/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:26:39,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:26:39,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:26:39,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:26:39,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:26:39,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:26:39,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:26:39,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:26:39,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:26:39,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:26:39,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:26:39,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:26:39,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:26:39,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:26:39,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:26:39,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:26:39,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:26:39,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:26:39,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:26:39,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:26:39,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:26:39,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:26:39,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:26:39,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:26:39,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:26:39,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:26:39,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:26:39,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:26:39,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:26:39,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:26:39,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:26:39,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:26:39,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:26:39,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:26:39,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:26:39,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:26:39,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:26:39,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:26:39,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:26:39,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:26:39,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:26:39,447 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 [2020-10-27 23:26:39,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:26:39,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:26:39,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:26:39,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:26:39,498 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:26:39,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:26:39,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:26:39,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:26:39,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:26:39,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:26:39,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:26:39,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:26:39,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:26:39,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:26:39,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:26:39,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:26:39,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:26:39,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:26:39,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:26:39,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:26:39,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:26:39,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:26:39,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:26:39,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:26:39,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:26:39,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:26:39,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:26:39,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:26:39,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:26:39,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:26:39,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:26:39,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:26:39,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:26:39,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:26:39,934 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:26:39,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:26:40,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1c6b14a5/efe476109d784a8ba3ace2e8dd52d8a5/FLAG9f32399cf [2020-10-27 23:26:40,795 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:26:40,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:26:40,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1c6b14a5/efe476109d784a8ba3ace2e8dd52d8a5/FLAG9f32399cf [2020-10-27 23:26:41,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a1c6b14a5/efe476109d784a8ba3ace2e8dd52d8a5 [2020-10-27 23:26:41,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:26:41,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:26:41,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:41,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:26:41,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:26:41,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53491880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41, skipping insertion in model container [2020-10-27 23:26:41,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:26:41,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:26:41,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:41,482 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:26:41,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:41,579 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:26:41,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41 WrapperNode [2020-10-27 23:26:41,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:41,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:26:41,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:26:41,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:26:41,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (1/1) ... [2020-10-27 23:26:41,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:26:41,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:26:41,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:26:41,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:26:41,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (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 [2020-10-27 23:26:41,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:26:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:26:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:26:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:26:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:26:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:26:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:26:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:26:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:26:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:26:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:26:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:26:42,729 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:26:42,731 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:26:42,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:42 BoogieIcfgContainer [2020-10-27 23:26:42,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:26:42,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:26:42,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:26:42,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:26:42,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:26:41" (1/3) ... [2020-10-27 23:26:42,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1635c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:42, skipping insertion in model container [2020-10-27 23:26:42,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:41" (2/3) ... [2020-10-27 23:26:42,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1635c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:26:42, skipping insertion in model container [2020-10-27 23:26:42,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:26:42" (3/3) ... [2020-10-27 23:26:42,744 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:26:42,757 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:26:42,763 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:26:42,776 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:26:42,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:26:42,806 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:26:42,806 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:26:42,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:26:42,806 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:26:42,807 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:26:42,807 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:26:42,807 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:26:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-10-27 23:26:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 23:26:42,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:42,842 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] [2020-10-27 23:26:42,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1542310197, now seen corresponding path program 1 times [2020-10-27 23:26:42,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:42,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342832813] [2020-10-27 23:26:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:43,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:46,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:46,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 23:26:46,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:26:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3463 [2020-10-27 23:26:46,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:46,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:26:46,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:26:46,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:26:46,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:26:47,125 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:26:47,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:47,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:47,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:47,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:26:47,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:47,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:47,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:47,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:47,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342832813] [2020-10-27 23:26:47,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:47,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:26:47,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21004461] [2020-10-27 23:26:47,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:26:47,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:26:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:26:47,206 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 6 states. [2020-10-27 23:26:47,576 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:26:48,715 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:26:48,969 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:26:49,257 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:26:49,527 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:26:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:49,624 INFO L93 Difference]: Finished difference Result 669 states and 1122 transitions. [2020-10-27 23:26:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:26:49,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-27 23:26:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:49,672 INFO L225 Difference]: With dead ends: 669 [2020-10-27 23:26:49,672 INFO L226 Difference]: Without dead ends: 562 [2020-10-27 23:26:49,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:26:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-10-27 23:26:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 223. [2020-10-27 23:26:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 23:26:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 354 transitions. [2020-10-27 23:26:49,766 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 354 transitions. Word has length 61 [2020-10-27 23:26:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:49,767 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 354 transitions. [2020-10-27 23:26:49,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:26:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 354 transitions. [2020-10-27 23:26:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 23:26:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:49,775 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] [2020-10-27 23:26:49,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:26:49,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1817753186, now seen corresponding path program 1 times [2020-10-27 23:26:49,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:49,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861345439] [2020-10-27 23:26:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:53,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 23:26:53,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:26:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3285 [2020-10-27 23:26:53,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:26:53,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:26:53,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:26:53,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 23:26:53,426 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:26:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:53,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:53,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:53,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:53,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:26:53,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:53,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:53,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861345439] [2020-10-27 23:26:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:26:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915101130] [2020-10-27 23:26:53,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:26:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:26:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:26:53,489 INFO L87 Difference]: Start difference. First operand 223 states and 354 transitions. Second operand 7 states. [2020-10-27 23:26:53,784 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:26:54,693 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:26:54,941 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:26:55,190 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:26:55,497 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:26:55,766 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:26:56,245 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:26:56,581 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:26:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:56,595 INFO L93 Difference]: Finished difference Result 1387 states and 2295 transitions. [2020-10-27 23:26:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:26:56,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-27 23:26:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:56,603 INFO L225 Difference]: With dead ends: 1387 [2020-10-27 23:26:56,604 INFO L226 Difference]: Without dead ends: 1222 [2020-10-27 23:26:56,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:26:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-10-27 23:26:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 646. [2020-10-27 23:26:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-10-27 23:26:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1063 transitions. [2020-10-27 23:26:56,710 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1063 transitions. Word has length 62 [2020-10-27 23:26:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:56,710 INFO L481 AbstractCegarLoop]: Abstraction has 646 states and 1063 transitions. [2020-10-27 23:26:56,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:26:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1063 transitions. [2020-10-27 23:26:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 23:26:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:56,720 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] [2020-10-27 23:26:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:26:56,723 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:56,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1253165628, now seen corresponding path program 1 times [2020-10-27 23:26:56,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:56,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424381320] [2020-10-27 23:26:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:56,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:56,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:56,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:57,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:59,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 23:26:59,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:26:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2654 [2020-10-27 23:26:59,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:59,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:59,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:26:59,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:26:59,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:26:59,736 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:26:59,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:59,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:59,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:59,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:26:59,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:26:59,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424381320] [2020-10-27 23:26:59,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:59,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:59,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879125563] [2020-10-27 23:26:59,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:59,787 INFO L87 Difference]: Start difference. First operand 646 states and 1063 transitions. Second operand 5 states. [2020-10-27 23:27:00,078 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:00,812 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:27:00,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:00,932 INFO L93 Difference]: Finished difference Result 2264 states and 3775 transitions. [2020-10-27 23:27:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:27:00,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 23:27:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:00,945 INFO L225 Difference]: With dead ends: 2264 [2020-10-27 23:27:00,945 INFO L226 Difference]: Without dead ends: 1728 [2020-10-27 23:27:00,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:27:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2020-10-27 23:27:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1182. [2020-10-27 23:27:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2020-10-27 23:27:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1959 transitions. [2020-10-27 23:27:01,090 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1959 transitions. Word has length 63 [2020-10-27 23:27:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:01,090 INFO L481 AbstractCegarLoop]: Abstraction has 1182 states and 1959 transitions. [2020-10-27 23:27:01,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1959 transitions. [2020-10-27 23:27:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:27:01,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:01,097 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] [2020-10-27 23:27:01,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:27:01,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1821069637, now seen corresponding path program 1 times [2020-10-27 23:27:01,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:01,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080415171] [2020-10-27 23:27:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:03,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:27:03,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:27:03,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-27 23:27:03,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:03,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:03,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 23:27:03,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:27:03,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:03,721 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:03,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:03,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080415171] [2020-10-27 23:27:03,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:03,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:03,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582410896] [2020-10-27 23:27:03,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:03,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:03,775 INFO L87 Difference]: Start difference. First operand 1182 states and 1959 transitions. Second operand 5 states. [2020-10-27 23:27:04,025 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:04,864 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:27:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:05,049 INFO L93 Difference]: Finished difference Result 4368 states and 7287 transitions. [2020-10-27 23:27:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:27:05,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 23:27:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:05,067 INFO L225 Difference]: With dead ends: 4368 [2020-10-27 23:27:05,067 INFO L226 Difference]: Without dead ends: 3306 [2020-10-27 23:27:05,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:27:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-10-27 23:27:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2227. [2020-10-27 23:27:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-10-27 23:27:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 3697 transitions. [2020-10-27 23:27:05,252 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 3697 transitions. Word has length 64 [2020-10-27 23:27:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:05,252 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 3697 transitions. [2020-10-27 23:27:05,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 3697 transitions. [2020-10-27 23:27:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:05,254 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] [2020-10-27 23:27:05,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:27:05,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash -611199258, now seen corresponding path program 1 times [2020-10-27 23:27:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:05,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573856807] [2020-10-27 23:27:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:05,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:10,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:10,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:27:10,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:10,573 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:10,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:10,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:10,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:10,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:27:10,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:10,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:10,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:10,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573856807] [2020-10-27 23:27:10,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:10,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:10,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108474835] [2020-10-27 23:27:10,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:10,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:10,667 INFO L87 Difference]: Start difference. First operand 2227 states and 3697 transitions. Second operand 5 states. [2020-10-27 23:27:11,792 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:27:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:12,116 INFO L93 Difference]: Finished difference Result 6153 states and 10221 transitions. [2020-10-27 23:27:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:27:12,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 23:27:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:12,139 INFO L225 Difference]: With dead ends: 6153 [2020-10-27 23:27:12,140 INFO L226 Difference]: Without dead ends: 4046 [2020-10-27 23:27:12,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:27:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2020-10-27 23:27:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3987. [2020-10-27 23:27:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3987 states. [2020-10-27 23:27:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6524 transitions. [2020-10-27 23:27:12,466 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6524 transitions. Word has length 66 [2020-10-27 23:27:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:12,467 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 6524 transitions. [2020-10-27 23:27:12,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6524 transitions. [2020-10-27 23:27:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:12,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:12,469 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] [2020-10-27 23:27:12,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:27:12,470 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:12,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1983725519, now seen corresponding path program 1 times [2020-10-27 23:27:12,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:12,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80408371] [2020-10-27 23:27:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:17,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:17,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:17,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:27:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:17,818 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:17,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:17,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:17,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:17,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:27:17,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80408371] [2020-10-27 23:27:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165237793] [2020-10-27 23:27:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:17,866 INFO L87 Difference]: Start difference. First operand 3987 states and 6524 transitions. Second operand 4 states. [2020-10-27 23:27:18,114 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:19,377 INFO L93 Difference]: Finished difference Result 10838 states and 17792 transitions. [2020-10-27 23:27:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:19,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:27:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:19,416 INFO L225 Difference]: With dead ends: 10838 [2020-10-27 23:27:19,416 INFO L226 Difference]: Without dead ends: 6922 [2020-10-27 23:27:19,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2020-10-27 23:27:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 6919. [2020-10-27 23:27:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6919 states. [2020-10-27 23:27:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6919 states to 6919 states and 11306 transitions. [2020-10-27 23:27:19,943 INFO L78 Accepts]: Start accepts. Automaton has 6919 states and 11306 transitions. Word has length 66 [2020-10-27 23:27:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:19,944 INFO L481 AbstractCegarLoop]: Abstraction has 6919 states and 11306 transitions. [2020-10-27 23:27:19,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6919 states and 11306 transitions. [2020-10-27 23:27:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:19,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:19,946 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] [2020-10-27 23:27:19,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:27:19,947 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -449009260, now seen corresponding path program 1 times [2020-10-27 23:27:19,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:19,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259925739] [2020-10-27 23:27:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:21,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:24,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:27:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:25,297 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:25,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:25,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:25,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:27:25,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:27:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:25,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259925739] [2020-10-27 23:27:25,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808340354] [2020-10-27 23:27:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:25,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:25,352 INFO L87 Difference]: Start difference. First operand 6919 states and 11306 transitions. Second operand 5 states. [2020-10-27 23:27:26,438 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:27:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:27,318 INFO L93 Difference]: Finished difference Result 19496 states and 31839 transitions. [2020-10-27 23:27:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:27:27,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 23:27:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:27,375 INFO L225 Difference]: With dead ends: 19496 [2020-10-27 23:27:27,375 INFO L226 Difference]: Without dead ends: 12678 [2020-10-27 23:27:27,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:27:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2020-10-27 23:27:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 12451. [2020-10-27 23:27:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12451 states. [2020-10-27 23:27:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 20118 transitions. [2020-10-27 23:27:28,410 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 20118 transitions. Word has length 66 [2020-10-27 23:27:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:28,410 INFO L481 AbstractCegarLoop]: Abstraction has 12451 states and 20118 transitions. [2020-10-27 23:27:28,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 20118 transitions. [2020-10-27 23:27:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:28,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:28,411 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] [2020-10-27 23:27:28,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:27:28,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1518766264, now seen corresponding path program 1 times [2020-10-27 23:27:28,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:28,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670316950] [2020-10-27 23:27:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:28,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:28,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:33,685 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:33,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:33,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:33,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:27:33,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:33,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:33,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670316950] [2020-10-27 23:27:33,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:33,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487878282] [2020-10-27 23:27:33,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:33,724 INFO L87 Difference]: Start difference. First operand 12451 states and 20118 transitions. Second operand 4 states. [2020-10-27 23:27:33,953 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:35,649 INFO L93 Difference]: Finished difference Result 33802 states and 54715 transitions. [2020-10-27 23:27:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:35,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:27:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:35,706 INFO L225 Difference]: With dead ends: 33802 [2020-10-27 23:27:35,706 INFO L226 Difference]: Without dead ends: 21435 [2020-10-27 23:27:35,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21435 states. [2020-10-27 23:27:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21435 to 21432. [2020-10-27 23:27:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21432 states. [2020-10-27 23:27:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21432 states to 21432 states and 34487 transitions. [2020-10-27 23:27:37,007 INFO L78 Accepts]: Start accepts. Automaton has 21432 states and 34487 transitions. Word has length 66 [2020-10-27 23:27:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:37,008 INFO L481 AbstractCegarLoop]: Abstraction has 21432 states and 34487 transitions. [2020-10-27 23:27:37,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 21432 states and 34487 transitions. [2020-10-27 23:27:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:37,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:37,014 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] [2020-10-27 23:27:37,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:27:37,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -940340021, now seen corresponding path program 1 times [2020-10-27 23:27:37,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:37,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616795226] [2020-10-27 23:27:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:38,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 23:27:38,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:38,304 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:38,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:38,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:38,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616795226] [2020-10-27 23:27:38,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:38,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878046207] [2020-10-27 23:27:38,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:38,333 INFO L87 Difference]: Start difference. First operand 21432 states and 34487 transitions. Second operand 4 states. [2020-10-27 23:27:39,014 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:27:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:40,572 INFO L93 Difference]: Finished difference Result 49769 states and 79917 transitions. [2020-10-27 23:27:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:40,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:27:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:40,650 INFO L225 Difference]: With dead ends: 49769 [2020-10-27 23:27:40,651 INFO L226 Difference]: Without dead ends: 28430 [2020-10-27 23:27:40,703 INFO L677 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 [2020-10-27 23:27:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28430 states. [2020-10-27 23:27:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28430 to 21071. [2020-10-27 23:27:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21071 states. [2020-10-27 23:27:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21071 states to 21071 states and 33757 transitions. [2020-10-27 23:27:42,614 INFO L78 Accepts]: Start accepts. Automaton has 21071 states and 33757 transitions. Word has length 66 [2020-10-27 23:27:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:42,614 INFO L481 AbstractCegarLoop]: Abstraction has 21071 states and 33757 transitions. [2020-10-27 23:27:42,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21071 states and 33757 transitions. [2020-10-27 23:27:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:27:42,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:42,615 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] [2020-10-27 23:27:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:27:42,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1079588821, now seen corresponding path program 1 times [2020-10-27 23:27:42,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:42,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538896483] [2020-10-27 23:27:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:42,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:42,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 23:27:47,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 23:27:47,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:47,876 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:47,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:47,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:47,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:47,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:47,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:27:47,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:47,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:47,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538896483] [2020-10-27 23:27:47,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:47,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32629279] [2020-10-27 23:27:47,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:47,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:47,907 INFO L87 Difference]: Start difference. First operand 21071 states and 33757 transitions. Second operand 4 states. [2020-10-27 23:27:48,173 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:50,473 INFO L93 Difference]: Finished difference Result 53797 states and 85697 transitions. [2020-10-27 23:27:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:50,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:27:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:50,546 INFO L225 Difference]: With dead ends: 53797 [2020-10-27 23:27:50,546 INFO L226 Difference]: Without dead ends: 32826 [2020-10-27 23:27:50,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32826 states. [2020-10-27 23:27:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32826 to 32781. [2020-10-27 23:27:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32781 states. [2020-10-27 23:27:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32781 states to 32781 states and 51566 transitions. [2020-10-27 23:27:52,724 INFO L78 Accepts]: Start accepts. Automaton has 32781 states and 51566 transitions. Word has length 66 [2020-10-27 23:27:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:52,724 INFO L481 AbstractCegarLoop]: Abstraction has 32781 states and 51566 transitions. [2020-10-27 23:27:52,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:27:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 32781 states and 51566 transitions. [2020-10-27 23:27:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:27:52,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:52,725 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] [2020-10-27 23:27:52,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:27:52,725 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1087266226, now seen corresponding path program 1 times [2020-10-27 23:27:52,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:52,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285319162] [2020-10-27 23:27:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:52,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:27:53,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:27:53,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:53,960 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:27:53,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:53,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:53,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:53,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:53,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:27:53,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285319162] [2020-10-27 23:27:53,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:53,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375334992] [2020-10-27 23:27:53,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:53,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:53,998 INFO L87 Difference]: Start difference. First operand 32781 states and 51566 transitions. Second operand 4 states. [2020-10-27 23:27:54,264 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:27:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:57,395 INFO L93 Difference]: Finished difference Result 74569 states and 117161 transitions. [2020-10-27 23:27:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:27:57,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 23:27:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:57,459 INFO L225 Difference]: With dead ends: 74569 [2020-10-27 23:27:57,459 INFO L226 Difference]: Without dead ends: 41846 [2020-10-27 23:27:57,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41846 states. [2020-10-27 23:28:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41846 to 41619. [2020-10-27 23:28:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41619 states. [2020-10-27 23:28:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41619 states to 41619 states and 64997 transitions. [2020-10-27 23:28:00,085 INFO L78 Accepts]: Start accepts. Automaton has 41619 states and 64997 transitions. Word has length 67 [2020-10-27 23:28:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:00,086 INFO L481 AbstractCegarLoop]: Abstraction has 41619 states and 64997 transitions. [2020-10-27 23:28:00,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41619 states and 64997 transitions. [2020-10-27 23:28:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:28:00,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:00,087 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] [2020-10-27 23:28:00,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:28:00,087 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash -620396507, now seen corresponding path program 1 times [2020-10-27 23:28:00,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:00,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096054457] [2020-10-27 23:28:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:00,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:01,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:01,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:28:01,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:28:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1721 [2020-10-27 23:28:01,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:28:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:28:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:02,069 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:28:02,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:02,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:02,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:02,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:02,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096054457] [2020-10-27 23:28:02,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:02,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:02,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186019122] [2020-10-27 23:28:02,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:02,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:02,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:02,102 INFO L87 Difference]: Start difference. First operand 41619 states and 64997 transitions. Second operand 4 states. [2020-10-27 23:28:02,348 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:28:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:05,441 INFO L93 Difference]: Finished difference Result 89262 states and 139433 transitions. [2020-10-27 23:28:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:05,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 23:28:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:05,515 INFO L225 Difference]: With dead ends: 89262 [2020-10-27 23:28:05,515 INFO L226 Difference]: Without dead ends: 47739 [2020-10-27 23:28:05,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47739 states. [2020-10-27 23:28:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47739 to 47596. [2020-10-27 23:28:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47596 states. [2020-10-27 23:28:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47596 states to 47596 states and 74147 transitions. [2020-10-27 23:28:09,069 INFO L78 Accepts]: Start accepts. Automaton has 47596 states and 74147 transitions. Word has length 69 [2020-10-27 23:28:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:09,069 INFO L481 AbstractCegarLoop]: Abstraction has 47596 states and 74147 transitions. [2020-10-27 23:28:09,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47596 states and 74147 transitions. [2020-10-27 23:28:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:28:09,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:09,077 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] [2020-10-27 23:28:09,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:28:09,077 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1682456046, now seen corresponding path program 1 times [2020-10-27 23:28:09,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:09,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612479691] [2020-10-27 23:28:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:09,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2932 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 23:28:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:28:12,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:12,267 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:28:12,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:12,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:12,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:12,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:12,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612479691] [2020-10-27 23:28:12,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:12,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:12,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451810222] [2020-10-27 23:28:12,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:12,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:12,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:12,298 INFO L87 Difference]: Start difference. First operand 47596 states and 74147 transitions. Second operand 4 states. [2020-10-27 23:28:12,551 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:28:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:15,875 INFO L93 Difference]: Finished difference Result 101416 states and 158279 transitions. [2020-10-27 23:28:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:15,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 23:28:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:15,945 INFO L225 Difference]: With dead ends: 101416 [2020-10-27 23:28:15,945 INFO L226 Difference]: Without dead ends: 53905 [2020-10-27 23:28:15,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53905 states. [2020-10-27 23:28:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53905 to 53767. [2020-10-27 23:28:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53767 states. [2020-10-27 23:28:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53767 states to 53767 states and 83480 transitions. [2020-10-27 23:28:19,477 INFO L78 Accepts]: Start accepts. Automaton has 53767 states and 83480 transitions. Word has length 71 [2020-10-27 23:28:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:19,477 INFO L481 AbstractCegarLoop]: Abstraction has 53767 states and 83480 transitions. [2020-10-27 23:28:19,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 53767 states and 83480 transitions. [2020-10-27 23:28:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:28:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:19,478 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] [2020-10-27 23:28:19,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:28:19,478 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1809491112, now seen corresponding path program 1 times [2020-10-27 23:28:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:19,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801130221] [2020-10-27 23:28:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:19,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:19,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:19,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:19,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:20,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:28:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:24,991 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:28:24,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:25,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:25,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:25,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801130221] [2020-10-27 23:28:25,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:25,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:28:25,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794174836] [2020-10-27 23:28:25,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:28:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:28:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:28:25,030 INFO L87 Difference]: Start difference. First operand 53767 states and 83480 transitions. Second operand 6 states. [2020-10-27 23:28:25,345 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:28:26,265 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:28:26,520 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:28:27,002 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:28:29,779 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:28:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:33,082 INFO L93 Difference]: Finished difference Result 156957 states and 244129 transitions. [2020-10-27 23:28:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:28:33,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 23:28:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:33,236 INFO L225 Difference]: With dead ends: 156957 [2020-10-27 23:28:33,237 INFO L226 Difference]: Without dead ends: 103275 [2020-10-27 23:28:33,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:28:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103275 states. [2020-10-27 23:28:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103275 to 53767. [2020-10-27 23:28:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53767 states. [2020-10-27 23:28:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53767 states to 53767 states and 83225 transitions. [2020-10-27 23:28:37,789 INFO L78 Accepts]: Start accepts. Automaton has 53767 states and 83225 transitions. Word has length 72 [2020-10-27 23:28:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:37,789 INFO L481 AbstractCegarLoop]: Abstraction has 53767 states and 83225 transitions. [2020-10-27 23:28:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:28:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 53767 states and 83225 transitions. [2020-10-27 23:28:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 23:28:37,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:37,791 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] [2020-10-27 23:28:37,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:28:37,791 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash 162913414, now seen corresponding path program 1 times [2020-10-27 23:28:37,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:37,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572060835] [2020-10-27 23:28:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:37,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:42,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:28:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:43,082 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:28:43,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:43,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572060835] [2020-10-27 23:28:43,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:43,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:28:43,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129417783] [2020-10-27 23:28:43,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:28:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:43,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:28:43,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:43,114 INFO L87 Difference]: Start difference. First operand 53767 states and 83225 transitions. Second operand 5 states. [2020-10-27 23:28:43,935 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:28:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:51,795 INFO L93 Difference]: Finished difference Result 158852 states and 245692 transitions. [2020-10-27 23:28:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:28:51,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 23:28:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:51,944 INFO L225 Difference]: With dead ends: 158852 [2020-10-27 23:28:51,944 INFO L226 Difference]: Without dead ends: 105098 [2020-10-27 23:28:51,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:28:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105098 states. [2020-10-27 23:28:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105098 to 105095. [2020-10-27 23:28:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105095 states. [2020-10-27 23:29:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105095 states to 105095 states and 161409 transitions. [2020-10-27 23:29:00,134 INFO L78 Accepts]: Start accepts. Automaton has 105095 states and 161409 transitions. Word has length 75 [2020-10-27 23:29:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:00,134 INFO L481 AbstractCegarLoop]: Abstraction has 105095 states and 161409 transitions. [2020-10-27 23:29:00,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:29:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 105095 states and 161409 transitions. [2020-10-27 23:29:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 23:29:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:00,135 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] [2020-10-27 23:29:00,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:29:00,135 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1253302357, now seen corresponding path program 1 times [2020-10-27 23:29:00,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:00,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89665736] [2020-10-27 23:29:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:00,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:00,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:04,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:05,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:29:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:05,434 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:29:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:05,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:05,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:05,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89665736] [2020-10-27 23:29:05,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:05,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:29:05,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34992881] [2020-10-27 23:29:05,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:29:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:29:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:29:05,478 INFO L87 Difference]: Start difference. First operand 105095 states and 161409 transitions. Second operand 6 states. [2020-10-27 23:29:05,783 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 23:29:06,776 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:29:07,072 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:29:07,633 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:29:18,500 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:29:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:38,030 INFO L93 Difference]: Finished difference Result 481199 states and 741660 transitions. [2020-10-27 23:29:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:29:38,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-27 23:29:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:38,907 INFO L225 Difference]: With dead ends: 481199 [2020-10-27 23:29:38,907 INFO L226 Difference]: Without dead ends: 376260 [2020-10-27 23:29:39,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:29:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376260 states. [2020-10-27 23:29:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376260 to 196167. [2020-10-27 23:29:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196167 states. [2020-10-27 23:29:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196167 states to 196167 states and 300189 transitions. [2020-10-27 23:29:57,969 INFO L78 Accepts]: Start accepts. Automaton has 196167 states and 300189 transitions. Word has length 76 [2020-10-27 23:29:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:57,969 INFO L481 AbstractCegarLoop]: Abstraction has 196167 states and 300189 transitions. [2020-10-27 23:29:57,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:29:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 196167 states and 300189 transitions. [2020-10-27 23:29:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 23:29:57,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:57,971 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] [2020-10-27 23:29:57,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:29:57,972 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 138165228, now seen corresponding path program 1 times [2020-10-27 23:29:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:57,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968368283] [2020-10-27 23:29:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:03,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 23:30:03,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:30:03,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:30:03,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:30:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 23:30:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:30:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:03,278 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:30:03,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:03,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:03,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:03,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968368283] [2020-10-27 23:30:03,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:03,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:30:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849695834] [2020-10-27 23:30:03,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:30:03,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:30:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:03,304 INFO L87 Difference]: Start difference. First operand 196167 states and 300189 transitions. Second operand 5 states.