/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=SHALLOWEST --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.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:55:18,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:55:18,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:55:18,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:55:18,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:55:18,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:55:18,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:55:18,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:55:18,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:55:18,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:55:18,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:55:18,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:55:18,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:55:18,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:55:18,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:55:18,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:55:18,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:55:18,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:55:18,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:55:18,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:55:18,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:55:18,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:55:18,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:55:18,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:55:18,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:55:18,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:55:18,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:55:18,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:55:18,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:55:18,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:55:18,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:55:18,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:55:18,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:55:18,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:55:18,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:55:18,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:55:18,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:55:18,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:55:18,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:55:18,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:55:18,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:55:18,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:55:18,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:55:18,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:55:18,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:55:18,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:55:18,859 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:55:18,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:55:18,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:55:18,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:55:18,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:55:18,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:55:18,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:55:18,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:55:18,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:55:18,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:55:18,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:55:18,862 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:55:18,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:55:18,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:55:18,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:55:18,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:55:18,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:55:18,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:55:18,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:55:18,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:55:18,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:55:18,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:55:18,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:55:18,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:55:18,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:55:18,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:55:19,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:55:19,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:55:19,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:55:19,345 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:55:19,346 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:55:19,349 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:55:19,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9676883f/808c2f06e5ac4d36ad19cbdacca506ca/FLAGc485d183e [2020-10-27 05:55:20,208 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:55:20,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:55:20,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9676883f/808c2f06e5ac4d36ad19cbdacca506ca/FLAGc485d183e [2020-10-27 05:55:20,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a9676883f/808c2f06e5ac4d36ad19cbdacca506ca [2020-10-27 05:55:20,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:55:20,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:55:20,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:55:20,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:55:20,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:55:20,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:20" (1/1) ... [2020-10-27 05:55:20,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471e5d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:20, skipping insertion in model container [2020-10-27 05:55:20,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:20" (1/1) ... [2020-10-27 05:55:20,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:55:20,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:55:20,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:55:20,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:55:21,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:55:21,085 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:55:21,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21 WrapperNode [2020-10-27 05:55:21,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:55:21,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:55:21,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:55:21,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:55:21,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... [2020-10-27 05:55:21,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:55:21,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:55:21,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:55:21,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:55:21,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:55:21,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:55:21,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:55:21,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:55:21,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:55:21,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:55:21,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:55:21,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:55:21,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:55:21,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:55:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:55:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:55:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:55:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:55:22,405 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:55:22,406 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:55:22,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:22 BoogieIcfgContainer [2020-10-27 05:55:22,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:55:22,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:55:22,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:55:22,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:55:22,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:55:20" (1/3) ... [2020-10-27 05:55:22,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1624e729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:22, skipping insertion in model container [2020-10-27 05:55:22,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:21" (2/3) ... [2020-10-27 05:55:22,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1624e729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:22, skipping insertion in model container [2020-10-27 05:55:22,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:22" (3/3) ... [2020-10-27 05:55:22,419 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:55:22,433 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:55:22,448 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:55:22,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:55:22,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:55:22,499 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:55:22,499 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:55:22,499 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:55:22,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:55:22,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:55:22,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:55:22,500 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:55:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-27 05:55:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:55:22,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:22,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:22,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1140957863, now seen corresponding path program 1 times [2020-10-27 05:55:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:22,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830679076] [2020-10-27 05:55:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:26,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:26,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:55:26,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3967 [2020-10-27 05:55:26,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 05:55:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 05:55:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:55:27,360 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:27,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:27,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:27,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:27,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:55:27,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:27,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:27,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830679076] [2020-10-27 05:55:27,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:27,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:27,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512414170] [2020-10-27 05:55:27,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:27,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:27,477 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-27 05:55:27,906 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:55:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:28,820 INFO L93 Difference]: Finished difference Result 348 states and 574 transitions. [2020-10-27 05:55:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:28,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 05:55:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:28,841 INFO L225 Difference]: With dead ends: 348 [2020-10-27 05:55:28,841 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 05:55:28,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 05:55:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2020-10-27 05:55:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 05:55:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 364 transitions. [2020-10-27 05:55:28,924 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 364 transitions. Word has length 61 [2020-10-27 05:55:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:28,926 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 364 transitions. [2020-10-27 05:55:28,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 364 transitions. [2020-10-27 05:55:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 05:55:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:28,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:28,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:55:28,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:28,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1703080058, now seen corresponding path program 1 times [2020-10-27 05:55:28,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:28,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885804233] [2020-10-27 05:55:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:29,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:29,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:29,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:34,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:34,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 05:55:34,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:34,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:55:34,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:55:34,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:34,537 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:34,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:34,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:34,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:55:34,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:34,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:34,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885804233] [2020-10-27 05:55:34,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:34,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285613392] [2020-10-27 05:55:34,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:34,605 INFO L87 Difference]: Start difference. First operand 233 states and 364 transitions. Second operand 5 states. [2020-10-27 05:55:36,047 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:36,205 INFO L93 Difference]: Finished difference Result 657 states and 1027 transitions. [2020-10-27 05:55:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:36,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 05:55:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:36,216 INFO L225 Difference]: With dead ends: 657 [2020-10-27 05:55:36,216 INFO L226 Difference]: Without dead ends: 445 [2020-10-27 05:55:36,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-27 05:55:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-10-27 05:55:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-27 05:55:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 689 transitions. [2020-10-27 05:55:36,273 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 689 transitions. Word has length 63 [2020-10-27 05:55:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:36,274 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 689 transitions. [2020-10-27 05:55:36,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 689 transitions. [2020-10-27 05:55:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:55:36,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:36,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:55:36,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:36,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1583511459, now seen corresponding path program 1 times [2020-10-27 05:55:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:36,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223684642] [2020-10-27 05:55:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:36,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:36,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:55:40,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4676 [2020-10-27 05:55:40,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:55:40,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:55:41,446 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:41,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:41,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:41,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:41,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:55:41,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:41,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:41,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:41,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223684642] [2020-10-27 05:55:41,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:41,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:41,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466652422] [2020-10-27 05:55:41,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:41,507 INFO L87 Difference]: Start difference. First operand 442 states and 689 transitions. Second operand 5 states. [2020-10-27 05:55:43,272 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:43,418 INFO L93 Difference]: Finished difference Result 1239 states and 1925 transitions. [2020-10-27 05:55:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:43,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 05:55:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:43,428 INFO L225 Difference]: With dead ends: 1239 [2020-10-27 05:55:43,428 INFO L226 Difference]: Without dead ends: 846 [2020-10-27 05:55:43,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-27 05:55:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 843. [2020-10-27 05:55:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-10-27 05:55:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1305 transitions. [2020-10-27 05:55:43,545 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1305 transitions. Word has length 64 [2020-10-27 05:55:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:43,547 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1305 transitions. [2020-10-27 05:55:43,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1305 transitions. [2020-10-27 05:55:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:55:43,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:43,553 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] [2020-10-27 05:55:43,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:55:43,553 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1086759906, now seen corresponding path program 1 times [2020-10-27 05:55:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:43,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87878676] [2020-10-27 05:55:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:48,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:55:48,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4419 [2020-10-27 05:55:48,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:48,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:55:48,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:48,418 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:48,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:48,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:55:48,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:48,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:48,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:48,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:48,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87878676] [2020-10-27 05:55:48,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:48,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482156870] [2020-10-27 05:55:48,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:48,468 INFO L87 Difference]: Start difference. First operand 843 states and 1305 transitions. Second operand 5 states. [2020-10-27 05:55:48,830 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:55:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:49,999 INFO L93 Difference]: Finished difference Result 1512 states and 2320 transitions. [2020-10-27 05:55:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:49,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 05:55:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:50,006 INFO L225 Difference]: With dead ends: 1512 [2020-10-27 05:55:50,006 INFO L226 Difference]: Without dead ends: 1075 [2020-10-27 05:55:50,008 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 [2020-10-27 05:55:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-10-27 05:55:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1072. [2020-10-27 05:55:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2020-10-27 05:55:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1635 transitions. [2020-10-27 05:55:50,116 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1635 transitions. Word has length 65 [2020-10-27 05:55:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:50,116 INFO L481 AbstractCegarLoop]: Abstraction has 1072 states and 1635 transitions. [2020-10-27 05:55:50,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1635 transitions. [2020-10-27 05:55:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:55:50,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:50,120 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] [2020-10-27 05:55:50,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:55:50,120 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash -272842107, now seen corresponding path program 1 times [2020-10-27 05:55:50,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:50,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754328768] [2020-10-27 05:55:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:50,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:50,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:55:50,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:55:50,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 05:55:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:55:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:55:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:51,305 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:51,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:51,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:51,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:51,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:51,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:51,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:51,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754328768] [2020-10-27 05:55:51,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:51,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:51,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601628337] [2020-10-27 05:55:51,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:51,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:51,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:51,359 INFO L87 Difference]: Start difference. First operand 1072 states and 1635 transitions. Second operand 4 states. [2020-10-27 05:55:51,719 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:55:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:52,697 INFO L93 Difference]: Finished difference Result 2589 states and 4084 transitions. [2020-10-27 05:55:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:52,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 05:55:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:52,708 INFO L225 Difference]: With dead ends: 2589 [2020-10-27 05:55:52,708 INFO L226 Difference]: Without dead ends: 1793 [2020-10-27 05:55:52,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-10-27 05:55:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1780. [2020-10-27 05:55:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2020-10-27 05:55:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2765 transitions. [2020-10-27 05:55:52,880 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2765 transitions. Word has length 65 [2020-10-27 05:55:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:52,881 INFO L481 AbstractCegarLoop]: Abstraction has 1780 states and 2765 transitions. [2020-10-27 05:55:52,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2765 transitions. [2020-10-27 05:55:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:55:52,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:52,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:52,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:55:52,885 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:52,886 INFO L82 PathProgramCache]: Analyzing trace with hash 428789668, now seen corresponding path program 1 times [2020-10-27 05:55:52,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:52,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587321684] [2020-10-27 05:55:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:52,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:52,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:53,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:54,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:55:54,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:55,245 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:55,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:55,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587321684] [2020-10-27 05:55:55,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:55,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:55,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209217165] [2020-10-27 05:55:55,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:55,327 INFO L87 Difference]: Start difference. First operand 1780 states and 2765 transitions. Second operand 5 states. [2020-10-27 05:55:56,580 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:55:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:56,918 INFO L93 Difference]: Finished difference Result 5114 states and 7929 transitions. [2020-10-27 05:55:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:56,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 05:55:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:56,940 INFO L225 Difference]: With dead ends: 5114 [2020-10-27 05:55:56,940 INFO L226 Difference]: Without dead ends: 3398 [2020-10-27 05:55:56,946 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 [2020-10-27 05:55:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2020-10-27 05:55:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3395. [2020-10-27 05:55:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3395 states. [2020-10-27 05:55:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5221 transitions. [2020-10-27 05:55:57,265 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5221 transitions. Word has length 67 [2020-10-27 05:55:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:57,265 INFO L481 AbstractCegarLoop]: Abstraction has 3395 states and 5221 transitions. [2020-10-27 05:55:57,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5221 transitions. [2020-10-27 05:55:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:55:57,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:57,271 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] [2020-10-27 05:55:57,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:55:57,272 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2005644238, now seen corresponding path program 1 times [2020-10-27 05:55:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:57,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120205539] [2020-10-27 05:55:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:57,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:57,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:59,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:59,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:55:59,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:59,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-27 05:55:59,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:59,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:55:59,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:59,394 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:55:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:59,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:59,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:55:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120205539] [2020-10-27 05:55:59,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281696697] [2020-10-27 05:55:59,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:59,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:59,447 INFO L87 Difference]: Start difference. First operand 3395 states and 5221 transitions. Second operand 5 states. [2020-10-27 05:56:00,817 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:01,199 INFO L93 Difference]: Finished difference Result 9810 states and 15059 transitions. [2020-10-27 05:56:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:01,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 05:56:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:01,235 INFO L225 Difference]: With dead ends: 9810 [2020-10-27 05:56:01,235 INFO L226 Difference]: Without dead ends: 6490 [2020-10-27 05:56:01,244 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 [2020-10-27 05:56:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2020-10-27 05:56:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6485. [2020-10-27 05:56:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6485 states. [2020-10-27 05:56:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9869 transitions. [2020-10-27 05:56:01,837 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9869 transitions. Word has length 68 [2020-10-27 05:56:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:01,837 INFO L481 AbstractCegarLoop]: Abstraction has 6485 states and 9869 transitions. [2020-10-27 05:56:01,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9869 transitions. [2020-10-27 05:56:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:56:01,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:01,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:01,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:56:01,848 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1098911319, now seen corresponding path program 1 times [2020-10-27 05:56:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:01,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981812122] [2020-10-27 05:56:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:01,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:02,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:02,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:02,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:56:02,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:56:02,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-27 05:56:02,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:02,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 05:56:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:56:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:03,122 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:03,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:03,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:03,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:03,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:03,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:56:03,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:03,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:03,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981812122] [2020-10-27 05:56:03,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:03,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:56:03,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510189035] [2020-10-27 05:56:03,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:56:03,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:56:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:56:03,169 INFO L87 Difference]: Start difference. First operand 6485 states and 9869 transitions. Second operand 4 states. [2020-10-27 05:56:03,532 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:05,000 INFO L93 Difference]: Finished difference Result 16167 states and 25173 transitions. [2020-10-27 05:56:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:56:05,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:56:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:05,062 INFO L225 Difference]: With dead ends: 16167 [2020-10-27 05:56:05,062 INFO L226 Difference]: Without dead ends: 10616 [2020-10-27 05:56:05,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2020-10-27 05:56:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 10549. [2020-10-27 05:56:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10549 states. [2020-10-27 05:56:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 16189 transitions. [2020-10-27 05:56:05,962 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 16189 transitions. Word has length 69 [2020-10-27 05:56:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:05,963 INFO L481 AbstractCegarLoop]: Abstraction has 10549 states and 16189 transitions. [2020-10-27 05:56:05,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:56:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 16189 transitions. [2020-10-27 05:56:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:56:05,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:05,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:05,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:56:05,974 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 823188726, now seen corresponding path program 1 times [2020-10-27 05:56:05,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:05,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991303751] [2020-10-27 05:56:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:06,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:06,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:07,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:56:07,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:08,333 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:08,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:08,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:08,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:08,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:08,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991303751] [2020-10-27 05:56:08,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:08,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81135940] [2020-10-27 05:56:08,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:08,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:08,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:08,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:08,379 INFO L87 Difference]: Start difference. First operand 10549 states and 16189 transitions. Second operand 5 states. [2020-10-27 05:56:10,036 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:10,934 INFO L93 Difference]: Finished difference Result 30405 states and 46602 transitions. [2020-10-27 05:56:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:10,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 05:56:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:10,984 INFO L225 Difference]: With dead ends: 30405 [2020-10-27 05:56:10,984 INFO L226 Difference]: Without dead ends: 20074 [2020-10-27 05:56:11,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:56:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2020-10-27 05:56:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 20071. [2020-10-27 05:56:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20071 states. [2020-10-27 05:56:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20071 states to 20071 states and 30494 transitions. [2020-10-27 05:56:12,599 INFO L78 Accepts]: Start accepts. Automaton has 20071 states and 30494 transitions. Word has length 71 [2020-10-27 05:56:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:12,599 INFO L481 AbstractCegarLoop]: Abstraction has 20071 states and 30494 transitions. [2020-10-27 05:56:12,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20071 states and 30494 transitions. [2020-10-27 05:56:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:56:12,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:12,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:12,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:56:12,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:12,622 INFO L82 PathProgramCache]: Analyzing trace with hash -234568942, now seen corresponding path program 1 times [2020-10-27 05:56:12,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:12,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505832005] [2020-10-27 05:56:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:13,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:13,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:56:13,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:14,128 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:14,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:14,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:14,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:14,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:14,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:14,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505832005] [2020-10-27 05:56:14,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:14,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855030185] [2020-10-27 05:56:14,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:14,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:14,176 INFO L87 Difference]: Start difference. First operand 20071 states and 30494 transitions. Second operand 5 states. [2020-10-27 05:56:16,477 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:18,697 INFO L93 Difference]: Finished difference Result 56670 states and 86612 transitions. [2020-10-27 05:56:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:56:18,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-27 05:56:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:18,857 INFO L225 Difference]: With dead ends: 56670 [2020-10-27 05:56:18,857 INFO L226 Difference]: Without dead ends: 38235 [2020-10-27 05:56:18,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:56:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38235 states. [2020-10-27 05:56:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38235 to 38232. [2020-10-27 05:56:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38232 states. [2020-10-27 05:56:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38232 states to 38232 states and 57488 transitions. [2020-10-27 05:56:22,453 INFO L78 Accepts]: Start accepts. Automaton has 38232 states and 57488 transitions. Word has length 72 [2020-10-27 05:56:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:22,454 INFO L481 AbstractCegarLoop]: Abstraction has 38232 states and 57488 transitions. [2020-10-27 05:56:22,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38232 states and 57488 transitions. [2020-10-27 05:56:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:56:22,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:22,493 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] [2020-10-27 05:56:22,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:56:22,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1803743093, now seen corresponding path program 1 times [2020-10-27 05:56:22,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:22,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890415186] [2020-10-27 05:56:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:56:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:23,352 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:23,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:23,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:23,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:23,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:23,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890415186] [2020-10-27 05:56:23,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:23,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:56:23,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703101427] [2020-10-27 05:56:23,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:56:23,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:56:23,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:23,398 INFO L87 Difference]: Start difference. First operand 38232 states and 57488 transitions. Second operand 6 states. [2020-10-27 05:56:23,882 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:26,920 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:56:27,377 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:29,287 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:29,966 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:36,973 INFO L93 Difference]: Finished difference Result 168298 states and 260316 transitions. [2020-10-27 05:56:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:56:36,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:56:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:37,473 INFO L225 Difference]: With dead ends: 168298 [2020-10-27 05:56:37,474 INFO L226 Difference]: Without dead ends: 133031 [2020-10-27 05:56:37,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:56:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133031 states. [2020-10-27 05:56:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133031 to 69592. [2020-10-27 05:56:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69592 states. [2020-10-27 05:56:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69592 states to 69592 states and 105392 transitions. [2020-10-27 05:56:45,164 INFO L78 Accepts]: Start accepts. Automaton has 69592 states and 105392 transitions. Word has length 73 [2020-10-27 05:56:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:45,164 INFO L481 AbstractCegarLoop]: Abstraction has 69592 states and 105392 transitions. [2020-10-27 05:56:45,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:56:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 69592 states and 105392 transitions. [2020-10-27 05:56:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:56:45,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:45,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:45,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:56:45,222 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1828802427, now seen corresponding path program 1 times [2020-10-27 05:56:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:45,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435594249] [2020-10-27 05:56:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:45,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:45,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:56:45,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:56:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-27 05:56:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 05:56:46,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:56:46,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:46,372 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:56:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:46,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:46,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:46,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435594249] [2020-10-27 05:56:46,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:46,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:46,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31005019] [2020-10-27 05:56:46,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:46,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:46,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:46,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:46,424 INFO L87 Difference]: Start difference. First operand 69592 states and 105392 transitions. Second operand 5 states. [2020-10-27 05:56:46,812 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:56:51,038 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:57:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:00,714 INFO L93 Difference]: Finished difference Result 208097 states and 320214 transitions. [2020-10-27 05:57:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:57:00,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-27 05:57:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:01,092 INFO L225 Difference]: With dead ends: 208097 [2020-10-27 05:57:01,092 INFO L226 Difference]: Without dead ends: 141470 [2020-10-27 05:57:01,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:57:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141470 states. [2020-10-27 05:57:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141470 to 104984. [2020-10-27 05:57:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104984 states. [2020-10-27 05:57:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104984 states to 104984 states and 159632 transitions. [2020-10-27 05:57:12,066 INFO L78 Accepts]: Start accepts. Automaton has 104984 states and 159632 transitions. Word has length 74 [2020-10-27 05:57:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:12,066 INFO L481 AbstractCegarLoop]: Abstraction has 104984 states and 159632 transitions. [2020-10-27 05:57:12,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 104984 states and 159632 transitions. [2020-10-27 05:57:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:57:12,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:12,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:12,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:57:12,130 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1667702158, now seen corresponding path program 1 times [2020-10-27 05:57:12,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:12,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886483396] [2020-10-27 05:57:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:57:12,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:13,341 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:57:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:13,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:13,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886483396] [2020-10-27 05:57:13,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:57:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159328815] [2020-10-27 05:57:13,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:57:13,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:57:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:13,385 INFO L87 Difference]: Start difference. First operand 104984 states and 159632 transitions. Second operand 7 states. [2020-10-27 05:57:13,835 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 05:57:18,042 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:57:18,583 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:18,987 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:57:20,570 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:57:21,115 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:57:25,073 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:57:52,644 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:57:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:58,451 INFO L93 Difference]: Finished difference Result 508356 states and 774932 transitions. [2020-10-27 05:57:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:57:58,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-27 05:57:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:59,695 INFO L225 Difference]: With dead ends: 508356 [2020-10-27 05:57:59,696 INFO L226 Difference]: Without dead ends: 406337 [2020-10-27 05:57:59,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:58:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406337 states.