/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:16:11,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:16:11,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:16:11,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:16:11,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:16:11,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:16:11,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:16:11,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:16:11,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:16:11,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:16:11,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:16:11,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:16:11,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:16:11,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:16:11,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:16:11,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:16:11,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:16:11,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:16:11,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:16:11,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:16:11,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:16:11,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:16:11,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:16:11,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:16:11,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:16:11,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:16:11,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:16:11,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:16:11,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:16:11,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:16:11,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:16:11,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:16:11,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:16:11,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:16:11,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:16:11,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:16:11,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:16:11,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:16:11,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:16:11,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:16:11,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:16:11,951 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 [2020-10-28 19:16:12,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:16:12,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:16:12,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:16:12,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:16:12,021 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:16:12,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:16:12,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:16:12,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:16:12,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:16:12,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:16:12,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:16:12,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:16:12,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:16:12,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:16:12,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:16:12,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:16:12,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:16:12,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:16:12,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:16:12,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:16:12,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:16:12,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:16:12,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:16:12,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:16:12,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:16:12,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:16:12,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:16:12,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:16:12,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:16:12,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:16:12,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:16:12,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:16:12,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:16:12,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:16:12,503 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:16:12,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:16:12,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e146dd6/273ac556994442bc87760a6e08755053/FLAG3539e3e78 [2020-10-28 19:16:13,332 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:16:13,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:16:13,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e146dd6/273ac556994442bc87760a6e08755053/FLAG3539e3e78 [2020-10-28 19:16:13,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e146dd6/273ac556994442bc87760a6e08755053 [2020-10-28 19:16:13,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:16:13,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:16:13,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:16:13,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:16:13,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:16:13,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:16:13" (1/1) ... [2020-10-28 19:16:13,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19356399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:13, skipping insertion in model container [2020-10-28 19:16:13,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:16:13" (1/1) ... [2020-10-28 19:16:13,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:16:13,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:16:14,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:16:14,049 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:16:14,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:16:14,166 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:16:14,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14 WrapperNode [2020-10-28 19:16:14,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:16:14,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:16:14,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:16:14,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:16:14,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (1/1) ... [2020-10-28 19:16:14,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:16:14,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:16:14,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:16:14,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:16:14,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (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 [2020-10-28 19:16:14,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:16:14,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:16:14,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:16:14,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:16:14,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:16:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:16:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:16:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:16:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:16:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:16:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:16:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:16:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:16:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:16:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:16:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:16:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:16:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:16:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:16:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:16:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:16:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:16:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:16:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:16:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:16:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:16:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:16:15,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:16:15,501 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:16:15,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:16:15 BoogieIcfgContainer [2020-10-28 19:16:15,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:16:15,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:16:15,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:16:15,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:16:15,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:16:13" (1/3) ... [2020-10-28 19:16:15,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3709715d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:16:15, skipping insertion in model container [2020-10-28 19:16:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:16:14" (2/3) ... [2020-10-28 19:16:15,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3709715d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:16:15, skipping insertion in model container [2020-10-28 19:16:15,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:16:15" (3/3) ... [2020-10-28 19:16:15,547 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:16:15,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:16:15,593 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:16:15,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:16:15,642 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:16:15,643 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:16:15,643 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:16:15,643 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:16:15,643 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:16:15,643 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:16:15,643 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:16:15,644 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:16:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 19:16:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:16:15,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:15,686 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] [2020-10-28 19:16:15,687 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:15,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 19:16:15,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:15,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225427060] [2020-10-28 19:16:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:16,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:19,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:16:19,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:16:19,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3135 [2020-10-28 19:16:19,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:19,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 19:16:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:16:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:16:19,812 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:19,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:19,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:19,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:19,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:16:19,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:19,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:19,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:16:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:19,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225427060] [2020-10-28 19:16:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:19,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413138063] [2020-10-28 19:16:19,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:19,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:19,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:19,914 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-28 19:16:20,361 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:16:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:21,373 INFO L93 Difference]: Finished difference Result 338 states and 566 transitions. [2020-10-28 19:16:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:21,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:16:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:21,390 INFO L225 Difference]: With dead ends: 338 [2020-10-28 19:16:21,391 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 19:16:21,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 19:16:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-10-28 19:16:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 19:16:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2020-10-28 19:16:21,482 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 67 [2020-10-28 19:16:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:21,483 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2020-10-28 19:16:21,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2020-10-28 19:16:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:16:21,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:21,488 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] [2020-10-28 19:16:21,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:16:21,489 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:21,489 INFO L82 PathProgramCache]: Analyzing trace with hash 309649509, now seen corresponding path program 1 times [2020-10-28 19:16:21,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:21,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503316366] [2020-10-28 19:16:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:26,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:16:26,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 19:16:26,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:26,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:16:26,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:27,065 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:27,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:27,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:27,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:16:27,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:27,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:27,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:16:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:27,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503316366] [2020-10-28 19:16:27,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:27,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205369785] [2020-10-28 19:16:27,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:27,152 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand 5 states. [2020-10-28 19:16:28,703 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:16:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:28,827 INFO L93 Difference]: Finished difference Result 607 states and 973 transitions. [2020-10-28 19:16:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:16:28,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 19:16:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:28,838 INFO L225 Difference]: With dead ends: 607 [2020-10-28 19:16:28,838 INFO L226 Difference]: Without dead ends: 438 [2020-10-28 19:16:28,843 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 [2020-10-28 19:16:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-28 19:16:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 435. [2020-10-28 19:16:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-28 19:16:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 684 transitions. [2020-10-28 19:16:28,940 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 684 transitions. Word has length 69 [2020-10-28 19:16:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:28,941 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 684 transitions. [2020-10-28 19:16:28,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 684 transitions. [2020-10-28 19:16:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:16:28,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:28,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:16:28,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:16:28,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1227978955, now seen corresponding path program 1 times [2020-10-28 19:16:28,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:28,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191027411] [2020-10-28 19:16:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:29,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:29,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:29,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:30,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:33,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:33,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:16:33,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:33,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4756 [2020-10-28 19:16:33,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:33,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:33,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:33,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:16:33,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:34,205 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:34,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:34,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:34,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191027411] [2020-10-28 19:16:34,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:34,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032818596] [2020-10-28 19:16:34,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:34,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:34,271 INFO L87 Difference]: Start difference. First operand 435 states and 684 transitions. Second operand 5 states. [2020-10-28 19:16:35,575 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:16:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:35,704 INFO L93 Difference]: Finished difference Result 1142 states and 1824 transitions. [2020-10-28 19:16:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:16:35,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:16:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:35,711 INFO L225 Difference]: With dead ends: 1142 [2020-10-28 19:16:35,712 INFO L226 Difference]: Without dead ends: 819 [2020-10-28 19:16:35,717 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 [2020-10-28 19:16:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-28 19:16:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 816. [2020-10-28 19:16:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-28 19:16:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1274 transitions. [2020-10-28 19:16:35,829 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1274 transitions. Word has length 70 [2020-10-28 19:16:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:35,831 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1274 transitions. [2020-10-28 19:16:35,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1274 transitions. [2020-10-28 19:16:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:16:35,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:35,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:16:35,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:16:35,846 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2019754633, now seen corresponding path program 1 times [2020-10-28 19:16:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:35,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490655970] [2020-10-28 19:16:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:35,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:36,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:37,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:40,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:40,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:16:40,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:16:40,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:16:40,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:40,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:40,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:16:40,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:16:41,353 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:41,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:41,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:41,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:41,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:16:41,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:41,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:41,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:41,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:41,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:41,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490655970] [2020-10-28 19:16:41,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:41,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458844854] [2020-10-28 19:16:41,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:41,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:41,444 INFO L87 Difference]: Start difference. First operand 816 states and 1274 transitions. Second operand 5 states. [2020-10-28 19:16:42,756 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:16:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:42,960 INFO L93 Difference]: Finished difference Result 2333 states and 3632 transitions. [2020-10-28 19:16:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:16:42,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:16:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:42,973 INFO L225 Difference]: With dead ends: 2333 [2020-10-28 19:16:42,973 INFO L226 Difference]: Without dead ends: 1546 [2020-10-28 19:16:42,976 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 [2020-10-28 19:16:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-28 19:16:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1543. [2020-10-28 19:16:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-28 19:16:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2384 transitions. [2020-10-28 19:16:43,145 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2384 transitions. Word has length 70 [2020-10-28 19:16:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:43,146 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2384 transitions. [2020-10-28 19:16:43,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2384 transitions. [2020-10-28 19:16:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:16:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:43,150 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] [2020-10-28 19:16:43,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:16:43,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash 213130055, now seen corresponding path program 1 times [2020-10-28 19:16:43,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:43,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085761030] [2020-10-28 19:16:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:43,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:46,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:48,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:48,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:16:48,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:16:48,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:48,695 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:48,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:48,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:48,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:48,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:48,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:48,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:16:48,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:48,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:48,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:48,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:16:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:48,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085761030] [2020-10-28 19:16:48,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:48,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:48,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497406313] [2020-10-28 19:16:48,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:48,773 INFO L87 Difference]: Start difference. First operand 1543 states and 2384 transitions. Second operand 5 states. [2020-10-28 19:16:50,194 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:16:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:50,409 INFO L93 Difference]: Finished difference Result 4298 states and 6701 transitions. [2020-10-28 19:16:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:16:50,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 19:16:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:50,428 INFO L225 Difference]: With dead ends: 4298 [2020-10-28 19:16:50,429 INFO L226 Difference]: Without dead ends: 2958 [2020-10-28 19:16:50,434 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 [2020-10-28 19:16:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-10-28 19:16:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2955. [2020-10-28 19:16:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-10-28 19:16:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4535 transitions. [2020-10-28 19:16:50,730 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4535 transitions. Word has length 71 [2020-10-28 19:16:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:50,731 INFO L481 AbstractCegarLoop]: Abstraction has 2955 states and 4535 transitions. [2020-10-28 19:16:50,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4535 transitions. [2020-10-28 19:16:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:16:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:50,738 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] [2020-10-28 19:16:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:16:50,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1131152968, now seen corresponding path program 1 times [2020-10-28 19:16:50,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:50,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92539235] [2020-10-28 19:16:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:50,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:51,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:52,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:52,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:16:52,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:52,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1661 [2020-10-28 19:16:52,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:52,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:52,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:52,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 19:16:52,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:16:52,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:52,812 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:52,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:52,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:52,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:52,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:52,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:52,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:16:52,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:52,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:52,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:52,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92539235] [2020-10-28 19:16:52,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:52,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:52,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283823182] [2020-10-28 19:16:52,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:52,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:52,857 INFO L87 Difference]: Start difference. First operand 2955 states and 4535 transitions. Second operand 4 states. [2020-10-28 19:16:53,210 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:16:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:54,493 INFO L93 Difference]: Finished difference Result 7297 states and 11691 transitions. [2020-10-28 19:16:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:54,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:16:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:54,527 INFO L225 Difference]: With dead ends: 7297 [2020-10-28 19:16:54,527 INFO L226 Difference]: Without dead ends: 5006 [2020-10-28 19:16:54,535 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 [2020-10-28 19:16:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2020-10-28 19:16:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 5003. [2020-10-28 19:16:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5003 states. [2020-10-28 19:16:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 7879 transitions. [2020-10-28 19:16:55,037 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 7879 transitions. Word has length 71 [2020-10-28 19:16:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:55,038 INFO L481 AbstractCegarLoop]: Abstraction has 5003 states and 7879 transitions. [2020-10-28 19:16:55,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 7879 transitions. [2020-10-28 19:16:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:16:55,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:55,085 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] [2020-10-28 19:16:55,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:16:55,085 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 175148071, now seen corresponding path program 1 times [2020-10-28 19:16:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:55,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553725281] [2020-10-28 19:16:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:55,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:55,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:55,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:55,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:58,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:16:58,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3283 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:16:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:58,831 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:58,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:58,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:58,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:58,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:58,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:16:58,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:58,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:58,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:16:58,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553725281] [2020-10-28 19:16:58,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:58,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966021039] [2020-10-28 19:16:58,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:58,890 INFO L87 Difference]: Start difference. First operand 5003 states and 7879 transitions. Second operand 5 states. [2020-10-28 19:17:00,702 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:17:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:01,274 INFO L93 Difference]: Finished difference Result 14171 states and 22429 transitions. [2020-10-28 19:17:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:17:01,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:17:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:01,326 INFO L225 Difference]: With dead ends: 14171 [2020-10-28 19:17:01,327 INFO L226 Difference]: Without dead ends: 9560 [2020-10-28 19:17:01,338 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 [2020-10-28 19:17:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9560 states. [2020-10-28 19:17:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9560 to 9557. [2020-10-28 19:17:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9557 states. [2020-10-28 19:17:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9557 states to 9557 states and 14889 transitions. [2020-10-28 19:17:02,427 INFO L78 Accepts]: Start accepts. Automaton has 9557 states and 14889 transitions. Word has length 74 [2020-10-28 19:17:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:02,428 INFO L481 AbstractCegarLoop]: Abstraction has 9557 states and 14889 transitions. [2020-10-28 19:17:02,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9557 states and 14889 transitions. [2020-10-28 19:17:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:17:02,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:02,441 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] [2020-10-28 19:17:02,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:17:02,441 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash -433399397, now seen corresponding path program 1 times [2020-10-28 19:17:02,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:02,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10120219] [2020-10-28 19:17:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:02,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:02,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:03,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:03,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:05,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:07,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:07,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:17:07,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:17:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:17:07,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:07,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:17:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:17:07,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:07,962 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:07,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:07,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:07,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:07,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:17:07,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:07,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:07,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10120219] [2020-10-28 19:17:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:08,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771896794] [2020-10-28 19:17:08,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:08,014 INFO L87 Difference]: Start difference. First operand 9557 states and 14889 transitions. Second operand 5 states. [2020-10-28 19:17:08,384 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:17:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:10,631 INFO L93 Difference]: Finished difference Result 16969 states and 26466 transitions. [2020-10-28 19:17:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:17:10,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:17:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:10,687 INFO L225 Difference]: With dead ends: 16969 [2020-10-28 19:17:10,688 INFO L226 Difference]: Without dead ends: 12414 [2020-10-28 19:17:10,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:17:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2020-10-28 19:17:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 12411. [2020-10-28 19:17:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2020-10-28 19:17:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 18966 transitions. [2020-10-28 19:17:11,972 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 18966 transitions. Word has length 74 [2020-10-28 19:17:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:11,973 INFO L481 AbstractCegarLoop]: Abstraction has 12411 states and 18966 transitions. [2020-10-28 19:17:11,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 18966 transitions. [2020-10-28 19:17:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:17:11,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:11,991 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] [2020-10-28 19:17:11,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:17:11,991 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash 494135313, now seen corresponding path program 1 times [2020-10-28 19:17:11,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:11,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073893653] [2020-10-28 19:17:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:17,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:17:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:17:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:17,413 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:17,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:17,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073893653] [2020-10-28 19:17:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:17,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:17,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408215366] [2020-10-28 19:17:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:17,454 INFO L87 Difference]: Start difference. First operand 12411 states and 18966 transitions. Second operand 5 states. [2020-10-28 19:17:19,283 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:17:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:20,267 INFO L93 Difference]: Finished difference Result 35870 states and 54801 transitions. [2020-10-28 19:17:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:17:20,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:17:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:20,327 INFO L225 Difference]: With dead ends: 35870 [2020-10-28 19:17:20,328 INFO L226 Difference]: Without dead ends: 23813 [2020-10-28 19:17:20,358 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 [2020-10-28 19:17:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23813 states. [2020-10-28 19:17:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23813 to 23810. [2020-10-28 19:17:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23810 states. [2020-10-28 19:17:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23810 states to 23810 states and 35983 transitions. [2020-10-28 19:17:22,424 INFO L78 Accepts]: Start accepts. Automaton has 23810 states and 35983 transitions. Word has length 74 [2020-10-28 19:17:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:22,424 INFO L481 AbstractCegarLoop]: Abstraction has 23810 states and 35983 transitions. [2020-10-28 19:17:22,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 23810 states and 35983 transitions. [2020-10-28 19:17:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:17:22,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:22,457 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] [2020-10-28 19:17:22,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:17:22,458 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash 677298846, now seen corresponding path program 1 times [2020-10-28 19:17:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843951046] [2020-10-28 19:17:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:22,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:22,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:27,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:27,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:17:27,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:17:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:17:27,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:27,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:17:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:17:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:17:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:27,829 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:27,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:27,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:27,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:27,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:17:27,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:27,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:27,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:27,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:27,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:27,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:27,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843951046] [2020-10-28 19:17:27,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:27,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:17:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654490612] [2020-10-28 19:17:27,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:17:27,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:17:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:17:27,869 INFO L87 Difference]: Start difference. First operand 23810 states and 35983 transitions. Second operand 4 states. [2020-10-28 19:17:28,211 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:17:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:31,596 INFO L93 Difference]: Finished difference Result 57160 states and 88979 transitions. [2020-10-28 19:17:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:17:31,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 19:17:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:31,695 INFO L225 Difference]: With dead ends: 57160 [2020-10-28 19:17:31,695 INFO L226 Difference]: Without dead ends: 37253 [2020-10-28 19:17:31,746 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 [2020-10-28 19:17:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37253 states. [2020-10-28 19:17:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37253 to 37250. [2020-10-28 19:17:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37250 states. [2020-10-28 19:17:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37250 states to 37250 states and 55727 transitions. [2020-10-28 19:17:35,349 INFO L78 Accepts]: Start accepts. Automaton has 37250 states and 55727 transitions. Word has length 75 [2020-10-28 19:17:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:35,349 INFO L481 AbstractCegarLoop]: Abstraction has 37250 states and 55727 transitions. [2020-10-28 19:17:35,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:17:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 37250 states and 55727 transitions. [2020-10-28 19:17:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:17:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:35,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:17:35,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:17:35,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1811444415, now seen corresponding path program 1 times [2020-10-28 19:17:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:35,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93019825] [2020-10-28 19:17:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:35,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:36,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:40,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:17:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:17:40,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:40,811 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:40,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:40,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:40,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:40,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93019825] [2020-10-28 19:17:40,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:40,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121135139] [2020-10-28 19:17:40,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:40,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:40,846 INFO L87 Difference]: Start difference. First operand 37250 states and 55727 transitions. Second operand 5 states. [2020-10-28 19:17:41,213 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:17:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:45,818 INFO L93 Difference]: Finished difference Result 61048 states and 91271 transitions. [2020-10-28 19:17:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:17:45,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:17:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:45,888 INFO L225 Difference]: With dead ends: 61048 [2020-10-28 19:17:45,888 INFO L226 Difference]: Without dead ends: 41829 [2020-10-28 19:17:45,927 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 [2020-10-28 19:17:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41829 states. [2020-10-28 19:17:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41829 to 41826. [2020-10-28 19:17:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41826 states. [2020-10-28 19:17:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41826 states to 41826 states and 61731 transitions. [2020-10-28 19:17:50,077 INFO L78 Accepts]: Start accepts. Automaton has 41826 states and 61731 transitions. Word has length 78 [2020-10-28 19:17:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:50,077 INFO L481 AbstractCegarLoop]: Abstraction has 41826 states and 61731 transitions. [2020-10-28 19:17:50,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 41826 states and 61731 transitions. [2020-10-28 19:17:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:17:50,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:50,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:17:50,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:17:50,103 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1303410491, now seen corresponding path program 1 times [2020-10-28 19:17:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:50,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297884762] [2020-10-28 19:17:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:50,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:50,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:50,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:54,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:17:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:17:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:55,528 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:55,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:55,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:55,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:55,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297884762] [2020-10-28 19:17:55,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:55,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:55,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820908241] [2020-10-28 19:17:55,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:55,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:55,560 INFO L87 Difference]: Start difference. First operand 41826 states and 61731 transitions. Second operand 5 states. [2020-10-28 19:17:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:58,754 INFO L93 Difference]: Finished difference Result 67864 states and 100292 transitions. [2020-10-28 19:17:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:17:58,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:17:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:58,784 INFO L225 Difference]: With dead ends: 67864 [2020-10-28 19:17:58,785 INFO L226 Difference]: Without dead ends: 26677 [2020-10-28 19:17:58,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:17:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2020-10-28 19:18:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26677. [2020-10-28 19:18:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26677 states. [2020-10-28 19:18:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26677 states to 26677 states and 39325 transitions. [2020-10-28 19:18:01,497 INFO L78 Accepts]: Start accepts. Automaton has 26677 states and 39325 transitions. Word has length 78 [2020-10-28 19:18:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:01,498 INFO L481 AbstractCegarLoop]: Abstraction has 26677 states and 39325 transitions. [2020-10-28 19:18:01,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26677 states and 39325 transitions. [2020-10-28 19:18:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:18:01,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:01,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:01,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:18:01,513 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1127866419, now seen corresponding path program 1 times [2020-10-28 19:18:01,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:01,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717515260] [2020-10-28 19:18:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:05,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:06,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:06,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 19:18:06,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:06,927 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:06,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:06,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717515260] [2020-10-28 19:18:06,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:06,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:06,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996217906] [2020-10-28 19:18:06,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:06,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:06,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:06,961 INFO L87 Difference]: Start difference. First operand 26677 states and 39325 transitions. Second operand 5 states. [2020-10-28 19:18:07,330 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:18:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:11,174 INFO L93 Difference]: Finished difference Result 47888 states and 70302 transitions. [2020-10-28 19:18:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:18:11,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:18:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:11,207 INFO L225 Difference]: With dead ends: 47888 [2020-10-28 19:18:11,207 INFO L226 Difference]: Without dead ends: 30631 [2020-10-28 19:18:11,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:18:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30631 states. [2020-10-28 19:18:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30631 to 30628. [2020-10-28 19:18:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30628 states. [2020-10-28 19:18:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30628 states to 30628 states and 44432 transitions. [2020-10-28 19:18:13,892 INFO L78 Accepts]: Start accepts. Automaton has 30628 states and 44432 transitions. Word has length 78 [2020-10-28 19:18:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:13,892 INFO L481 AbstractCegarLoop]: Abstraction has 30628 states and 44432 transitions. [2020-10-28 19:18:13,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30628 states and 44432 transitions. [2020-10-28 19:18:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:18:13,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:13,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:13,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:18:13,909 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 545851375, now seen corresponding path program 1 times [2020-10-28 19:18:13,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:13,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380341359] [2020-10-28 19:18:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:14,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:14,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:14,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:18,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:18:18,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:18:18,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:19,346 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:19,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:18:19,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:19,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:19,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380341359] [2020-10-28 19:18:19,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:19,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:19,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699809751] [2020-10-28 19:18:19,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:19,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:19,395 INFO L87 Difference]: Start difference. First operand 30628 states and 44432 transitions. Second operand 5 states. [2020-10-28 19:18:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:22,033 INFO L93 Difference]: Finished difference Result 50290 states and 73129 transitions. [2020-10-28 19:18:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:22,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:18:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:22,071 INFO L225 Difference]: With dead ends: 50290 [2020-10-28 19:18:22,071 INFO L226 Difference]: Without dead ends: 20582 [2020-10-28 19:18:22,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:18:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20582 states. [2020-10-28 19:18:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20582 to 20580. [2020-10-28 19:18:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20580 states. [2020-10-28 19:18:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 29731 transitions. [2020-10-28 19:18:24,087 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 29731 transitions. Word has length 78 [2020-10-28 19:18:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:24,087 INFO L481 AbstractCegarLoop]: Abstraction has 20580 states and 29731 transitions. [2020-10-28 19:18:24,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 29731 transitions. [2020-10-28 19:18:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:18:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:24,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:24,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:18:24,096 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1289076292, now seen corresponding path program 1 times [2020-10-28 19:18:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:24,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165206975] [2020-10-28 19:18:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:24,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:29,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:29,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:18:29,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:18:29,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:18:29,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:29,514 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:29,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:29,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:29,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:29,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:29,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165206975] [2020-10-28 19:18:29,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:29,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712545085] [2020-10-28 19:18:29,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:29,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:29,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:29,552 INFO L87 Difference]: Start difference. First operand 20580 states and 29731 transitions. Second operand 5 states. [2020-10-28 19:18:29,927 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:18:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:33,098 INFO L93 Difference]: Finished difference Result 36068 states and 52482 transitions. [2020-10-28 19:18:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:18:33,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:18:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:33,124 INFO L225 Difference]: With dead ends: 36068 [2020-10-28 19:18:33,124 INFO L226 Difference]: Without dead ends: 21216 [2020-10-28 19:18:33,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:18:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21216 states. [2020-10-28 19:18:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21216 to 21209. [2020-10-28 19:18:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21209 states. [2020-10-28 19:18:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21209 states to 21209 states and 30434 transitions. [2020-10-28 19:18:35,183 INFO L78 Accepts]: Start accepts. Automaton has 21209 states and 30434 transitions. Word has length 79 [2020-10-28 19:18:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:35,183 INFO L481 AbstractCegarLoop]: Abstraction has 21209 states and 30434 transitions. [2020-10-28 19:18:35,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 21209 states and 30434 transitions. [2020-10-28 19:18:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:18:35,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:35,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:35,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:18:35,193 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:35,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1480497188, now seen corresponding path program 1 times [2020-10-28 19:18:35,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:35,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084710307] [2020-10-28 19:18:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:36,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:18:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 19:18:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:18:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:37,166 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:37,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:37,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:37,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084710307] [2020-10-28 19:18:37,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:37,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796376940] [2020-10-28 19:18:37,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:37,201 INFO L87 Difference]: Start difference. First operand 21209 states and 30434 transitions. Second operand 4 states. [2020-10-28 19:18:38,801 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:18:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:40,535 INFO L93 Difference]: Finished difference Result 39274 states and 57699 transitions. [2020-10-28 19:18:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:40,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:18:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:40,579 INFO L225 Difference]: With dead ends: 39274 [2020-10-28 19:18:40,580 INFO L226 Difference]: Without dead ends: 26964 [2020-10-28 19:18:40,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26964 states. [2020-10-28 19:18:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26964 to 26255. [2020-10-28 19:18:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26255 states. [2020-10-28 19:18:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26255 states to 26255 states and 37822 transitions. [2020-10-28 19:18:43,071 INFO L78 Accepts]: Start accepts. Automaton has 26255 states and 37822 transitions. Word has length 79 [2020-10-28 19:18:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:43,071 INFO L481 AbstractCegarLoop]: Abstraction has 26255 states and 37822 transitions. [2020-10-28 19:18:43,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26255 states and 37822 transitions. [2020-10-28 19:18:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:18:43,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:43,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:43,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:18:43,083 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 429011970, now seen corresponding path program 1 times [2020-10-28 19:18:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:43,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400683605] [2020-10-28 19:18:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:43,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:43,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:43,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:48,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:18:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 19:18:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:48,486 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:48,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:48,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:48,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:48,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:48,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400683605] [2020-10-28 19:18:48,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:48,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:48,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265271144] [2020-10-28 19:18:48,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:48,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:48,514 INFO L87 Difference]: Start difference. First operand 26255 states and 37822 transitions. Second operand 5 states. [2020-10-28 19:18:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:51,342 INFO L93 Difference]: Finished difference Result 28925 states and 41413 transitions. [2020-10-28 19:18:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:51,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:18:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:51,365 INFO L225 Difference]: With dead ends: 28925 [2020-10-28 19:18:51,366 INFO L226 Difference]: Without dead ends: 23192 [2020-10-28 19:18:51,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:18:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23192 states. [2020-10-28 19:18:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23192 to 23192. [2020-10-28 19:18:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23192 states. [2020-10-28 19:18:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23192 states to 23192 states and 33489 transitions. [2020-10-28 19:18:53,543 INFO L78 Accepts]: Start accepts. Automaton has 23192 states and 33489 transitions. Word has length 79 [2020-10-28 19:18:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:53,543 INFO L481 AbstractCegarLoop]: Abstraction has 23192 states and 33489 transitions. [2020-10-28 19:18:53,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 23192 states and 33489 transitions. [2020-10-28 19:18:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:18:53,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:53,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:53,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:18:53,555 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:53,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1586640498, now seen corresponding path program 1 times [2020-10-28 19:18:53,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:53,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757795387] [2020-10-28 19:18:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:53,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:53,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:53,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4394 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:18:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:18:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:18:57,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:58,334 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:18:58,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:58,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:58,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:58,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757795387] [2020-10-28 19:18:58,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:58,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:58,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787026342] [2020-10-28 19:18:58,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:58,362 INFO L87 Difference]: Start difference. First operand 23192 states and 33489 transitions. Second operand 4 states. [2020-10-28 19:18:58,751 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:19:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:02,064 INFO L93 Difference]: Finished difference Result 40745 states and 59925 transitions. [2020-10-28 19:19:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:19:02,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:19:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:02,091 INFO L225 Difference]: With dead ends: 40745 [2020-10-28 19:19:02,092 INFO L226 Difference]: Without dead ends: 24881 [2020-10-28 19:19:02,105 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 [2020-10-28 19:19:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24881 states. [2020-10-28 19:19:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24881 to 24679. [2020-10-28 19:19:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24679 states. [2020-10-28 19:19:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24679 states to 24679 states and 36273 transitions. [2020-10-28 19:19:04,488 INFO L78 Accepts]: Start accepts. Automaton has 24679 states and 36273 transitions. Word has length 80 [2020-10-28 19:19:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:04,489 INFO L481 AbstractCegarLoop]: Abstraction has 24679 states and 36273 transitions. [2020-10-28 19:19:04,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:19:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24679 states and 36273 transitions. [2020-10-28 19:19:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:19:04,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:04,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:04,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:19:04,493 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2013763947, now seen corresponding path program 1 times [2020-10-28 19:19:04,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:04,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709936479] [2020-10-28 19:19:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:07,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2593 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:19:07,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:07,469 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:19:07,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:07,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:07,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:07,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:07,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709936479] [2020-10-28 19:19:07,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:07,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070959485] [2020-10-28 19:19:07,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:07,496 INFO L87 Difference]: Start difference. First operand 24679 states and 36273 transitions. Second operand 4 states. [2020-10-28 19:19:07,871 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:19:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:11,680 INFO L93 Difference]: Finished difference Result 43036 states and 64106 transitions. [2020-10-28 19:19:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:19:11,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:19:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:11,720 INFO L225 Difference]: With dead ends: 43036 [2020-10-28 19:19:11,720 INFO L226 Difference]: Without dead ends: 29900 [2020-10-28 19:19:11,735 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 [2020-10-28 19:19:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29900 states. [2020-10-28 19:19:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29900 to 29897. [2020-10-28 19:19:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29897 states. [2020-10-28 19:19:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29897 states to 29897 states and 44309 transitions. [2020-10-28 19:19:14,601 INFO L78 Accepts]: Start accepts. Automaton has 29897 states and 44309 transitions. Word has length 83 [2020-10-28 19:19:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:14,601 INFO L481 AbstractCegarLoop]: Abstraction has 29897 states and 44309 transitions. [2020-10-28 19:19:14,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:19:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 29897 states and 44309 transitions. [2020-10-28 19:19:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:19:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:14,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:14,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:19:14,605 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -520062856, now seen corresponding path program 1 times [2020-10-28 19:19:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:14,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127461594] [2020-10-28 19:19:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:14,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:15,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2452 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 19:19:17,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 19:19:17,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:17,420 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:19:17,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:17,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:17,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:17,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:17,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:19:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:17,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127461594] [2020-10-28 19:19:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925593858] [2020-10-28 19:19:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:17,454 INFO L87 Difference]: Start difference. First operand 29897 states and 44309 transitions. Second operand 4 states. [2020-10-28 19:19:18,577 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:19:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:22,479 INFO L93 Difference]: Finished difference Result 67147 states and 100309 transitions. [2020-10-28 19:19:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:19:22,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:19:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:22,532 INFO L225 Difference]: With dead ends: 67147 [2020-10-28 19:19:22,533 INFO L226 Difference]: Without dead ends: 39161 [2020-10-28 19:19:22,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:19:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39161 states. [2020-10-28 19:19:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39161 to 38379. [2020-10-28 19:19:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38379 states. [2020-10-28 19:19:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38379 states to 38379 states and 56649 transitions. [2020-10-28 19:19:26,650 INFO L78 Accepts]: Start accepts. Automaton has 38379 states and 56649 transitions. Word has length 83 [2020-10-28 19:19:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:26,651 INFO L481 AbstractCegarLoop]: Abstraction has 38379 states and 56649 transitions. [2020-10-28 19:19:26,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:19:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38379 states and 56649 transitions. [2020-10-28 19:19:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:19:26,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:26,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:26,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 19:19:26,654 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1483652579, now seen corresponding path program 1 times [2020-10-28 19:19:26,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:26,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918183429] [2020-10-28 19:19:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:26,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4353 [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:31,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:19:31,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 19:19:31,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:31,380 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:19:31,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:31,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:31,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918183429] [2020-10-28 19:19:31,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:31,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:31,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519967873] [2020-10-28 19:19:31,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:31,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:31,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:31,407 INFO L87 Difference]: Start difference. First operand 38379 states and 56649 transitions. Second operand 4 states. [2020-10-28 19:19:31,793 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:19:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:37,582 INFO L93 Difference]: Finished difference Result 70369 states and 106485 transitions. [2020-10-28 19:19:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:19:37,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-28 19:19:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:37,658 INFO L225 Difference]: With dead ends: 70369 [2020-10-28 19:19:37,658 INFO L226 Difference]: Without dead ends: 49263 [2020-10-28 19:19:37,688 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 [2020-10-28 19:19:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49263 states. [2020-10-28 19:19:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49263 to 49260. [2020-10-28 19:19:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49260 states. [2020-10-28 19:19:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 73843 transitions. [2020-10-28 19:19:43,003 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 73843 transitions. Word has length 87 [2020-10-28 19:19:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:43,003 INFO L481 AbstractCegarLoop]: Abstraction has 49260 states and 73843 transitions. [2020-10-28 19:19:43,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:19:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 73843 transitions. [2020-10-28 19:19:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:19:43,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:43,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:43,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 19:19:43,005 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash -861180899, now seen corresponding path program 1 times [2020-10-28 19:19:43,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:43,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039438379] [2020-10-28 19:19:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:43,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4505 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:19:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 19:19:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:47,866 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:19:47,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:47,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:47,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:47,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:47,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:47,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039438379] [2020-10-28 19:19:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809531976] [2020-10-28 19:19:47,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:47,900 INFO L87 Difference]: Start difference. First operand 49260 states and 73843 transitions. Second operand 4 states.