18 [2020-10-13 04:36:05,235 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 04:36:05,980 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 04:36:06,511 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-13 04:36:06,800 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-13 04:36:07,140 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 67 [2020-10-13 04:36:07,462 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-13 04:36:07,764 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-13 04:36:08,339 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-13 04:36:08,855 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-13 04:36:10,178 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-13 04:36:10,531 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 04:36:10,789 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 04:36:11,141 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-10-13 04:36:11,452 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-13 04:36:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:14,681 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2020-10-13 04:36:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:36:14,682 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 94 [2020-10-13 04:36:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:14,683 INFO L225 Difference]: With dead ends: 201 [2020-10-13 04:36:14,684 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 04:36:14,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1129, Invalid=8377, Unknown=0, NotChecked=0, Total=9506 [2020-10-13 04:36:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 04:36:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 04:36:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:36:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-10-13 04:36:14,696 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 94 [2020-10-13 04:36:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:14,697 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-10-13 04:36:14,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 04:36:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-10-13 04:36:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:36:14,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:14,698 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:14,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:36:14,699 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1669953595, now seen corresponding path program 12 times [2020-10-13 04:36:14,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:14,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014085142] [2020-10-13 04:36:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:14,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:19,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:19,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:36:19,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:36:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:19,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:19,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:19,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:19,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:19,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:19,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:19,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-13 04:36:19,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014085142] [2020-10-13 04:36:19,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:19,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:36:19,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567514299] [2020-10-13 04:36:19,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:36:19,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:36:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:36:19,900 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 16 states. [2020-10-13 04:36:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:20,910 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2020-10-13 04:36:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:36:20,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-13 04:36:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:20,913 INFO L225 Difference]: With dead ends: 174 [2020-10-13 04:36:20,913 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:36:20,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:36:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:36:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 04:36:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:36:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-13 04:36:20,923 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 96 [2020-10-13 04:36:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:20,923 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-13 04:36:20,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:36:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-13 04:36:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 04:36:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:20,925 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:20,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:36:20,925 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1235767087, now seen corresponding path program 13 times [2020-10-13 04:36:20,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:20,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695348980] [2020-10-13 04:36:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:27,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:27,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:36:27,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:36:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6317 [2020-10-13 04:36:27,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-13 04:36:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 04:36:27,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:28,219 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-10-13 04:36:39,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:39,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:39,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:39,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:39,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:39,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:39,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:39,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:39,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 25 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:36:39,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695348980] [2020-10-13 04:36:39,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:39,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-13 04:36:39,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153684575] [2020-10-13 04:36:39,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-13 04:36:39,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-13 04:36:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=6611, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 04:36:39,490 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 85 states. [2020-10-13 04:36:40,104 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 18 [2020-10-13 04:36:40,649 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-13 04:36:43,220 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-13 04:36:43,629 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-13 04:36:44,133 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-13 04:36:44,526 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-13 04:36:45,039 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 51 [2020-10-13 04:36:45,530 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-13 04:36:46,340 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-13 04:36:46,873 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-13 04:36:49,487 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-13 04:36:50,058 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 54 [2020-10-13 04:36:50,558 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 04:36:51,286 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 04:36:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:58,215 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2020-10-13 04:36:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 04:36:58,216 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 108 [2020-10-13 04:36:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:58,217 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:36:58,217 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:36:58,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3895 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1238, Invalid=13282, Unknown=0, NotChecked=0, Total=14520 [2020-10-13 04:36:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:36:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 04:36:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 04:36:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-13 04:36:58,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 108 [2020-10-13 04:36:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:58,231 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-13 04:36:58,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-13 04:36:58,231 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-13 04:36:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:36:58,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:58,233 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:58,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:36:58,233 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2011707315, now seen corresponding path program 14 times [2020-10-13 04:36:58,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:58,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144653391] [2020-10-13 04:36:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:58,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:58,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:03,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:03,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:37:03,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:03,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:03,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:03,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:03,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:03,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:37:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-13 04:37:03,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144653391] [2020-10-13 04:37:03,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:03,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:37:03,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114454802] [2020-10-13 04:37:03,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:37:03,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:37:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:37:03,512 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 18 states. [2020-10-13 04:37:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:04,811 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2020-10-13 04:37:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:37:04,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 110 [2020-10-13 04:37:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:04,813 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:37:04,813 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:37:04,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:37:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:37:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-13 04:37:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:37:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-13 04:37:04,823 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 110 [2020-10-13 04:37:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:04,823 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-13 04:37:04,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:37:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-13 04:37:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:37:04,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:04,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:04,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:37:04,825 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash -895622079, now seen corresponding path program 15 times [2020-10-13 04:37:04,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:04,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201927697] [2020-10-13 04:37:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:09,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 04:37:09,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:16,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:37:16,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201927697] [2020-10-13 04:37:16,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:16,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:37:16,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684316358] [2020-10-13 04:37:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:37:16,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:37:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1965, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:37:16,603 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 46 states. [2020-10-13 04:37:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:23,562 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2020-10-13 04:37:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:37:23,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 122 [2020-10-13 04:37:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:23,566 INFO L225 Difference]: With dead ends: 210 [2020-10-13 04:37:23,566 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:37:23,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 40 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:37:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:37:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2020-10-13 04:37:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:37:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 203 transitions. [2020-10-13 04:37:23,583 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 203 transitions. Word has length 122 [2020-10-13 04:37:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:23,584 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 203 transitions. [2020-10-13 04:37:23,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:37:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 203 transitions. [2020-10-13 04:37:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 04:37:23,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:23,586 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:23,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:37:23,586 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash 949747871, now seen corresponding path program 16 times [2020-10-13 04:37:23,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:23,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845118769] [2020-10-13 04:37:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:23,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:23,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:28,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:28,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 04:37:28,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:37:28,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:37:28,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:37:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:28,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:37:28,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:28,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:28,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:28,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:28,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:37:28,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:28,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:28,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:28,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:28,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:37:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-13 04:37:28,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845118769] [2020-10-13 04:37:28,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:28,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:37:28,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556919799] [2020-10-13 04:37:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:37:28,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:37:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:37:28,964 INFO L87 Difference]: Start difference. First operand 192 states and 203 transitions. Second operand 20 states. [2020-10-13 04:37:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:30,791 INFO L93 Difference]: Finished difference Result 396 states and 422 transitions. [2020-10-13 04:37:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:37:30,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-10-13 04:37:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:30,796 INFO L225 Difference]: With dead ends: 396 [2020-10-13 04:37:30,796 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 04:37:30,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:37:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 04:37:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2020-10-13 04:37:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 04:37:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2020-10-13 04:37:30,815 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 124 [2020-10-13 04:37:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:30,816 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2020-10-13 04:37:30,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:37:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2020-10-13 04:37:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:37:30,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:30,818 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:30,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:37:30,818 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1994489277, now seen corresponding path program 17 times [2020-10-13 04:37:30,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:30,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312927788] [2020-10-13 04:37:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:30,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:31,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:35,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 04:37:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:37:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:36,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:36,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:36,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:36,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-13 04:37:36,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312927788] [2020-10-13 04:37:36,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:36,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:37:36,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524945228] [2020-10-13 04:37:36,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:37:36,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:37:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:37:36,164 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 20 states. [2020-10-13 04:37:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:38,055 INFO L93 Difference]: Finished difference Result 206 states and 216 transitions. [2020-10-13 04:37:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:37:38,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 126 [2020-10-13 04:37:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:38,058 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:37:38,059 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:37:38,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:37:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:37:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-13 04:37:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:37:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2020-10-13 04:37:38,072 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 126 [2020-10-13 04:37:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:38,073 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2020-10-13 04:37:38,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:37:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2020-10-13 04:37:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:37:38,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:38,074 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:38,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:37:38,075 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1659063853, now seen corresponding path program 18 times [2020-10-13 04:37:38,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:38,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553586848] [2020-10-13 04:37:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:43,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 100 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:43,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 04:37:43,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:54,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:54,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:54,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:54,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:54,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:54,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:54,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:54,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:54,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:54,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:54,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:37:54,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553586848] [2020-10-13 04:37:54,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:54,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 04:37:54,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838936272] [2020-10-13 04:37:54,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 04:37:54,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 04:37:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3164, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:37:54,424 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand 58 states. [2020-10-13 04:38:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:06,839 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2020-10-13 04:38:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:38:06,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 136 [2020-10-13 04:38:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:06,845 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:38:06,845 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 04:38:06,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 38 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=152, Invalid=3388, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 04:38:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 04:38:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2020-10-13 04:38:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:38:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 225 transitions. [2020-10-13 04:38:06,867 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 225 transitions. Word has length 136 [2020-10-13 04:38:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:06,868 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 225 transitions. [2020-10-13 04:38:06,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 04:38:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 225 transitions. [2020-10-13 04:38:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 04:38:06,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:06,869 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:06,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:38:06,870 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash -920665679, now seen corresponding path program 19 times [2020-10-13 04:38:06,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961640258] [2020-10-13 04:38:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking...