/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:56:23,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:56:23,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:56:23,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:56:23,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:56:23,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:56:23,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:56:23,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:56:23,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:56:23,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:56:23,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:56:23,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:56:23,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:56:23,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:56:23,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:56:23,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:56:23,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:56:23,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:56:23,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:56:23,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:56:23,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:56:23,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:56:23,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:56:23,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:56:23,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:56:23,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:56:23,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:56:23,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:56:23,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:56:23,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:56:23,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:56:23,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:56:23,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:56:23,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:56:23,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:56:23,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:56:23,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:56:23,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:56:23,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:56:23,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:56:23,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:56:23,434 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 [2020-10-29 13:56:23,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:56:23,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:56:23,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:56:23,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:56:23,491 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:56:23,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:56:23,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:56:23,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:56:23,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:56:23,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:56:23,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:56:23,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:56:23,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:56:23,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:56:23,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:56:23,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:56:23,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:56:23,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:56:23,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:56:23,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:56:23,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:56:23,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:56:23,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:56:23,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:56:23,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:56:23,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:56:23,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:56:23,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:56:23,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:56:23,976 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:56:23,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:56:24,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d368f42/793afd2628534b65bccb3e296cfa6c62/FLAG383f4f36c [2020-10-29 13:56:24,701 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:56:24,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:56:24,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d368f42/793afd2628534b65bccb3e296cfa6c62/FLAG383f4f36c [2020-10-29 13:56:24,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d368f42/793afd2628534b65bccb3e296cfa6c62 [2020-10-29 13:56:24,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:56:24,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:56:24,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:56:24,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:56:24,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:56:24,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:56:24" (1/1) ... [2020-10-29 13:56:24,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d52ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:24, skipping insertion in model container [2020-10-29 13:56:24,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:56:24" (1/1) ... [2020-10-29 13:56:25,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:56:25,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:56:25,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:56:25,435 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:56:25,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:56:25,641 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:56:25,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25 WrapperNode [2020-10-29 13:56:25,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:56:25,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:56:25,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:56:25,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:56:25,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (1/1) ... [2020-10-29 13:56:25,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:56:25,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:56:25,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:56:25,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:56:25,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (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 [2020-10-29 13:56:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:56:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:56:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:56:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:56:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:56:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:56:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:56:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:56:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:56:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:56:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:56:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:56:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:56:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:56:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:56:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:56:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:56:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:56:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:56:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:56:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:56:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:56:26,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:56:26,782 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:56:26,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:56:26 BoogieIcfgContainer [2020-10-29 13:56:26,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:56:26,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:56:26,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:56:26,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:56:26,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:56:24" (1/3) ... [2020-10-29 13:56:26,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe82908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:56:26, skipping insertion in model container [2020-10-29 13:56:26,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:56:25" (2/3) ... [2020-10-29 13:56:26,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe82908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:56:26, skipping insertion in model container [2020-10-29 13:56:26,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:56:26" (3/3) ... [2020-10-29 13:56:26,794 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:56:26,806 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:56:26,811 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:56:26,825 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:56:26,854 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:56:26,854 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:56:26,854 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:56:26,854 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:56:26,854 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:56:26,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:56:26,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:56:26,855 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:56:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-10-29 13:56:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:56:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:26,889 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] [2020-10-29 13:56:26,889 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1445642755, now seen corresponding path program 1 times [2020-10-29 13:56:26,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:26,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138312141] [2020-10-29 13:56:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:27,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:27,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:31,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:31,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:56:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:56:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3927 [2020-10-29 13:56:31,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:31,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:56:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:56:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:56:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 13:56:31,695 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:31,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:31,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:31,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:31,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:31,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:56:31,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:31,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:31,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:56:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:31,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138312141] [2020-10-29 13:56:31,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:31,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:56:31,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645550210] [2020-10-29 13:56:31,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:56:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:56:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:56:31,834 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-10-29 13:56:32,309 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:56:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:33,141 INFO L93 Difference]: Finished difference Result 330 states and 550 transitions. [2020-10-29 13:56:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:56:33,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-29 13:56:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:33,156 INFO L225 Difference]: With dead ends: 330 [2020-10-29 13:56:33,156 INFO L226 Difference]: Without dead ends: 225 [2020-10-29 13:56:33,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-29 13:56:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-29 13:56:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-29 13:56:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 348 transitions. [2020-10-29 13:56:33,249 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 348 transitions. Word has length 61 [2020-10-29 13:56:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:33,250 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 348 transitions. [2020-10-29 13:56:33,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:56:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 348 transitions. [2020-10-29 13:56:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:56:33,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:33,257 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] [2020-10-29 13:56:33,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:56:33,258 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1821419068, now seen corresponding path program 1 times [2020-10-29 13:56:33,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:33,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014053265] [2020-10-29 13:56:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:33,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:38,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:38,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:56:38,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:56:38,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4901 [2020-10-29 13:56:38,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:38,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:56:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:56:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:56:38,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 13:56:38,646 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:38,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:38,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:38,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:38,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:38,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:38,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014053265] [2020-10-29 13:56:38,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:38,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:56:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615381993] [2020-10-29 13:56:38,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:56:38,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:56:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:38,729 INFO L87 Difference]: Start difference. First operand 222 states and 348 transitions. Second operand 5 states. [2020-10-29 13:56:39,880 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:56:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:40,055 INFO L93 Difference]: Finished difference Result 624 states and 979 transitions. [2020-10-29 13:56:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:56:40,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-29 13:56:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:40,069 INFO L225 Difference]: With dead ends: 624 [2020-10-29 13:56:40,069 INFO L226 Difference]: Without dead ends: 423 [2020-10-29 13:56:40,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:56:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-29 13:56:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 420. [2020-10-29 13:56:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-29 13:56:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 657 transitions. [2020-10-29 13:56:40,192 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 657 transitions. Word has length 63 [2020-10-29 13:56:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:40,193 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 657 transitions. [2020-10-29 13:56:40,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:56:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 657 transitions. [2020-10-29 13:56:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:56:40,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:40,201 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] [2020-10-29 13:56:40,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:56:40,201 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2067872150, now seen corresponding path program 1 times [2020-10-29 13:56:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:40,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788443202] [2020-10-29 13:56:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:40,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:43,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:45,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:45,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:56:45,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:56:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:56:45,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:45,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:56:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:56:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:56:45,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:56:45,586 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:56:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:45,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788443202] [2020-10-29 13:56:45,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:45,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:56:45,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765354690] [2020-10-29 13:56:45,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:56:45,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:45,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:56:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:56:45,634 INFO L87 Difference]: Start difference. First operand 420 states and 657 transitions. Second operand 4 states. [2020-10-29 13:56:45,917 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:56:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:46,616 INFO L93 Difference]: Finished difference Result 1028 states and 1655 transitions. [2020-10-29 13:56:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:56:46,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-29 13:56:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:46,623 INFO L225 Difference]: With dead ends: 1028 [2020-10-29 13:56:46,623 INFO L226 Difference]: Without dead ends: 709 [2020-10-29 13:56:46,626 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 [2020-10-29 13:56:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-29 13:56:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 706. [2020-10-29 13:56:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-10-29 13:56:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1125 transitions. [2020-10-29 13:56:46,695 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1125 transitions. Word has length 64 [2020-10-29 13:56:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:46,696 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1125 transitions. [2020-10-29 13:56:46,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:56:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1125 transitions. [2020-10-29 13:56:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:56:46,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:46,699 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] [2020-10-29 13:56:46,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:56:46,699 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:46,700 INFO L82 PathProgramCache]: Analyzing trace with hash -978880747, now seen corresponding path program 1 times [2020-10-29 13:56:46,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:46,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41247187] [2020-10-29 13:56:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:46,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:46,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:49,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:51,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:51,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:56:51,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:56:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:56:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:51,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:56:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:56:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:56:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:52,133 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:52,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:52,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:52,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:52,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:56:52,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:52,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:52,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:52,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41247187] [2020-10-29 13:56:52,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:52,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:56:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584558763] [2020-10-29 13:56:52,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:56:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:56:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:52,183 INFO L87 Difference]: Start difference. First operand 706 states and 1125 transitions. Second operand 5 states. [2020-10-29 13:56:53,311 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:56:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:53,472 INFO L93 Difference]: Finished difference Result 2006 states and 3193 transitions. [2020-10-29 13:56:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:56:53,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-29 13:56:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:53,482 INFO L225 Difference]: With dead ends: 2006 [2020-10-29 13:56:53,482 INFO L226 Difference]: Without dead ends: 1341 [2020-10-29 13:56:53,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:56:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-10-29 13:56:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1338. [2020-10-29 13:56:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1338 states. [2020-10-29 13:56:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2119 transitions. [2020-10-29 13:56:53,613 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2119 transitions. Word has length 66 [2020-10-29 13:56:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:53,614 INFO L481 AbstractCegarLoop]: Abstraction has 1338 states and 2119 transitions. [2020-10-29 13:56:53,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:56:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2119 transitions. [2020-10-29 13:56:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:56:53,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:53,617 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] [2020-10-29 13:56:53,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:56:53,618 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:53,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1844671571, now seen corresponding path program 1 times [2020-10-29 13:56:53,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:53,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686236619] [2020-10-29 13:56:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:53,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:53,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:53,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:58,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:58,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:56:58,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:56:58,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:56:58,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:58,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:56:58,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:56:58,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:56:58,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:59,008 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:59,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:59,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:59,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:59,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:59,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:59,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:56:59,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:59,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:59,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:59,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:59,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:56:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:59,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686236619] [2020-10-29 13:56:59,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:59,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:56:59,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473536455] [2020-10-29 13:56:59,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:56:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:56:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:59,105 INFO L87 Difference]: Start difference. First operand 1338 states and 2119 transitions. Second operand 5 states. [2020-10-29 13:57:00,249 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:57:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:00,520 INFO L93 Difference]: Finished difference Result 3817 states and 6032 transitions. [2020-10-29 13:57:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:00,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-29 13:57:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:00,537 INFO L225 Difference]: With dead ends: 3817 [2020-10-29 13:57:00,537 INFO L226 Difference]: Without dead ends: 2538 [2020-10-29 13:57:00,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2020-10-29 13:57:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2535. [2020-10-29 13:57:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2535 states. [2020-10-29 13:57:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3968 transitions. [2020-10-29 13:57:00,783 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3968 transitions. Word has length 66 [2020-10-29 13:57:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:00,784 INFO L481 AbstractCegarLoop]: Abstraction has 2535 states and 3968 transitions. [2020-10-29 13:57:00,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3968 transitions. [2020-10-29 13:57:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:57:00,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:00,788 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] [2020-10-29 13:57:00,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:57:00,789 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 167114767, now seen corresponding path program 1 times [2020-10-29 13:57:00,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:00,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871343422] [2020-10-29 13:57:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:00,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:00,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:01,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:04,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:04,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:57:04,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:57:04,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3580 [2020-10-29 13:57:04,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:04,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:57:04,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:04,690 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:04,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:04,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:04,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:04,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:04,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871343422] [2020-10-29 13:57:04,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:04,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699838880] [2020-10-29 13:57:04,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:04,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:04,733 INFO L87 Difference]: Start difference. First operand 2535 states and 3968 transitions. Second operand 5 states. [2020-10-29 13:57:06,042 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:57:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:06,315 INFO L93 Difference]: Finished difference Result 7310 states and 11437 transitions. [2020-10-29 13:57:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:06,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-29 13:57:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:06,344 INFO L225 Difference]: With dead ends: 7310 [2020-10-29 13:57:06,344 INFO L226 Difference]: Without dead ends: 4860 [2020-10-29 13:57:06,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2020-10-29 13:57:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 4857. [2020-10-29 13:57:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4857 states. [2020-10-29 13:57:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 7517 transitions. [2020-10-29 13:57:06,777 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 7517 transitions. Word has length 67 [2020-10-29 13:57:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:06,779 INFO L481 AbstractCegarLoop]: Abstraction has 4857 states and 7517 transitions. [2020-10-29 13:57:06,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 7517 transitions. [2020-10-29 13:57:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:57:06,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:06,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:06,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:57:06,788 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 980380754, now seen corresponding path program 1 times [2020-10-29 13:57:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:06,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655951870] [2020-10-29 13:57:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:06,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:06,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:07,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:07,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3117 [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:57:09,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:10,191 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:10,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:10,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:10,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:10,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:10,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655951870] [2020-10-29 13:57:10,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:10,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165168826] [2020-10-29 13:57:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:10,237 INFO L87 Difference]: Start difference. First operand 4857 states and 7517 transitions. Second operand 5 states. [2020-10-29 13:57:10,482 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:57:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:11,957 INFO L93 Difference]: Finished difference Result 8183 states and 12572 transitions. [2020-10-29 13:57:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:57:11,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:57:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:11,986 INFO L225 Difference]: With dead ends: 8183 [2020-10-29 13:57:11,987 INFO L226 Difference]: Without dead ends: 5643 [2020-10-29 13:57:11,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-29 13:57:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5640. [2020-10-29 13:57:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2020-10-29 13:57:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 8580 transitions. [2020-10-29 13:57:12,494 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 8580 transitions. Word has length 68 [2020-10-29 13:57:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:12,495 INFO L481 AbstractCegarLoop]: Abstraction has 5640 states and 8580 transitions. [2020-10-29 13:57:12,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 8580 transitions. [2020-10-29 13:57:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:57:12,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:12,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:12,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:57:12,506 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1065658950, now seen corresponding path program 1 times [2020-10-29 13:57:12,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:12,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316391714] [2020-10-29 13:57:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:12,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:12,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:13,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:13,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:57:13,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:57:13,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:57:13,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:13,749 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:13,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:57:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:13,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316391714] [2020-10-29 13:57:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:13,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4760072] [2020-10-29 13:57:13,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:13,814 INFO L87 Difference]: Start difference. First operand 5640 states and 8580 transitions. Second operand 5 states. [2020-10-29 13:57:15,301 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:57:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:15,786 INFO L93 Difference]: Finished difference Result 15510 states and 23876 transitions. [2020-10-29 13:57:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:15,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:57:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:15,843 INFO L225 Difference]: With dead ends: 15510 [2020-10-29 13:57:15,843 INFO L226 Difference]: Without dead ends: 10767 [2020-10-29 13:57:15,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2020-10-29 13:57:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 10764. [2020-10-29 13:57:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10764 states. [2020-10-29 13:57:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10764 states to 10764 states and 16212 transitions. [2020-10-29 13:57:16,878 INFO L78 Accepts]: Start accepts. Automaton has 10764 states and 16212 transitions. Word has length 68 [2020-10-29 13:57:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:16,879 INFO L481 AbstractCegarLoop]: Abstraction has 10764 states and 16212 transitions. [2020-10-29 13:57:16,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10764 states and 16212 transitions. [2020-10-29 13:57:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:57:16,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:16,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:16,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:57:16,895 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1086824928, now seen corresponding path program 1 times [2020-10-29 13:57:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:16,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213436274] [2020-10-29 13:57:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:17,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:17,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:17,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:18,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:57:18,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:18,314 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:18,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:18,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:18,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:18,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:18,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213436274] [2020-10-29 13:57:18,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:18,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:18,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744959598] [2020-10-29 13:57:18,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:18,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:18,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:18,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:18,358 INFO L87 Difference]: Start difference. First operand 10764 states and 16212 transitions. Second operand 5 states. [2020-10-29 13:57:20,190 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:57:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:21,036 INFO L93 Difference]: Finished difference Result 29662 states and 45222 transitions. [2020-10-29 13:57:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:21,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:57:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:21,086 INFO L225 Difference]: With dead ends: 29662 [2020-10-29 13:57:21,086 INFO L226 Difference]: Without dead ends: 20579 [2020-10-29 13:57:21,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20579 states. [2020-10-29 13:57:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20579 to 20576. [2020-10-29 13:57:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20576 states. [2020-10-29 13:57:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20576 states to 20576 states and 30682 transitions. [2020-10-29 13:57:22,910 INFO L78 Accepts]: Start accepts. Automaton has 20576 states and 30682 transitions. Word has length 68 [2020-10-29 13:57:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:22,911 INFO L481 AbstractCegarLoop]: Abstraction has 20576 states and 30682 transitions. [2020-10-29 13:57:22,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20576 states and 30682 transitions. [2020-10-29 13:57:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:57:22,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:22,939 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] [2020-10-29 13:57:22,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:57:22,939 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash 707092382, now seen corresponding path program 1 times [2020-10-29 13:57:22,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:22,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609983639] [2020-10-29 13:57:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:23,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:23,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:57:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:57:23,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:57:23,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:24,047 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:24,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:24,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:24,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:24,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:24,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:24,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609983639] [2020-10-29 13:57:24,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:24,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:57:24,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60227982] [2020-10-29 13:57:24,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:57:24,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:24,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:57:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:57:24,085 INFO L87 Difference]: Start difference. First operand 20576 states and 30682 transitions. Second operand 4 states. [2020-10-29 13:57:24,429 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:57:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:27,880 INFO L93 Difference]: Finished difference Result 53318 states and 81854 transitions. [2020-10-29 13:57:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:57:27,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:57:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:27,977 INFO L225 Difference]: With dead ends: 53318 [2020-10-29 13:57:27,978 INFO L226 Difference]: Without dead ends: 35939 [2020-10-29 13:57:28,031 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 [2020-10-29 13:57:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35939 states. [2020-10-29 13:57:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35939 to 35936. [2020-10-29 13:57:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35936 states. [2020-10-29 13:57:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35936 states to 35936 states and 54394 transitions. [2020-10-29 13:57:31,438 INFO L78 Accepts]: Start accepts. Automaton has 35936 states and 54394 transitions. Word has length 69 [2020-10-29 13:57:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:31,439 INFO L481 AbstractCegarLoop]: Abstraction has 35936 states and 54394 transitions. [2020-10-29 13:57:31,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:57:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 35936 states and 54394 transitions. [2020-10-29 13:57:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:57:31,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:31,475 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] [2020-10-29 13:57:31,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:57:31,475 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 946424064, now seen corresponding path program 1 times [2020-10-29 13:57:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112358378] [2020-10-29 13:57:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:31,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:32,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:32,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:32,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:57:32,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:33,079 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:33,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:33,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:33,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:33,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:57:33,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:33,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:33,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:33,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112358378] [2020-10-29 13:57:33,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:33,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314284617] [2020-10-29 13:57:33,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:33,121 INFO L87 Difference]: Start difference. First operand 35936 states and 54394 transitions. Second operand 5 states. [2020-10-29 13:57:33,363 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:57:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:37,380 INFO L93 Difference]: Finished difference Result 57168 states and 86026 transitions. [2020-10-29 13:57:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:57:37,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:57:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:37,474 INFO L225 Difference]: With dead ends: 57168 [2020-10-29 13:57:37,474 INFO L226 Difference]: Without dead ends: 38259 [2020-10-29 13:57:37,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38259 states. [2020-10-29 13:57:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38259 to 38252. [2020-10-29 13:57:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38252 states. [2020-10-29 13:57:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38252 states to 38252 states and 57030 transitions. [2020-10-29 13:57:41,267 INFO L78 Accepts]: Start accepts. Automaton has 38252 states and 57030 transitions. Word has length 72 [2020-10-29 13:57:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:41,267 INFO L481 AbstractCegarLoop]: Abstraction has 38252 states and 57030 transitions. [2020-10-29 13:57:41,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 38252 states and 57030 transitions. [2020-10-29 13:57:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:57:41,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:41,292 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] [2020-10-29 13:57:41,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:57:41,292 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -978425662, now seen corresponding path program 1 times [2020-10-29 13:57:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:41,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663711983] [2020-10-29 13:57:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:41,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:41,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:41,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:41,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:42,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:57:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:57:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:57:42,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:43,009 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:43,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:43,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:43,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:43,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:57:43,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:43,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:43,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:43,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663711983] [2020-10-29 13:57:43,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:43,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:57:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900046938] [2020-10-29 13:57:43,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:57:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:57:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:57:43,068 INFO L87 Difference]: Start difference. First operand 38252 states and 57030 transitions. Second operand 5 states. [2020-10-29 13:57:43,372 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:57:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:48,325 INFO L93 Difference]: Finished difference Result 61933 states and 92322 transitions. [2020-10-29 13:57:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:57:48,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:57:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:48,423 INFO L225 Difference]: With dead ends: 61933 [2020-10-29 13:57:48,423 INFO L226 Difference]: Without dead ends: 43196 [2020-10-29 13:57:48,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:57:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43196 states. [2020-10-29 13:57:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43196 to 43193. [2020-10-29 13:57:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43193 states. [2020-10-29 13:57:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43193 states to 43193 states and 63339 transitions. [2020-10-29 13:57:52,322 INFO L78 Accepts]: Start accepts. Automaton has 43193 states and 63339 transitions. Word has length 72 [2020-10-29 13:57:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:52,322 INFO L481 AbstractCegarLoop]: Abstraction has 43193 states and 63339 transitions. [2020-10-29 13:57:52,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 43193 states and 63339 transitions. [2020-10-29 13:57:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:57:52,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:52,347 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] [2020-10-29 13:57:52,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:57:52,347 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1809749114, now seen corresponding path program 1 times [2020-10-29 13:57:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:52,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958240570] [2020-10-29 13:57:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:52,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:57:52,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:57:52,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-29 13:57:52,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:52,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:57:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:57:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:57:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:53,223 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:57:53,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:53,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:53,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:53,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958240570] [2020-10-29 13:57:53,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:57:53,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:57:53,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920097626] [2020-10-29 13:57:53,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:57:53,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:53,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:57:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:57:53,260 INFO L87 Difference]: Start difference. First operand 43193 states and 63339 transitions. Second operand 6 states. [2020-10-29 13:57:53,604 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:57:57,012 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:57:57,319 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:58:00,183 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:00,828 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:58:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:08,414 INFO L93 Difference]: Finished difference Result 180691 states and 273857 transitions. [2020-10-29 13:58:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:58:08,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:58:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:08,877 INFO L225 Difference]: With dead ends: 180691 [2020-10-29 13:58:08,877 INFO L226 Difference]: Without dead ends: 142812 [2020-10-29 13:58:08,958 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 [2020-10-29 13:58:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142812 states. [2020-10-29 13:58:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142812 to 77003. [2020-10-29 13:58:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77003 states. [2020-10-29 13:58:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77003 states to 77003 states and 114007 transitions. [2020-10-29 13:58:17,786 INFO L78 Accepts]: Start accepts. Automaton has 77003 states and 114007 transitions. Word has length 72 [2020-10-29 13:58:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:17,786 INFO L481 AbstractCegarLoop]: Abstraction has 77003 states and 114007 transitions. [2020-10-29 13:58:17,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:58:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 77003 states and 114007 transitions. [2020-10-29 13:58:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:58:17,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:17,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:58:17,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:58:17,823 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1808862592, now seen corresponding path program 1 times [2020-10-29 13:58:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296866355] [2020-10-29 13:58:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:17,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:17,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:18,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:18,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:58:18,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:58:18,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-29 13:58:18,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:18,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:18,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:58:18,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 13:58:18,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:58:18,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:18,917 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:58:18,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:18,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:18,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:18,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:18,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:19,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296866355] [2020-10-29 13:58:19,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:19,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:19,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865481481] [2020-10-29 13:58:19,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:19,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:19,129 INFO L87 Difference]: Start difference. First operand 77003 states and 114007 transitions. Second operand 5 states. [2020-10-29 13:58:19,451 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-29 13:58:23,283 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:58:30,132 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-29 13:58:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:58:36,649 INFO L93 Difference]: Finished difference Result 190362 states and 285075 transitions. [2020-10-29 13:58:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:58:36,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:58:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:58:37,097 INFO L225 Difference]: With dead ends: 190362 [2020-10-29 13:58:37,097 INFO L226 Difference]: Without dead ends: 147013 [2020-10-29 13:58:37,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:58:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147013 states. [2020-10-29 13:58:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147013 to 119127. [2020-10-29 13:58:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119127 states. [2020-10-29 13:58:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119127 states to 119127 states and 176531 transitions. [2020-10-29 13:58:50,605 INFO L78 Accepts]: Start accepts. Automaton has 119127 states and 176531 transitions. Word has length 73 [2020-10-29 13:58:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:58:50,605 INFO L481 AbstractCegarLoop]: Abstraction has 119127 states and 176531 transitions. [2020-10-29 13:58:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:58:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 119127 states and 176531 transitions. [2020-10-29 13:58:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:58:50,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:58:50,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:58:50,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:58:50,651 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:58:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:58:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1642611529, now seen corresponding path program 1 times [2020-10-29 13:58:50,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:58:50,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836332286] [2020-10-29 13:58:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:58:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:50,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:51,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:51,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:58:51,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:58:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:51,711 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:58:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:58:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:58:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:58:51,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:58:51,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:58:51,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:58:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:58:51,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:58:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:58:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836332286] [2020-10-29 13:58:51,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:58:51,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:58:51,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860149412] [2020-10-29 13:58:51,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:58:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:58:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:58:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:58:51,767 INFO L87 Difference]: Start difference. First operand 119127 states and 176531 transitions. Second operand 5 states. [2020-10-29 13:58:52,377 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:58:56,455 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:59:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:59:17,802 INFO L93 Difference]: Finished difference Result 335188 states and 504757 transitions. [2020-10-29 13:59:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:59:17,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:59:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:59:18,457 INFO L225 Difference]: With dead ends: 335188 [2020-10-29 13:59:18,457 INFO L226 Difference]: Without dead ends: 221333 [2020-10-29 13:59:18,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:59:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221333 states. [2020-10-29 13:59:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221333 to 169403. [2020-10-29 13:59:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169403 states. [2020-10-29 13:59:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169403 states to 169403 states and 251695 transitions. [2020-10-29 13:59:38,648 INFO L78 Accepts]: Start accepts. Automaton has 169403 states and 251695 transitions. Word has length 73 [2020-10-29 13:59:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:59:38,648 INFO L481 AbstractCegarLoop]: Abstraction has 169403 states and 251695 transitions. [2020-10-29 13:59:38,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:59:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 169403 states and 251695 transitions. [2020-10-29 13:59:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:59:38,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:59:38,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:59:38,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:59:38,699 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:59:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:59:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash -217877790, now seen corresponding path program 1 times [2020-10-29 13:59:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:59:38,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046329148] [2020-10-29 13:59:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:59:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:38,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:39,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:39,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:59:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:59:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:59:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:40,099 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:59:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:59:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:59:40,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:59:40,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:59:40,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:59:40,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:59:40,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:59:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:59:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046329148] [2020-10-29 13:59:40,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:59:40,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:59:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146329065] [2020-10-29 13:59:40,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:59:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:59:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:59:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:59:40,135 INFO L87 Difference]: Start difference. First operand 169403 states and 251695 transitions. Second operand 5 states. [2020-10-29 13:59:40,463 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-29 13:59:44,655 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:59:54,476 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 207