/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-fpi/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:10:27,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:10:27,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:10:27,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:10:27,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:10:27,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:10:27,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:10:27,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:10:27,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:10:27,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:10:27,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:10:27,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:10:27,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:10:27,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:10:27,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:10:27,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:10:27,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:10:27,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:10:27,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:10:27,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:10:27,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:10:27,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:10:27,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:10:27,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:10:27,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:10:27,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:10:27,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:10:27,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:10:27,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:10:27,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:10:27,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:10:27,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:10:27,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:10:27,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:10:27,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:10:27,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:10:27,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:10:27,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:10:27,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:10:27,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:10:27,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:10:27,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:10:27,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:10:27,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:10:27,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:10:27,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:10:27,451 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:10:27,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:10:27,452 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:10:27,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:10:27,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:10:27,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:10:27,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:10:27,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:10:27,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:10:27,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:10:27,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:10:27,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:10:27,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:10:27,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:10:27,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:10:27,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:10:27,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:10:27,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:10:27,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:10:27,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:10:27,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:10:27,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:10:27,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:10:27,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:10:27,791 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:10:27,791 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:10:27,792 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-13 05:10:27,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb05711a0/12bc8ef3bcb341419907d388f6dacccd/FLAG6c3a00c85 [2020-10-13 05:10:28,404 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:10:28,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-13 05:10:28,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb05711a0/12bc8ef3bcb341419907d388f6dacccd/FLAG6c3a00c85 [2020-10-13 05:10:28,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb05711a0/12bc8ef3bcb341419907d388f6dacccd [2020-10-13 05:10:28,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:10:28,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:10:28,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:10:28,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:10:28,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:10:28,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:28,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44406637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28, skipping insertion in model container [2020-10-13 05:10:28,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:28,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:10:28,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:10:28,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:10:28,949 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:10:28,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:10:28,988 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:10:28,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28 WrapperNode [2020-10-13 05:10:28,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:10:28,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:10:28,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:10:28,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:10:29,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... [2020-10-13 05:10:29,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:10:29,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:10:29,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:10:29,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:10:29,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:10:29,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:10:29,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:10:29,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:10:29,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:10:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:10:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:10:29,492 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:10:29,493 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:10:29,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:10:29 BoogieIcfgContainer [2020-10-13 05:10:29,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:10:29,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:10:29,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:10:29,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:10:29,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:10:28" (1/3) ... [2020-10-13 05:10:29,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a87a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:10:29, skipping insertion in model container [2020-10-13 05:10:29,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:10:28" (2/3) ... [2020-10-13 05:10:29,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a87a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:10:29, skipping insertion in model container [2020-10-13 05:10:29,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:10:29" (3/3) ... [2020-10-13 05:10:29,532 INFO L109 eAbstractionObserver]: Analyzing ICFG s2lif.c [2020-10-13 05:10:29,564 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:10:29,582 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:10:29,621 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:10:29,649 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:10:29,649 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:10:29,650 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:10:29,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:10:29,650 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:10:29,651 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:10:29,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:10:29,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:10:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 05:10:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:10:29,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:29,685 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] [2020-10-13 05:10:29,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-13 05:10:29,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:29,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475388691] [2020-10-13 05:10:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:29,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:30,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:30,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:10:30,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:10:30,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-13 05:10:30,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:30,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:30,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:10:30,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:10:31,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:31,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:31,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:31,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:10:31,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:31,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:31,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:31,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:31,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:31,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:31,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:31,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:10:31,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:10:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:31,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:31,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475388691] [2020-10-13 05:10:31,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:10:31,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:10:31,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823295934] [2020-10-13 05:10:31,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:10:31,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:10:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:10:31,121 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 05:10:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:31,278 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 05:10:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:10:31,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 05:10:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:31,292 INFO L225 Difference]: With dead ends: 60 [2020-10-13 05:10:31,293 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:10:31,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:10:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:10:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 05:10:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:10:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 05:10:31,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 05:10:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:31,361 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 05:10:31,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:10:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 05:10:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:10:31,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:31,364 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] [2020-10-13 05:10:31,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:10:31,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-10-13 05:10:31,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:31,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83357136] [2020-10-13 05:10:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:31,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:10:31,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:10:31,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-13 05:10:31,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:31,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:10:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:10:31,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:10:31,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:31,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:31,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:31,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:31,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:10:31,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:31,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:31,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:31,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:31,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:10:31,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:10:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:10:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:31,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83357136] [2020-10-13 05:10:31,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:10:31,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:10:31,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939791371] [2020-10-13 05:10:31,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:10:31,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:10:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:10:31,757 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 05:10:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:31,906 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-13 05:10:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:10:31,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 05:10:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:31,908 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:10:31,908 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:10:31,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:10:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:10:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 05:10:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:10:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 05:10:31,920 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 05:10:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:31,921 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 05:10:31,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:10:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 05:10:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:10:31,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:31,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:31,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:10:31,923 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-13 05:10:31,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:31,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512713996] [2020-10-13 05:10:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:34,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:34,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:34,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:10:34,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:10:34,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-13 05:10:34,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:34,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:10:34,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:34,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:10:34,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:35,127 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-13 05:10:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:35,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:10:35,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:35,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:35,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:35,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:35,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:35,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:35,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:35,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:35,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:35,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:35,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512713996] [2020-10-13 05:10:35,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:35,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:10:35,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728500010] [2020-10-13 05:10:35,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:10:35,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:10:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:10:35,588 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-10-13 05:10:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:36,438 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 05:10:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:10:36,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 05:10:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:36,440 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:10:36,440 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:10:36,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:10:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:10:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 05:10:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:10:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 05:10:36,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 05:10:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:36,451 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 05:10:36,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:10:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 05:10:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:10:36,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:36,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:36,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:10:36,454 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-13 05:10:36,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:36,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622607554] [2020-10-13 05:10:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:36,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:37,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:10:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:10:37,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-13 05:10:37,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:37,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:10:37,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:10:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:37,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:37,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:37,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:37,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:37,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:37,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:37,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:37,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:37,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:37,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:37,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:37,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:37,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:10:37,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622607554] [2020-10-13 05:10:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:37,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:10:37,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008893003] [2020-10-13 05:10:37,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:10:37,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:10:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:10:37,705 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-13 05:10:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:37,874 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-13 05:10:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:10:37,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:10:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:37,876 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:10:37,876 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:10:37,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:10:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:10:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 05:10:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:10:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-13 05:10:37,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-13 05:10:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:37,887 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-13 05:10:37,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:10:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-13 05:10:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:10:37,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:37,889 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] [2020-10-13 05:10:37,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:10:37,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-13 05:10:37,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:37,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200474592] [2020-10-13 05:10:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:37,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:37,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:38,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:38,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:10:38,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:10:38,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-13 05:10:38,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:38,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:10:38,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:10:38,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:10:38,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:38,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:38,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:38,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:38,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:10:38,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:38,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:38,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:38,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:38,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:38,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:38,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:38,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:38,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:10:38,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200474592] [2020-10-13 05:10:38,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:38,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:10:38,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187966069] [2020-10-13 05:10:38,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:10:38,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:10:38,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:10:38,636 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-13 05:10:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:38,863 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 05:10:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:10:38,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 05:10:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:38,865 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:10:38,866 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:10:38,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:10:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:10:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-10-13 05:10:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:10:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-13 05:10:38,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-13 05:10:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:38,875 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-13 05:10:38,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:10:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-13 05:10:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:10:38,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:38,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:38,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:10:38,877 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:38,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1341613535, now seen corresponding path program 3 times [2020-10-13 05:10:38,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:38,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394242113] [2020-10-13 05:10:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:38,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:39,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:40,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:41,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:42,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:42,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:10:42,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:10:42,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4016 [2020-10-13 05:10:42,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:42,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:10:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:10:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:10:42,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:42,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:42,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:42,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:42,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:42,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:42,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:42,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:42,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:42,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:42,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:42,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:42,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:42,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:10:42,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394242113] [2020-10-13 05:10:42,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:42,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:10:42,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308713202] [2020-10-13 05:10:42,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:10:42,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:42,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:10:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:10:42,990 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-13 05:10:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:43,202 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-13 05:10:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:10:43,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:10:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:43,205 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:10:43,205 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:10:43,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:10:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:10:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 05:10:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:10:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 05:10:43,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2020-10-13 05:10:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 05:10:43,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:10:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 05:10:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:10:43,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:43,215 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:10:43,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:10:43,216 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-13 05:10:43,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:43,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406445083] [2020-10-13 05:10:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:43,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:43,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:43,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:44,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:46,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:48,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:48,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:10:48,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:10:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:10:48,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:10:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:10:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:48,668 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 05:10:48,915 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 05:10:49,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:49,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:49,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:49,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:10:49,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:49,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:49,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:49,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:49,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:49,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:50,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406445083] [2020-10-13 05:10:50,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:50,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:10:50,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277266726] [2020-10-13 05:10:50,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:10:50,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:10:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:10:50,016 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 21 states. [2020-10-13 05:10:50,811 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 05:10:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:51,476 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-13 05:10:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:10:51,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 05:10:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:51,482 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:10:51,482 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:10:51,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:10:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:10:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-13 05:10:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 05:10:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 05:10:51,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 37 [2020-10-13 05:10:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:51,495 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 05:10:51,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:10:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 05:10:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:10:51,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:51,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:10:51,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:10:51,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 1 times [2020-10-13 05:10:51,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:51,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219306991] [2020-10-13 05:10:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:51,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:51,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:53,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:53,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:54,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:54,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:10:54,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:10:54,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3144 [2020-10-13 05:10:54,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:10:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:10:54,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:10:54,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:10:54,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:54,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:54,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:54,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:54,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:54,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:54,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:54,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:54,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:54,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:54,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:54,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:54,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:54,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:54,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:54,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:54,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:10:54,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219306991] [2020-10-13 05:10:54,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:54,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:10:54,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351185667] [2020-10-13 05:10:54,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:10:54,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:10:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:10:54,864 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 11 states. [2020-10-13 05:10:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:55,267 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 05:10:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:10:55,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 05:10:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:55,269 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:10:55,270 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:10:55,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:10:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:10:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 05:10:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:10:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 05:10:55,279 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 37 [2020-10-13 05:10:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:55,281 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 05:10:55,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:10:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 05:10:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:10:55,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:55,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 05:10:55,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:10:55,283 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-13 05:10:55,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:55,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623240316] [2020-10-13 05:10:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:55,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:56,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:56,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:10:56,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:10:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-13 05:10:56,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:10:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:10:56,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:10:56,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:56,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:56,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:56,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:56,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:56,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:56,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:56,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:56,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:56,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:56,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:56,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:10:56,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:56,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:56,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:10:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:10:56,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623240316] [2020-10-13 05:10:56,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:56,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:10:56,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148766471] [2020-10-13 05:10:56,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:10:56,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:10:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:10:56,708 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-10-13 05:10:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:57,030 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-13 05:10:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:10:57,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 05:10:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:57,032 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:10:57,032 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:10:57,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 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 05:10:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:10:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-10-13 05:10:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:10:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 05:10:57,042 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2020-10-13 05:10:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:57,043 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 05:10:57,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:10:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 05:10:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:10:57,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:57,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-13 05:10:57,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:10:57,045 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash 890720641, now seen corresponding path program 6 times [2020-10-13 05:10:57,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:57,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751523394] [2020-10-13 05:10:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:57,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:00,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:02,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:02,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:11:02,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:11:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:11:02,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:11:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:02,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:11:02,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:02,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:02,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:02,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:02,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:02,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:02,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:02,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:02,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:02,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:11:02,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751523394] [2020-10-13 05:11:02,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:02,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:11:02,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073910826] [2020-10-13 05:11:02,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:11:02,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:11:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:11:02,347 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 16 states. [2020-10-13 05:11:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:03,834 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-13 05:11:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:11:03,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-13 05:11:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:03,837 INFO L225 Difference]: With dead ends: 100 [2020-10-13 05:11:03,838 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:11:03,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=1943, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:11:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:11:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-10-13 05:11:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:11:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 05:11:03,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 42 [2020-10-13 05:11:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:03,872 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 05:11:03,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:11:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 05:11:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:11:03,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:03,874 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:03,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:11:03,874 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 7 times [2020-10-13 05:11:03,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:03,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534948415] [2020-10-13 05:11:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:11:08,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:08,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:11:08,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:09,372 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-13 05:11:09,600 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-13 05:11:10,516 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-13 05:11:11,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:11,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:11,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:11,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:11,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:11,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:11,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:11,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:11,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:11,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:11,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:11,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:11,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:11,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:11,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534948415] [2020-10-13 05:11:11,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:11,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:11:11,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391532370] [2020-10-13 05:11:11,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:11:11,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:11:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:11:11,472 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 29 states. [2020-10-13 05:11:12,394 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-13 05:11:12,691 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-13 05:11:12,882 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-13 05:11:14,070 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-13 05:11:14,475 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 52 [2020-10-13 05:11:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:15,669 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-13 05:11:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:11:15,669 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-13 05:11:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:15,671 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:11:15,671 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:11:15,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=307, Invalid=2663, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 05:11:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:11:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-13 05:11:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:11:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-10-13 05:11:15,689 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 44 [2020-10-13 05:11:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:15,689 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-10-13 05:11:15,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:11:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-10-13 05:11:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:11:15,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:15,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 05:11:15,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:11:15,691 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1336184475, now seen corresponding path program 2 times [2020-10-13 05:11:15,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:15,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198432783] [2020-10-13 05:11:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:20,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:11:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:11:20,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:20,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:20,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:20,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:20,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:20,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:20,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:20,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:20,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 05:11:20,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198432783] [2020-10-13 05:11:20,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:20,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:11:20,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009380270] [2020-10-13 05:11:20,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:11:20,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:11:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:11:20,814 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 9 states. [2020-10-13 05:11:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:21,084 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2020-10-13 05:11:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:11:21,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-13 05:11:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:21,086 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:11:21,086 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:11:21,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:11:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-10-13 05:11:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:11:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-13 05:11:21,100 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 44 [2020-10-13 05:11:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:21,100 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-13 05:11:21,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:11:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-13 05:11:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:11:21,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:21,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:11:21,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:11:21,102 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 8 times [2020-10-13 05:11:21,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:21,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115432998] [2020-10-13 05:11:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:21,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:11:21,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-13 05:11:21,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:11:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:11:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:21,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:21,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:21,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:21,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:21,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:21,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:11:21,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115432998] [2020-10-13 05:11:21,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:21,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:11:21,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406533623] [2020-10-13 05:11:21,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:11:21,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:11:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:11:21,922 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 12 states. [2020-10-13 05:11:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:22,240 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2020-10-13 05:11:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:11:22,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:11:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:22,242 INFO L225 Difference]: With dead ends: 120 [2020-10-13 05:11:22,242 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:11:22,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:11:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:11:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-13 05:11:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 05:11:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-13 05:11:22,252 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 46 [2020-10-13 05:11:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:22,253 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-13 05:11:22,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:11:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-13 05:11:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:11:22,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:22,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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 05:11:22,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:11:22,254 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1718249991, now seen corresponding path program 3 times [2020-10-13 05:11:22,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:22,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555173805] [2020-10-13 05:11:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:22,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:25,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:11:27,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:11:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:11:27,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:11:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:11:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:11:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:27,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:27,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:27,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:11:27,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555173805] [2020-10-13 05:11:27,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:27,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:11:27,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367272959] [2020-10-13 05:11:27,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:11:27,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:11:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:11:27,651 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 15 states. [2020-10-13 05:11:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:28,528 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-13 05:11:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:11:28,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-13 05:11:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:28,529 INFO L225 Difference]: With dead ends: 71 [2020-10-13 05:11:28,529 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:11:28,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:11:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:11:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 05:11:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:11:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-13 05:11:28,550 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 47 [2020-10-13 05:11:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:28,551 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-13 05:11:28,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:11:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-13 05:11:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:11:28,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:28,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-13 05:11:28,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:11:28,554 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1566508697, now seen corresponding path program 9 times [2020-10-13 05:11:28,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:28,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052815471] [2020-10-13 05:11:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:28,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:11:33,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:11:33,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:11:33,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:33,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:33,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:33,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:11:33,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052815471] [2020-10-13 05:11:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:33,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:11:33,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292445994] [2020-10-13 05:11:33,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:11:33,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:33,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:11:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:11:33,922 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 18 states. [2020-10-13 05:11:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:35,116 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-13 05:11:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:11:35,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-13 05:11:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:35,118 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:11:35,118 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:11:35,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:11:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:11:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2020-10-13 05:11:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:11:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 05:11:35,132 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2020-10-13 05:11:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:35,133 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 05:11:35,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:11:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 05:11:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:11:35,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:35,134 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:35,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:11:35,134 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 10 times [2020-10-13 05:11:35,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:35,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457806841] [2020-10-13 05:11:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:11:40,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:11:40,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,273 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-13 05:11:42,037 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-13 05:11:43,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:43,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:43,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:43,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:43,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:43,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:43,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:43,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:43,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:43,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457806841] [2020-10-13 05:11:43,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:43,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:11:43,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560553086] [2020-10-13 05:11:43,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:11:43,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:43,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:11:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:11:43,224 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 35 states. [2020-10-13 05:11:44,306 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-13 05:11:45,439 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2020-10-13 05:11:45,661 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-13 05:11:45,899 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 05:11:46,106 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:11:46,345 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-13 05:11:46,558 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-13 05:11:47,163 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 05:11:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:48,122 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-13 05:11:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:11:48,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2020-10-13 05:11:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:48,124 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:11:48,124 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 05:11:48,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=384, Invalid=3398, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:11:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 05:11:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-10-13 05:11:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:11:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-13 05:11:48,142 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 51 [2020-10-13 05:11:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:48,142 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-13 05:11:48,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:11:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-13 05:11:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:11:48,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:48,143 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:11:48,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:11:48,143 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1972879019, now seen corresponding path program 11 times [2020-10-13 05:11:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:48,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353120433] [2020-10-13 05:11:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:11:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:11:50,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:50,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:50,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:50,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:50,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:11:50,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:50,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:50,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:50,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:50,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:50,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:50,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:11:50,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353120433] [2020-10-13 05:11:50,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:50,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:11:50,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819247599] [2020-10-13 05:11:50,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:11:50,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:11:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:50,190 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 14 states. [2020-10-13 05:11:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:50,625 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-10-13 05:11:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:11:50,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 05:11:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:50,627 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:11:50,627 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:11:50,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:11:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:11:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2020-10-13 05:11:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:11:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 05:11:50,639 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 53 [2020-10-13 05:11:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:50,639 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 05:11:50,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:11:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 05:11:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:11:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:50,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:11:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:11:50,640 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 98557899, now seen corresponding path program 12 times [2020-10-13 05:11:50,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:50,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966848385] [2020-10-13 05:11:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:50,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5173 [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:11:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:11:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:55,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:55,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:55,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:55,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:55,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:55,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:55,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:55,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:55,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:55,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:55,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:55,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:55,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:11:55,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966848385] [2020-10-13 05:11:55,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:55,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:11:55,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280327832] [2020-10-13 05:11:55,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:11:55,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:55,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:11:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:55,980 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 14 states. [2020-10-13 05:11:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:56,640 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-10-13 05:11:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:11:56,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 05:11:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:56,643 INFO L225 Difference]: With dead ends: 87 [2020-10-13 05:11:56,643 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 05:11:56,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:11:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 05:11:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-13 05:11:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:11:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 05:11:56,659 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 53 [2020-10-13 05:11:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:56,659 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 05:11:56,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:11:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 05:11:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:11:56,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:56,666 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:56,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:11:56,667 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:56,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 13 times [2020-10-13 05:11:56,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:56,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283296360] [2020-10-13 05:11:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:56,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:01,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:12:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:02,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 05:12:03,093 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 05:12:03,255 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-13 05:12:03,490 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-13 05:12:03,868 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-13 05:12:04,357 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 05:12:04,578 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 05:12:04,740 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 05:12:04,964 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-13 05:12:05,313 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-13 05:12:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:06,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:06,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:06,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283296360] [2020-10-13 05:12:06,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:06,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:12:06,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040417426] [2020-10-13 05:12:06,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:12:06,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:12:06,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:12:06,973 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 41 states. [2020-10-13 05:12:07,998 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-13 05:12:08,484 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2020-10-13 05:12:08,951 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 05:12:09,654 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 77 [2020-10-13 05:12:09,895 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-13 05:12:10,165 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-13 05:12:10,428 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-13 05:12:10,755 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-13 05:12:11,156 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-13 05:12:11,409 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 05:12:11,933 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-13 05:12:12,333 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-13 05:12:12,768 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-13 05:12:13,078 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 05:12:13,339 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-13 05:12:13,654 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-13 05:12:14,264 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 05:12:14,958 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 109 [2020-10-13 05:12:15,354 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 91 [2020-10-13 05:12:15,813 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 90 [2020-10-13 05:12:16,138 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-13 05:12:17,467 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-13 05:12:17,968 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 80 [2020-10-13 05:12:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:18,253 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-13 05:12:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:12:18,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-13 05:12:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:18,254 INFO L225 Difference]: With dead ends: 94 [2020-10-13 05:12:18,254 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 05:12:18,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=628, Invalid=5224, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:12:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 05:12:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-10-13 05:12:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:12:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-13 05:12:18,270 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-10-13 05:12:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:18,270 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-13 05:12:18,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:12:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-13 05:12:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:12:18,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:18,271 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 05:12:18,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:12:18,271 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1127356639, now seen corresponding path program 4 times [2020-10-13 05:12:18,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:18,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30174614] [2020-10-13 05:12:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:12:23,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:12:23,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:12:23,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:12:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:12:23,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:23,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:23,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:23,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:23,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:23,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:23,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 05:12:23,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30174614] [2020-10-13 05:12:23,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:23,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:12:23,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133696481] [2020-10-13 05:12:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:12:23,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:12:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:12:23,589 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 11 states. [2020-10-13 05:12:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:24,012 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-13 05:12:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:12:24,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-13 05:12:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:24,013 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:12:24,013 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:12:24,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:12:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:12:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 05:12:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:12:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-13 05:12:24,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 58 [2020-10-13 05:12:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:24,028 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-13 05:12:24,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:12:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-13 05:12:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:12:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:24,029 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 05:12:24,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:12:24,030 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1479783227, now seen corresponding path program 14 times [2020-10-13 05:12:24,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:24,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045909316] [2020-10-13 05:12:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:27,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:12:27,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:12:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:27,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:27,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:27,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:27,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:27,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:27,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:27,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:12:27,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045909316] [2020-10-13 05:12:27,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:27,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:12:27,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258616123] [2020-10-13 05:12:27,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:12:27,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:12:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:27,254 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 16 states. [2020-10-13 05:12:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:27,784 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2020-10-13 05:12:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:12:27,785 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 05:12:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:27,787 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:12:27,787 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:12:27,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:12:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:12:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-10-13 05:12:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:12:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 05:12:27,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 60 [2020-10-13 05:12:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:27,798 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 05:12:27,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:12:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 05:12:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:12:27,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:27,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2020-10-13 05:12:27,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:12:27,799 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1262096657, now seen corresponding path program 15 times [2020-10-13 05:12:27,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:27,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538576884] [2020-10-13 05:12:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:27,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:32,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:12:32,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:12:32,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:12:32,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:32,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:12:32,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:12:32,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:12:32,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:33,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:33,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:33,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:33,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:33,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:33,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:12:33,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538576884] [2020-10-13 05:12:33,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:33,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:12:33,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116648112] [2020-10-13 05:12:33,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:12:33,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:33,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:12:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:33,114 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 20 states. [2020-10-13 05:12:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:33,859 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-13 05:12:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:12:33,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-13 05:12:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:33,864 INFO L225 Difference]: With dead ends: 79 [2020-10-13 05:12:33,864 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:12:33,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:12:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:12:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-13 05:12:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:12:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:12:33,873 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 63 [2020-10-13 05:12:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:33,873 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:12:33,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:12:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:12:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:12:33,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:33,874 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:12:33,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:12:33,874 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1669572561, now seen corresponding path program 16 times [2020-10-13 05:12:33,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:33,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357004302] [2020-10-13 05:12:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:38,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:38,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:12:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:12:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:12:38,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:12:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:12:38,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:39,697 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-13 05:12:39,835 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 05:12:40,170 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-13 05:12:40,409 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-13 05:12:40,702 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2020-10-13 05:12:41,037 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-13 05:12:41,285 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-13 05:12:41,590 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 05:12:41,920 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2020-10-13 05:12:42,199 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2020-10-13 05:12:42,495 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2020-10-13 05:12:42,779 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-13 05:12:43,174 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-13 05:12:43,497 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2020-10-13 05:12:43,856 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-13 05:12:44,172 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-13 05:12:44,476 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-13 05:12:44,741 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-13 05:12:45,061 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 59 [2020-10-13 05:12:45,295 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 05:12:45,535 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-13 05:12:45,781 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-13 05:12:46,022 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-13 05:12:46,264 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-13 05:12:46,518 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-13 05:12:46,733 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-13 05:12:46,976 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-13 05:12:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:47,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:47,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:47,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:47,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:47,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:47,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:47,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:47,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:12:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357004302] [2020-10-13 05:12:47,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:47,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:12:47,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377847805] [2020-10-13 05:12:47,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:12:47,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:47,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:12:47,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:12:47,756 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 43 states. [2020-10-13 05:12:48,465 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2020-10-13 05:12:48,725 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 46 [2020-10-13 05:12:48,943 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43 [2020-10-13 05:12:49,200 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 47 [2020-10-13 05:12:49,507 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 49 [2020-10-13 05:12:49,824 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 46 [2020-10-13 05:12:50,164 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 47 [2020-10-13 05:12:50,438 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 44 [2020-10-13 05:12:50,752 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-13 05:12:50,974 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 39 [2020-10-13 05:12:51,435 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2020-10-13 05:12:51,634 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 05:12:51,859 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-13 05:12:52,156 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2020-10-13 05:12:52,418 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-13 05:12:52,749 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-13 05:12:53,028 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-13 05:12:53,335 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 05:12:53,697 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-13 05:12:53,969 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-13 05:12:54,210 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-13 05:12:54,503 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2020-10-13 05:12:54,962 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 05:12:55,279 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 49 [2020-10-13 05:12:55,752 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-13 05:12:55,999 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 05:12:56,483 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-13 05:12:56,977 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2020-10-13 05:12:57,519 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 103 [2020-10-13 05:12:58,106 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 77 [2020-10-13 05:12:58,437 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2020-10-13 05:12:58,864 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2020-10-13 05:12:59,393 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-13 05:12:59,919 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 05:13:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:00,758 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-13 05:13:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:13:00,759 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2020-10-13 05:13:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:00,759 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:13:00,760 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:13:00,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1051, Invalid=6959, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 05:13:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:13:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-13 05:13:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:13:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-13 05:13:00,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 65 [2020-10-13 05:13:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:00,774 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-13 05:13:00,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:13:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-13 05:13:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:13:00,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:00,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 05:13:00,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:13:00,775 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099471, now seen corresponding path program 5 times [2020-10-13 05:13:00,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:00,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985971686] [2020-10-13 05:13:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:00,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:05,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:05,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:13:05,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 05:13:05,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:05,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:13:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:13:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:06,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:06,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:06,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:06,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:06,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:06,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:06,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:06,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:06,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:13:06,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985971686] [2020-10-13 05:13:06,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:06,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:13:06,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151992791] [2020-10-13 05:13:06,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:13:06,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:13:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:13:06,068 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 13 states. [2020-10-13 05:13:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:06,791 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-13 05:13:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:13:06,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 05:13:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:06,793 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:13:06,793 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:13:06,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:13:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:13:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 05:13:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:13:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-13 05:13:06,805 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2020-10-13 05:13:06,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:06,805 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-13 05:13:06,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:13:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-13 05:13:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:13:06,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:06,807 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2020-10-13 05:13:06,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:13:06,807 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:06,807 INFO L82 PathProgramCache]: Analyzing trace with hash -625661757, now seen corresponding path program 17 times [2020-10-13 05:13:06,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:06,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751386438] [2020-10-13 05:13:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:06,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:06,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:09,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:09,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:10,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:13:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:12,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:12,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:12,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:12,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:12,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:12,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:12,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:12,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:12,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:13:12,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751386438] [2020-10-13 05:13:12,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:12,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:13:12,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979012395] [2020-10-13 05:13:12,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:13:12,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:13:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:13:12,119 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 18 states. [2020-10-13 05:13:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:12,720 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-10-13 05:13:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:13:12,722 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-10-13 05:13:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:12,723 INFO L225 Difference]: With dead ends: 143 [2020-10-13 05:13:12,723 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:13:12,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:13:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:13:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2020-10-13 05:13:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:13:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-13 05:13:12,736 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 68 [2020-10-13 05:13:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:12,737 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-13 05:13:12,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:13:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-13 05:13:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:13:12,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:12,738 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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] [2020-10-13 05:13:12,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:13:12,738 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash -849120895, now seen corresponding path program 18 times [2020-10-13 05:13:12,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:12,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619743676] [2020-10-13 05:13:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:17,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:13:17,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-13 05:13:17,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 05:13:17,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:17,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:13:17,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:13:17,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:13:17,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:18,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:18,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:18,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:18,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:18,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:18,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 51 proven. 55 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:13:18,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619743676] [2020-10-13 05:13:18,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:18,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:13:18,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419139148] [2020-10-13 05:13:18,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:13:18,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:13:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:13:18,011 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-10-13 05:13:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:18,819 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-13 05:13:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:13:18,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 05:13:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:18,821 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:13:18,821 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:13:18,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:13:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:13:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2020-10-13 05:13:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:13:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-13 05:13:18,833 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 70 [2020-10-13 05:13:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:18,833 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-13 05:13:18,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:13:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-13 05:13:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:13:18,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:18,834 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:13:18,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:13:18,834 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash -892678685, now seen corresponding path program 19 times [2020-10-13 05:13:18,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:18,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656863299] [2020-10-13 05:13:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:18,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:23,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 05:13:23,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:25,140 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 05:13:25,328 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-13 05:13:25,525 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-13 05:13:25,900 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 05:13:26,095 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-10-13 05:13:26,279 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-13 05:13:26,700 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:13:27,082 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-13 05:13:27,400 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-13 05:13:27,646 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-13 05:13:28,002 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-13 05:13:28,236 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 05:13:28,536 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 05:13:28,867 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-13 05:13:29,087 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-13 05:13:29,338 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-13 05:13:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:32,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:32,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:32,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:32,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:32,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656863299] [2020-10-13 05:13:32,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:32,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:13:32,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783067682] [2020-10-13 05:13:32,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:13:32,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:13:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2565, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:13:32,244 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 53 states. [2020-10-13 05:13:33,001 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 05:13:35,038 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 05:13:35,771 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 69 [2020-10-13 05:13:36,526 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-13 05:13:37,739 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 55 [2020-10-13 05:13:38,378 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 54 [2020-10-13 05:13:39,173 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 63 [2020-10-13 05:13:39,855 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 92 [2020-10-13 05:13:40,501 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 83 [2020-10-13 05:13:41,199 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2020-10-13 05:13:41,845 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 98 [2020-10-13 05:13:42,552 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-13 05:13:43,341 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-13 05:13:43,724 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 05:13:44,150 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-13 05:13:44,512 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-13 05:13:44,897 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-13 05:13:45,674 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 71 [2020-10-13 05:13:46,441 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-13 05:13:46,901 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 05:13:47,337 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 05:13:47,739 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 05:13:48,127 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 05:13:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:50,160 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2020-10-13 05:13:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 05:13:50,161 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-10-13 05:13:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:50,162 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:13:50,163 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 05:13:50,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=725, Invalid=7647, Unknown=0, NotChecked=0, Total=8372 [2020-10-13 05:13:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 05:13:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-10-13 05:13:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 05:13:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-10-13 05:13:50,187 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 72 [2020-10-13 05:13:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:50,187 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-10-13 05:13:50,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 05:13:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-10-13 05:13:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:13:50,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:50,188 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 05:13:50,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:13:50,188 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:50,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -870046431, now seen corresponding path program 6 times [2020-10-13 05:13:50,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:50,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982289612] [2020-10-13 05:13:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:50,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:50,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:50,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:50,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:51,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:55,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:13:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:13:55,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:55,812 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2020-10-13 05:13:56,115 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2020-10-13 05:13:56,490 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-13 05:13:56,869 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-13 05:13:57,292 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-13 05:13:57,618 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 05:13:57,897 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-13 05:13:58,379 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-13 05:13:58,651 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-13 05:13:58,818 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-13 05:13:58,983 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-13 05:13:59,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:59,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:59,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-13 05:13:59,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982289612] [2020-10-13 05:13:59,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:59,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:13:59,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368298296] [2020-10-13 05:13:59,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:13:59,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:13:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:13:59,469 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 26 states. [2020-10-13 05:14:00,790 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 51 [2020-10-13 05:14:01,034 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-13 05:14:01,411 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-13 05:14:02,028 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-13 05:14:02,562 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-13 05:14:02,819 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-13 05:14:03,233 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-13 05:14:03,805 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 05:14:04,440 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-13 05:14:05,559 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 05:14:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:05,832 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2020-10-13 05:14:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:14:05,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-10-13 05:14:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:05,834 INFO L225 Difference]: With dead ends: 133 [2020-10-13 05:14:05,835 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:14:05,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:14:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:14:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-10-13 05:14:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 05:14:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-13 05:14:05,854 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 72 [2020-10-13 05:14:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:05,855 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-13 05:14:05,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:14:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-13 05:14:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:14:05,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:05,855 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-10-13 05:14:05,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:14:05,856 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 197958085, now seen corresponding path program 20 times [2020-10-13 05:14:05,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:05,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499635848] [2020-10-13 05:14:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:10,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:10,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:14:10,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:14:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:11,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:11,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:11,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:11,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:11,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:14:11,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499635848] [2020-10-13 05:14:11,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:11,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:14:11,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178129758] [2020-10-13 05:14:11,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:14:11,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:14:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:14:11,226 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 20 states. [2020-10-13 05:14:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:12,178 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-10-13 05:14:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:14:12,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-13 05:14:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:12,180 INFO L225 Difference]: With dead ends: 203 [2020-10-13 05:14:12,181 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:14:12,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 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 05:14:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:14:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2020-10-13 05:14:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 05:14:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-13 05:14:12,199 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 74 [2020-10-13 05:14:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:12,199 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-13 05:14:12,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:14:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-13 05:14:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:14:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:12,200 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-10-13 05:14:12,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:14:12,200 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1215658079, now seen corresponding path program 21 times [2020-10-13 05:14:12,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:12,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426146133] [2020-10-13 05:14:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:12,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:13,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:16,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:17,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5687 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:14:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:18,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:18,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:18,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:18,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:18,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:18,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:18,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:14:18,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426146133] [2020-10-13 05:14:18,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:18,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:14:18,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940096479] [2020-10-13 05:14:18,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:14:18,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:18,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:14:18,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:14:18,235 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 20 states. [2020-10-13 05:14:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:19,551 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-10-13 05:14:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:14:19,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-13 05:14:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:19,554 INFO L225 Difference]: With dead ends: 117 [2020-10-13 05:14:19,555 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 05:14:19,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:14:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.