/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:25:17,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:25:17,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:25:17,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:25:17,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:25:17,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:25:17,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:25:17,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:25:17,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:25:17,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:25:17,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:25:17,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:25:17,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:25:17,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:25:17,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:25:17,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:25:17,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:25:17,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:25:17,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:25:17,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:25:17,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:25:17,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:25:17,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:25:17,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:25:17,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:25:17,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:25:17,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:25:17,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:25:17,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:25:17,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:25:17,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:25:17,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:25:17,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:25:17,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:25:17,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:25:17,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:25:17,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:25:17,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:25:17,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:25:17,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:25:17,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:25:17,518 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 [2020-10-14 09:25:17,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:25:17,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:25:17,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:25:17,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:25:17,560 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:25:17,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:25:17,561 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:25:17,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:25:17,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:25:17,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:25:17,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:25:17,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:25:17,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:25:17,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:25:17,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:25:17,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:25:17,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:25:17,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:25:17,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:25:17,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:25:17,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:25:17,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:25:17,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:25:17,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:25:17,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:25:17,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:25:17,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:25:17,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:25:17,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:25:17,567 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:25:17,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:25:17,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:25:17,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:25:17,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:25:17,882 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:25:17,883 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:25:17,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75b03461c/0a9278178be942e99235014efb7d594d/FLAG679897d56 [2020-10-14 09:25:18,512 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:25:18,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:25:18,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75b03461c/0a9278178be942e99235014efb7d594d/FLAG679897d56 [2020-10-14 09:25:18,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75b03461c/0a9278178be942e99235014efb7d594d [2020-10-14 09:25:18,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:25:18,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:25:18,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:25:18,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:25:18,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:25:18,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:25:18" (1/1) ... [2020-10-14 09:25:18,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f98ced9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:18, skipping insertion in model container [2020-10-14 09:25:18,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:25:18" (1/1) ... [2020-10-14 09:25:18,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:25:18,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:25:19,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:25:19,298 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:25:19,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:25:19,423 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:25:19,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19 WrapperNode [2020-10-14 09:25:19,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:25:19,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:25:19,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:25:19,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:25:19,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (1/1) ... [2020-10-14 09:25:19,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:25:19,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:25:19,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:25:19,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:25:19,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (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 [2020-10-14 09:25:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:25:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:25:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:25:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:25:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:25:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:25:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:25:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:25:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:25:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:25:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:25:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:25:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:25:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:25:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:25:20,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:25:20,409 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:25:20,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:20 BoogieIcfgContainer [2020-10-14 09:25:20,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:25:20,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:25:20,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:25:20,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:25:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:25:18" (1/3) ... [2020-10-14 09:25:20,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc9a287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:20, skipping insertion in model container [2020-10-14 09:25:20,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:25:19" (2/3) ... [2020-10-14 09:25:20,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc9a287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:25:20, skipping insertion in model container [2020-10-14 09:25:20,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:25:20" (3/3) ... [2020-10-14 09:25:20,434 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:25:20,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:25:20,462 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:25:20,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:25:20,518 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:25:20,518 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:25:20,519 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:25:20,519 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:25:20,519 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:25:20,519 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:25:20,520 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:25:20,520 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:25:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-14 09:25:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:25:20,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:20,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:20,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-14 09:25:20,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:20,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294147036] [2020-10-14 09:25:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:21,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:21,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:23,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:23,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:25:23,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:25:23,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2531 [2020-10-14 09:25:23,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:23,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:25:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:25:23,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:25:23,900 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:23,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:23,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:23,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:23,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:23,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 09:25:23,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:23,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:23,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:23,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:23,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:23,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:23,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294147036] [2020-10-14 09:25:23,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:23,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:23,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657116864] [2020-10-14 09:25:23,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:23,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:24,009 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2020-10-14 09:25:24,352 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:25:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:25,141 INFO L93 Difference]: Finished difference Result 332 states and 558 transitions. [2020-10-14 09:25:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:25,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:25:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:25,162 INFO L225 Difference]: With dead ends: 332 [2020-10-14 09:25:25,162 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 09:25:25,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 09:25:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-14 09:25:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 09:25:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 361 transitions. [2020-10-14 09:25:25,251 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 361 transitions. Word has length 66 [2020-10-14 09:25:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:25,252 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 361 transitions. [2020-10-14 09:25:25,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 361 transitions. [2020-10-14 09:25:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:25:25,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:25,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:25,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:25:25,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1367795633, now seen corresponding path program 1 times [2020-10-14 09:25:25,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:25,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175507517] [2020-10-14 09:25:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:25,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:25,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:29,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:29,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:25:29,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:25:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4197 [2020-10-14 09:25:29,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:29,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:25:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:25:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:29,776 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:29,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:29,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:25:29,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:29,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:25:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:29,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175507517] [2020-10-14 09:25:29,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:29,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:29,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099646407] [2020-10-14 09:25:29,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:29,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:29,853 INFO L87 Difference]: Start difference. First operand 229 states and 361 transitions. Second operand 4 states. [2020-10-14 09:25:30,139 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:25:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:30,908 INFO L93 Difference]: Finished difference Result 549 states and 897 transitions. [2020-10-14 09:25:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:30,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:25:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:30,919 INFO L225 Difference]: With dead ends: 549 [2020-10-14 09:25:30,919 INFO L226 Difference]: Without dead ends: 381 [2020-10-14 09:25:30,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-14 09:25:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2020-10-14 09:25:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 09:25:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 612 transitions. [2020-10-14 09:25:30,990 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 612 transitions. Word has length 68 [2020-10-14 09:25:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:30,991 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 612 transitions. [2020-10-14 09:25:30,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 612 transitions. [2020-10-14 09:25:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:25:31,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:31,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:31,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:25:31,005 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash -172135024, now seen corresponding path program 1 times [2020-10-14 09:25:31,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:31,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110083930] [2020-10-14 09:25:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:31,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:32,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:36,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:36,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:25:36,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:25:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:25:36,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:36,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:25:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:25:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:36,303 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:36,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:36,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:36,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:36,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:25:36,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:36,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:36,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110083930] [2020-10-14 09:25:36,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:36,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:36,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901484121] [2020-10-14 09:25:36,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:36,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:36,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:36,342 INFO L87 Difference]: Start difference. First operand 379 states and 612 transitions. Second operand 4 states. [2020-10-14 09:25:36,572 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:25:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:37,194 INFO L93 Difference]: Finished difference Result 975 states and 1606 transitions. [2020-10-14 09:25:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:37,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:25:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:37,201 INFO L225 Difference]: With dead ends: 975 [2020-10-14 09:25:37,201 INFO L226 Difference]: Without dead ends: 657 [2020-10-14 09:25:37,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-14 09:25:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 655. [2020-10-14 09:25:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2020-10-14 09:25:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1052 transitions. [2020-10-14 09:25:37,247 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1052 transitions. Word has length 70 [2020-10-14 09:25:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:37,248 INFO L479 AbstractCegarLoop]: Abstraction has 655 states and 1052 transitions. [2020-10-14 09:25:37,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1052 transitions. [2020-10-14 09:25:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:25:37,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:37,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:37,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:25:37,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 575795729, now seen corresponding path program 1 times [2020-10-14 09:25:37,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:37,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010255560] [2020-10-14 09:25:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:37,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:40,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:42,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:25:42,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:42,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:25:42,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:42,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:25:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:25:42,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:25:42,648 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:42,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:42,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:42,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:25:42,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:42,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:42,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:42,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010255560] [2020-10-14 09:25:42,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:42,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:42,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207351382] [2020-10-14 09:25:42,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:42,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:42,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:42,696 INFO L87 Difference]: Start difference. First operand 655 states and 1052 transitions. Second operand 5 states. [2020-10-14 09:25:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:43,669 INFO L93 Difference]: Finished difference Result 1850 states and 2991 transitions. [2020-10-14 09:25:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:43,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:25:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:43,677 INFO L225 Difference]: With dead ends: 1850 [2020-10-14 09:25:43,677 INFO L226 Difference]: Without dead ends: 1256 [2020-10-14 09:25:43,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:25:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-10-14 09:25:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1254. [2020-10-14 09:25:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2020-10-14 09:25:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2005 transitions. [2020-10-14 09:25:43,759 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2005 transitions. Word has length 72 [2020-10-14 09:25:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:43,760 INFO L479 AbstractCegarLoop]: Abstraction has 1254 states and 2005 transitions. [2020-10-14 09:25:43,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:25:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2005 transitions. [2020-10-14 09:25:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:43,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:43,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:43,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:25:43,763 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1092508768, now seen corresponding path program 1 times [2020-10-14 09:25:43,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:43,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375710715] [2020-10-14 09:25:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:48,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:48,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:48,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:25:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:25:48,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:48,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:25:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:25:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:49,051 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:49,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:49,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:49,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:49,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:49,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:49,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375710715] [2020-10-14 09:25:49,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:49,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:49,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951548496] [2020-10-14 09:25:49,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:49,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:49,158 INFO L87 Difference]: Start difference. First operand 1254 states and 2005 transitions. Second operand 4 states. [2020-10-14 09:25:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:50,218 INFO L93 Difference]: Finished difference Result 2928 states and 4745 transitions. [2020-10-14 09:25:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:25:50,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:50,231 INFO L225 Difference]: With dead ends: 2928 [2020-10-14 09:25:50,231 INFO L226 Difference]: Without dead ends: 1786 [2020-10-14 09:25:50,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2020-10-14 09:25:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1744. [2020-10-14 09:25:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2020-10-14 09:25:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2787 transitions. [2020-10-14 09:25:50,369 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2787 transitions. Word has length 73 [2020-10-14 09:25:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:50,370 INFO L479 AbstractCegarLoop]: Abstraction has 1744 states and 2787 transitions. [2020-10-14 09:25:50,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2787 transitions. [2020-10-14 09:25:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:50,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:50,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:50,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:25:50,374 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash 572101172, now seen corresponding path program 1 times [2020-10-14 09:25:50,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:50,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323879072] [2020-10-14 09:25:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:50,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:55,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:25:55,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:25:55,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:25:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 09:25:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:25:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:25:55,668 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:55,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:55,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:55,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:55,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:55,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:55,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:25:55,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:55,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:55,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:25:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:25:55,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323879072] [2020-10-14 09:25:55,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:55,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:25:55,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866025610] [2020-10-14 09:25:55,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:25:55,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:25:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:25:55,723 INFO L87 Difference]: Start difference. First operand 1744 states and 2787 transitions. Second operand 4 states. [2020-10-14 09:25:56,028 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:25:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:57,149 INFO L93 Difference]: Finished difference Result 3444 states and 5555 transitions. [2020-10-14 09:25:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:25:57,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:25:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:57,167 INFO L225 Difference]: With dead ends: 3444 [2020-10-14 09:25:57,168 INFO L226 Difference]: Without dead ends: 2350 [2020-10-14 09:25:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-10-14 09:25:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2348. [2020-10-14 09:25:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-10-14 09:25:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3753 transitions. [2020-10-14 09:25:57,367 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3753 transitions. Word has length 73 [2020-10-14 09:25:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:57,367 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 3753 transitions. [2020-10-14 09:25:57,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:25:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3753 transitions. [2020-10-14 09:25:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:57,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:57,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:25:57,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:25:57,375 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 853067612, now seen corresponding path program 1 times [2020-10-14 09:25:57,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:57,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119783840] [2020-10-14 09:25:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:59,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:02,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:02,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:02,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:02,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:26:02,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:02,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:26:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:02,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:02,606 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:02,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:02,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:26:02,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:02,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:02,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119783840] [2020-10-14 09:26:02,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:02,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:02,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344158799] [2020-10-14 09:26:02,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:02,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:02,646 INFO L87 Difference]: Start difference. First operand 2348 states and 3753 transitions. Second operand 4 states. [2020-10-14 09:26:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:03,710 INFO L93 Difference]: Finished difference Result 6954 states and 11109 transitions. [2020-10-14 09:26:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:03,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:03,741 INFO L225 Difference]: With dead ends: 6954 [2020-10-14 09:26:03,741 INFO L226 Difference]: Without dead ends: 4654 [2020-10-14 09:26:03,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2020-10-14 09:26:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 2354. [2020-10-14 09:26:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2354 states. [2020-10-14 09:26:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3761 transitions. [2020-10-14 09:26:03,973 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3761 transitions. Word has length 73 [2020-10-14 09:26:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:03,973 INFO L479 AbstractCegarLoop]: Abstraction has 2354 states and 3761 transitions. [2020-10-14 09:26:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3761 transitions. [2020-10-14 09:26:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:03,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:03,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:26:03,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 341002258, now seen corresponding path program 1 times [2020-10-14 09:26:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:03,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325873759] [2020-10-14 09:26:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:04,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:04,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:06,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:09,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:26:09,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:09,242 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:09,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:09,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:09,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:09,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:09,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:09,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:09,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:09,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:09,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:09,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:09,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:09,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325873759] [2020-10-14 09:26:09,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:09,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:09,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025924126] [2020-10-14 09:26:09,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:09,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:09,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:09,282 INFO L87 Difference]: Start difference. First operand 2354 states and 3761 transitions. Second operand 5 states. [2020-10-14 09:26:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:10,340 INFO L93 Difference]: Finished difference Result 6826 states and 10901 transitions. [2020-10-14 09:26:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:10,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:26:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:10,363 INFO L225 Difference]: With dead ends: 6826 [2020-10-14 09:26:10,364 INFO L226 Difference]: Without dead ends: 4497 [2020-10-14 09:26:10,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2020-10-14 09:26:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 4495. [2020-10-14 09:26:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2020-10-14 09:26:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 7131 transitions. [2020-10-14 09:26:10,688 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 7131 transitions. Word has length 74 [2020-10-14 09:26:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:10,688 INFO L479 AbstractCegarLoop]: Abstraction has 4495 states and 7131 transitions. [2020-10-14 09:26:10,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 7131 transitions. [2020-10-14 09:26:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:10,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:10,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:10,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:26:10,692 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:10,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2041410011, now seen corresponding path program 1 times [2020-10-14 09:26:10,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:10,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103776186] [2020-10-14 09:26:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:10,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:26:15,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:26:15,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:15,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:26:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:15,922 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:15,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:15,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:15,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:15,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:26:15,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:15,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:15,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103776186] [2020-10-14 09:26:15,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:15,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:15,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164171921] [2020-10-14 09:26:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:15,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:15,955 INFO L87 Difference]: Start difference. First operand 4495 states and 7131 transitions. Second operand 4 states. [2020-10-14 09:26:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:16,972 INFO L93 Difference]: Finished difference Result 13198 states and 20981 transitions. [2020-10-14 09:26:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:16,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:26:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:17,019 INFO L225 Difference]: With dead ends: 13198 [2020-10-14 09:26:17,019 INFO L226 Difference]: Without dead ends: 8957 [2020-10-14 09:26:17,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2020-10-14 09:26:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 4501. [2020-10-14 09:26:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2020-10-14 09:26:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 7139 transitions. [2020-10-14 09:26:17,429 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 7139 transitions. Word has length 75 [2020-10-14 09:26:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:17,429 INFO L479 AbstractCegarLoop]: Abstraction has 4501 states and 7139 transitions. [2020-10-14 09:26:17,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 7139 transitions. [2020-10-14 09:26:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:17,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:17,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:17,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:26:17,433 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 337837947, now seen corresponding path program 1 times [2020-10-14 09:26:17,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:17,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166213199] [2020-10-14 09:26:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:22,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 09:26:22,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:26:22,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:22,655 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:22,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:22,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:22,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:22,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:22,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:22,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:22,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166213199] [2020-10-14 09:26:22,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:22,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:22,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037779620] [2020-10-14 09:26:22,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:22,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:22,682 INFO L87 Difference]: Start difference. First operand 4501 states and 7139 transitions. Second operand 4 states. [2020-10-14 09:26:22,888 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:26:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:23,866 INFO L93 Difference]: Finished difference Result 8121 states and 12997 transitions. [2020-10-14 09:26:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:23,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:26:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:23,888 INFO L225 Difference]: With dead ends: 8121 [2020-10-14 09:26:23,888 INFO L226 Difference]: Without dead ends: 5931 [2020-10-14 09:26:23,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5931 states. [2020-10-14 09:26:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5931 to 5929. [2020-10-14 09:26:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5929 states. [2020-10-14 09:26:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5929 states to 5929 states and 9415 transitions. [2020-10-14 09:26:24,205 INFO L78 Accepts]: Start accepts. Automaton has 5929 states and 9415 transitions. Word has length 75 [2020-10-14 09:26:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:24,205 INFO L479 AbstractCegarLoop]: Abstraction has 5929 states and 9415 transitions. [2020-10-14 09:26:24,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5929 states and 9415 transitions. [2020-10-14 09:26:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:24,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:24,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:24,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:26:24,208 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -328601019, now seen corresponding path program 1 times [2020-10-14 09:26:24,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:24,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114646206] [2020-10-14 09:26:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:29,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:26:29,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:29,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:26:29,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:29,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:26:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:26:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:29,429 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:29,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:29,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:29,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:29,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:29,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:29,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:29,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:29,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:29,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:29,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114646206] [2020-10-14 09:26:29,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:29,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:29,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926068324] [2020-10-14 09:26:29,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:29,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:29,505 INFO L87 Difference]: Start difference. First operand 5929 states and 9415 transitions. Second operand 4 states. [2020-10-14 09:26:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:30,393 INFO L93 Difference]: Finished difference Result 13297 states and 21277 transitions. [2020-10-14 09:26:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:30,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:26:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:30,414 INFO L225 Difference]: With dead ends: 13297 [2020-10-14 09:26:30,414 INFO L226 Difference]: Without dead ends: 7755 [2020-10-14 09:26:30,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7755 states. [2020-10-14 09:26:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7755 to 7609. [2020-10-14 09:26:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7609 states. [2020-10-14 09:26:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7609 states to 7609 states and 12043 transitions. [2020-10-14 09:26:30,947 INFO L78 Accepts]: Start accepts. Automaton has 7609 states and 12043 transitions. Word has length 75 [2020-10-14 09:26:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:30,947 INFO L479 AbstractCegarLoop]: Abstraction has 7609 states and 12043 transitions. [2020-10-14 09:26:30,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7609 states and 12043 transitions. [2020-10-14 09:26:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:30,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:30,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:30,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:26:30,951 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 814109049, now seen corresponding path program 1 times [2020-10-14 09:26:30,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:30,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291064433] [2020-10-14 09:26:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:33,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:35,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:35,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:35,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:26:35,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:35,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:26:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:26:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:36,181 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:36,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:36,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:36,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:36,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:36,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:36,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291064433] [2020-10-14 09:26:36,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:36,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559150548] [2020-10-14 09:26:36,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:36,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:36,204 INFO L87 Difference]: Start difference. First operand 7609 states and 12043 transitions. Second operand 4 states. [2020-10-14 09:26:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:37,775 INFO L93 Difference]: Finished difference Result 21550 states and 34221 transitions. [2020-10-14 09:26:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:37,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 09:26:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:37,810 INFO L225 Difference]: With dead ends: 21550 [2020-10-14 09:26:37,810 INFO L226 Difference]: Without dead ends: 14336 [2020-10-14 09:26:37,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14336 states. [2020-10-14 09:26:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14336 to 14334. [2020-10-14 09:26:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2020-10-14 09:26:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 22545 transitions. [2020-10-14 09:26:38,539 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 22545 transitions. Word has length 76 [2020-10-14 09:26:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:38,539 INFO L479 AbstractCegarLoop]: Abstraction has 14334 states and 22545 transitions. [2020-10-14 09:26:38,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 22545 transitions. [2020-10-14 09:26:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:38,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:38,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:26:38,542 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -314466218, now seen corresponding path program 1 times [2020-10-14 09:26:38,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:38,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100406276] [2020-10-14 09:26:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:38,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:43,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:43,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:43,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:26:43,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:43,838 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:43,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:43,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:43,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:43,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:43,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100406276] [2020-10-14 09:26:43,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:43,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:43,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575377761] [2020-10-14 09:26:43,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:43,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:43,864 INFO L87 Difference]: Start difference. First operand 14334 states and 22545 transitions. Second operand 5 states. [2020-10-14 09:26:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:46,159 INFO L93 Difference]: Finished difference Result 40088 states and 63141 transitions. [2020-10-14 09:26:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:46,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:26:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:46,211 INFO L225 Difference]: With dead ends: 40088 [2020-10-14 09:26:46,211 INFO L226 Difference]: Without dead ends: 26036 [2020-10-14 09:26:46,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26036 states. [2020-10-14 09:26:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26036 to 26034. [2020-10-14 09:26:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26034 states. [2020-10-14 09:26:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26034 states to 26034 states and 40630 transitions. [2020-10-14 09:26:48,004 INFO L78 Accepts]: Start accepts. Automaton has 26034 states and 40630 transitions. Word has length 76 [2020-10-14 09:26:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:48,005 INFO L479 AbstractCegarLoop]: Abstraction has 26034 states and 40630 transitions. [2020-10-14 09:26:48,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26034 states and 40630 transitions. [2020-10-14 09:26:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:26:48,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:48,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:48,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:26:48,009 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2023903507, now seen corresponding path program 1 times [2020-10-14 09:26:48,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:48,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55474707] [2020-10-14 09:26:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:53,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:53,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:26:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:53,264 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:53,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:53,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:53,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:53,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:53,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55474707] [2020-10-14 09:26:53,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:53,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:53,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288062670] [2020-10-14 09:26:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:53,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:53,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:53,289 INFO L87 Difference]: Start difference. First operand 26034 states and 40630 transitions. Second operand 5 states. [2020-10-14 09:26:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:56,692 INFO L93 Difference]: Finished difference Result 53594 states and 83795 transitions. [2020-10-14 09:26:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:56,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:26:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:56,748 INFO L225 Difference]: With dead ends: 53594 [2020-10-14 09:26:56,749 INFO L226 Difference]: Without dead ends: 28295 [2020-10-14 09:26:56,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28295 states. [2020-10-14 09:26:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28295 to 26453. [2020-10-14 09:26:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26453 states. [2020-10-14 09:26:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26453 states to 26453 states and 41158 transitions. [2020-10-14 09:26:58,497 INFO L78 Accepts]: Start accepts. Automaton has 26453 states and 41158 transitions. Word has length 76 [2020-10-14 09:26:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:58,497 INFO L479 AbstractCegarLoop]: Abstraction has 26453 states and 41158 transitions. [2020-10-14 09:26:58,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26453 states and 41158 transitions. [2020-10-14 09:26:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:26:58,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:58,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:58,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:26:58,502 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1036526146, now seen corresponding path program 1 times [2020-10-14 09:26:58,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:58,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188244823] [2020-10-14 09:26:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:58,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:03,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:03,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:27:03,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 09:27:03,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:03,715 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:03,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:03,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:03,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:03,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:03,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:03,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188244823] [2020-10-14 09:27:03,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:03,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:03,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659025514] [2020-10-14 09:27:03,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:03,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:03,739 INFO L87 Difference]: Start difference. First operand 26453 states and 41158 transitions. Second operand 4 states. [2020-10-14 09:27:03,948 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:27:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:06,915 INFO L93 Difference]: Finished difference Result 49145 states and 78144 transitions. [2020-10-14 09:27:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:06,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:06,965 INFO L225 Difference]: With dead ends: 49145 [2020-10-14 09:27:06,965 INFO L226 Difference]: Without dead ends: 35187 [2020-10-14 09:27:06,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35187 states. [2020-10-14 09:27:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35187 to 35185. [2020-10-14 09:27:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35185 states. [2020-10-14 09:27:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35185 states to 35185 states and 55214 transitions. [2020-10-14 09:27:09,416 INFO L78 Accepts]: Start accepts. Automaton has 35185 states and 55214 transitions. Word has length 77 [2020-10-14 09:27:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:09,416 INFO L479 AbstractCegarLoop]: Abstraction has 35185 states and 55214 transitions. [2020-10-14 09:27:09,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35185 states and 55214 transitions. [2020-10-14 09:27:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:09,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:09,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:09,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:27:09,421 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2106237914, now seen corresponding path program 1 times [2020-10-14 09:27:09,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:09,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009973853] [2020-10-14 09:27:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:09,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:09,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:14,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:14,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:14,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:27:14,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:27:14,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:14,629 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:14,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:14,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009973853] [2020-10-14 09:27:14,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:14,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:14,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001422197] [2020-10-14 09:27:14,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:14,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:14,653 INFO L87 Difference]: Start difference. First operand 35185 states and 55214 transitions. Second operand 4 states. [2020-10-14 09:27:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:18,212 INFO L93 Difference]: Finished difference Result 80965 states and 128224 transitions. [2020-10-14 09:27:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:18,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:18,274 INFO L225 Difference]: With dead ends: 80965 [2020-10-14 09:27:18,274 INFO L226 Difference]: Without dead ends: 46655 [2020-10-14 09:27:18,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46655 states. [2020-10-14 09:27:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46655 to 45565. [2020-10-14 09:27:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45565 states. [2020-10-14 09:27:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45565 states to 45565 states and 71518 transitions. [2020-10-14 09:27:21,477 INFO L78 Accepts]: Start accepts. Automaton has 45565 states and 71518 transitions. Word has length 77 [2020-10-14 09:27:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:21,478 INFO L479 AbstractCegarLoop]: Abstraction has 45565 states and 71518 transitions. [2020-10-14 09:27:21,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 45565 states and 71518 transitions. [2020-10-14 09:27:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:21,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:21,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:21,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:27:21,482 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2119892646, now seen corresponding path program 1 times [2020-10-14 09:27:21,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:21,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062312809] [2020-10-14 09:27:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:21,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:26,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:26,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:27:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:26,762 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:26,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:26,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:26,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:26,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:26,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062312809] [2020-10-14 09:27:26,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:26,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:26,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128291763] [2020-10-14 09:27:26,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:26,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:26,787 INFO L87 Difference]: Start difference. First operand 45565 states and 71518 transitions. Second operand 4 states. [2020-10-14 09:27:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:33,423 INFO L93 Difference]: Finished difference Result 136279 states and 214039 transitions. [2020-10-14 09:27:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:33,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:33,560 INFO L225 Difference]: With dead ends: 136279 [2020-10-14 09:27:33,560 INFO L226 Difference]: Without dead ends: 91097 [2020-10-14 09:27:33,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91097 states. [2020-10-14 09:27:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91097 to 45568. [2020-10-14 09:27:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45568 states. [2020-10-14 09:27:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45568 states to 45568 states and 71522 transitions. [2020-10-14 09:27:37,220 INFO L78 Accepts]: Start accepts. Automaton has 45568 states and 71522 transitions. Word has length 77 [2020-10-14 09:27:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:37,220 INFO L479 AbstractCegarLoop]: Abstraction has 45568 states and 71522 transitions. [2020-10-14 09:27:37,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 45568 states and 71522 transitions. [2020-10-14 09:27:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:27:37,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:37,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:37,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:27:37,224 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1524245228, now seen corresponding path program 1 times [2020-10-14 09:27:37,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:37,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951590879] [2020-10-14 09:27:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:37,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:42,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:27:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:27:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:42,462 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:42,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:42,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:42,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:42,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:42,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951590879] [2020-10-14 09:27:42,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:42,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:27:42,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131250726] [2020-10-14 09:27:42,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:27:42,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:27:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:27:42,485 INFO L87 Difference]: Start difference. First operand 45568 states and 71522 transitions. Second operand 6 states. [2020-10-14 09:27:42,711 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 09:27:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:57,643 INFO L93 Difference]: Finished difference Result 251938 states and 401178 transitions. [2020-10-14 09:27:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:27:57,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-14 09:27:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:58,003 INFO L225 Difference]: With dead ends: 251938 [2020-10-14 09:27:58,003 INFO L226 Difference]: Without dead ends: 207528 [2020-10-14 09:27:58,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:27:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207528 states. [2020-10-14 09:28:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207528 to 88264. [2020-10-14 09:28:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88264 states. [2020-10-14 09:28:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88264 states to 88264 states and 137674 transitions. [2020-10-14 09:28:07,783 INFO L78 Accepts]: Start accepts. Automaton has 88264 states and 137674 transitions. Word has length 78 [2020-10-14 09:28:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:07,783 INFO L479 AbstractCegarLoop]: Abstraction has 88264 states and 137674 transitions. [2020-10-14 09:28:07,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:28:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 88264 states and 137674 transitions. [2020-10-14 09:28:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:28:07,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:07,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:07,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:28:07,786 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -68572262, now seen corresponding path program 1 times [2020-10-14 09:28:07,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:07,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643703354] [2020-10-14 09:28:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:12,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:28:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:28:12,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:28:12,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:13,012 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:28:13,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:13,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:13,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:13,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:28:13,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:13,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:13,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:13,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643703354] [2020-10-14 09:28:13,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:13,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:28:13,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560908499] [2020-10-14 09:28:13,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:28:13,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:28:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:28:13,037 INFO L87 Difference]: Start difference. First operand 88264 states and 137674 transitions. Second operand 5 states. [2020-10-14 09:28:13,254 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:28:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:33,522 INFO L93 Difference]: Finished difference Result 302878 states and 477341 transitions. [2020-10-14 09:28:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:28:33,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:28:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:33,900 INFO L225 Difference]: With dead ends: 302878 [2020-10-14 09:28:33,901 INFO L226 Difference]: Without dead ends: 215772 [2020-10-14 09:28:33,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:28:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215772 states. [2020-10-14 09:28:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215772 to 151552. [2020-10-14 09:28:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151552 states. [2020-10-14 09:28:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151552 states to 151552 states and 236586 transitions. [2020-10-14 09:28:48,933 INFO L78 Accepts]: Start accepts. Automaton has 151552 states and 236586 transitions. Word has length 79 [2020-10-14 09:28:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:48,933 INFO L479 AbstractCegarLoop]: Abstraction has 151552 states and 236586 transitions. [2020-10-14 09:28:48,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:28:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 151552 states and 236586 transitions. [2020-10-14 09:28:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:28:48,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:48,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:48,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:28:48,937 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2112174747, now seen corresponding path program 1 times [2020-10-14 09:28:48,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:48,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889382533] [2020-10-14 09:28:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:48,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:49,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:49,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:53,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:53,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:28:53,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:28:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:28:53,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:53,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:28:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:28:53,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:28:53,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:54,161 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:28:54,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:54,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889382533] [2020-10-14 09:28:54,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:54,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:28:54,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148591900] [2020-10-14 09:28:54,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:28:54,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:28:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:28:54,191 INFO L87 Difference]: Start difference. First operand 151552 states and 236586 transitions. Second operand 5 states. [2020-10-14 09:28:54,416 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170