/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:51:15,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:51:15,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:51:15,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:51:15,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:51:15,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:51:15,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:51:15,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:51:15,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:51:15,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:51:15,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:51:15,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:51:15,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:51:15,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:51:15,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:51:15,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:51:15,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:51:15,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:51:15,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:51:15,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:51:15,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:51:15,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:51:15,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:51:15,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:51:15,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:51:15,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:51:15,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:51:15,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:51:15,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:51:15,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:51:15,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:51:15,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:51:15,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:51:15,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:51:15,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:51:15,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:51:15,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:51:15,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:51:15,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:51:15,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:51:15,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:51:15,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:51:15,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:51:15,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:51:15,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:51:15,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:51:15,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:51:15,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:51:15,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:51:15,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:51:15,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:51:15,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:51:15,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:51:15,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:51:15,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:51:15,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:51:15,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:51:15,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:51:15,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:51:15,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:51:15,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:51:15,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:51:15,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:51:15,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:51:15,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:51:15,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:51:15,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:51:16,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:51:16,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:51:16,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:51:16,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:51:16,076 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:51:16,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:51:16,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/765240ea6/6aa9d0cdc48b49b6a7153c2b4cd0550d/FLAG99776e3cb [2020-10-27 05:51:16,955 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:51:16,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:51:16,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/765240ea6/6aa9d0cdc48b49b6a7153c2b4cd0550d/FLAG99776e3cb [2020-10-27 05:51:17,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/765240ea6/6aa9d0cdc48b49b6a7153c2b4cd0550d [2020-10-27 05:51:17,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:51:17,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:51:17,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:51:17,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:51:17,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:51:17,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5750c561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17, skipping insertion in model container [2020-10-27 05:51:17,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:51:17,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:51:17,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:51:17,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:51:17,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:51:17,832 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:51:17,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17 WrapperNode [2020-10-27 05:51:17,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:51:17,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:51:17,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:51:17,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:51:17,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... [2020-10-27 05:51:17,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:51:17,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:51:17,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:51:17,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:51:17,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:51:18,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:51:18,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:51:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:51:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:51:18,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:51:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:51:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:51:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:51:18,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:51:18,023 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:51:18,024 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:51:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:51:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:51:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:51:18,927 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:51:18,928 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:51:18,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:51:18 BoogieIcfgContainer [2020-10-27 05:51:18,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:51:18,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:51:18,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:51:18,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:51:18,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:51:17" (1/3) ... [2020-10-27 05:51:18,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b743204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:51:18, skipping insertion in model container [2020-10-27 05:51:18,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:17" (2/3) ... [2020-10-27 05:51:18,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b743204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:51:18, skipping insertion in model container [2020-10-27 05:51:18,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:51:18" (3/3) ... [2020-10-27 05:51:18,943 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:51:18,957 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:51:18,963 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:51:18,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:51:19,014 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:51:19,014 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:51:19,014 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:51:19,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:51:19,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:51:19,015 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:51:19,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:51:19,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:51:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-27 05:51:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:51:19,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:19,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:19,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash -144079420, now seen corresponding path program 1 times [2020-10-27 05:51:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:19,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186871828] [2020-10-27 05:51:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:19,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:19,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:21,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:24,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:24,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:51:24,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:51:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 05:51:24,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:51:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:51:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:51:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:51:24,870 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:24,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:24,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:51:24,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:24,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:24,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:24,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186871828] [2020-10-27 05:51:24,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:24,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:51:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455441153] [2020-10-27 05:51:24,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:51:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:51:25,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:51:25,018 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 8 states. [2020-10-27 05:51:25,514 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:51:26,931 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:51:27,216 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:27,522 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:51:27,859 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:51:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:27,931 INFO L93 Difference]: Finished difference Result 777 states and 1229 transitions. [2020-10-27 05:51:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:51:27,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-27 05:51:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:27,957 INFO L225 Difference]: With dead ends: 777 [2020-10-27 05:51:27,957 INFO L226 Difference]: Without dead ends: 645 [2020-10-27 05:51:27,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:51:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2020-10-27 05:51:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 238. [2020-10-27 05:51:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-27 05:51:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-27 05:51:28,064 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 66 [2020-10-27 05:51:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:28,066 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-27 05:51:28,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:51:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-27 05:51:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:51:28,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:28,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:28,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:51:28,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash -746312999, now seen corresponding path program 1 times [2020-10-27 05:51:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:28,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539494698] [2020-10-27 05:51:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:28,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:28,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:30,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:30,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:51:30,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:51:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2395 [2020-10-27 05:51:30,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:51:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:51:30,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:51:30,950 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:30,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:30,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:30,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:30,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:51:30,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:51:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539494698] [2020-10-27 05:51:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:51:31,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071323338] [2020-10-27 05:51:31,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:51:31,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:51:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:51:31,019 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-27 05:51:31,324 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:32,280 INFO L93 Difference]: Finished difference Result 604 states and 935 transitions. [2020-10-27 05:51:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:51:32,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:51:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:32,290 INFO L225 Difference]: With dead ends: 604 [2020-10-27 05:51:32,290 INFO L226 Difference]: Without dead ends: 405 [2020-10-27 05:51:32,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-27 05:51:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2020-10-27 05:51:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-27 05:51:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 615 transitions. [2020-10-27 05:51:32,360 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 615 transitions. Word has length 67 [2020-10-27 05:51:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:32,361 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 615 transitions. [2020-10-27 05:51:32,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:51:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 615 transitions. [2020-10-27 05:51:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:51:32,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:32,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:32,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:51:32,363 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1387025450, now seen corresponding path program 1 times [2020-10-27 05:51:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903605542] [2020-10-27 05:51:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:32,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:33,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:33,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:51:33,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:51:33,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-27 05:51:33,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:51:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:51:33,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:33,947 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:33,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:33,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:33,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:33,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:33,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:33,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:51:33,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:33,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:33,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903605542] [2020-10-27 05:51:33,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:33,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:51:34,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242093295] [2020-10-27 05:51:34,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:51:34,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:51:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:51:34,002 INFO L87 Difference]: Start difference. First operand 402 states and 615 transitions. Second operand 4 states. [2020-10-27 05:51:34,337 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:35,222 INFO L93 Difference]: Finished difference Result 1064 states and 1663 transitions. [2020-10-27 05:51:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:51:35,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 05:51:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:35,230 INFO L225 Difference]: With dead ends: 1064 [2020-10-27 05:51:35,230 INFO L226 Difference]: Without dead ends: 701 [2020-10-27 05:51:35,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-27 05:51:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2020-10-27 05:51:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-27 05:51:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1081 transitions. [2020-10-27 05:51:35,290 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1081 transitions. Word has length 68 [2020-10-27 05:51:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:35,292 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 1081 transitions. [2020-10-27 05:51:35,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:51:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1081 transitions. [2020-10-27 05:51:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:51:35,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:35,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:35,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:51:35,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash -396877746, now seen corresponding path program 1 times [2020-10-27 05:51:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:35,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131912478] [2020-10-27 05:51:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:35,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:36,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:36,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:51:36,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:51:36,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-27 05:51:36,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:36,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:51:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:51:36,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:36,374 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:36,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:36,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:36,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:51:36,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:36,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:36,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131912478] [2020-10-27 05:51:36,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:36,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:51:36,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743635513] [2020-10-27 05:51:36,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:51:36,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:36,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:51:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:51:36,427 INFO L87 Difference]: Start difference. First operand 698 states and 1081 transitions. Second operand 4 states. [2020-10-27 05:51:36,739 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:37,713 INFO L93 Difference]: Finished difference Result 1888 states and 2957 transitions. [2020-10-27 05:51:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:51:37,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:51:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:37,724 INFO L225 Difference]: With dead ends: 1888 [2020-10-27 05:51:37,724 INFO L226 Difference]: Without dead ends: 1229 [2020-10-27 05:51:37,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-10-27 05:51:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1226. [2020-10-27 05:51:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-10-27 05:51:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1905 transitions. [2020-10-27 05:51:37,848 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1905 transitions. Word has length 69 [2020-10-27 05:51:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:37,849 INFO L481 AbstractCegarLoop]: Abstraction has 1226 states and 1905 transitions. [2020-10-27 05:51:37,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:51:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1905 transitions. [2020-10-27 05:51:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:51:37,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:37,851 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] [2020-10-27 05:51:37,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:51:37,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash 664470761, now seen corresponding path program 1 times [2020-10-27 05:51:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:37,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232566279] [2020-10-27 05:51:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:37,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:38,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:38,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:51:38,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:51:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 05:51:38,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:51:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:51:38,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:38,504 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:38,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:38,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:38,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:38,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:51:38,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:38,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232566279] [2020-10-27 05:51:38,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:38,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:51:38,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015585711] [2020-10-27 05:51:38,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:51:38,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:38,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:51:38,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:51:38,559 INFO L87 Difference]: Start difference. First operand 1226 states and 1905 transitions. Second operand 4 states. [2020-10-27 05:51:38,916 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:39,771 INFO L93 Difference]: Finished difference Result 3344 states and 5221 transitions. [2020-10-27 05:51:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:51:39,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 05:51:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:39,786 INFO L225 Difference]: With dead ends: 3344 [2020-10-27 05:51:39,786 INFO L226 Difference]: Without dead ends: 2157 [2020-10-27 05:51:39,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2020-10-27 05:51:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2154. [2020-10-27 05:51:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-10-27 05:51:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3337 transitions. [2020-10-27 05:51:39,931 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3337 transitions. Word has length 70 [2020-10-27 05:51:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:39,931 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 3337 transitions. [2020-10-27 05:51:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:51:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3337 transitions. [2020-10-27 05:51:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:51:39,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:39,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:39,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:51:39,933 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1457190185, now seen corresponding path program 1 times [2020-10-27 05:51:39,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:39,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49297720] [2020-10-27 05:51:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:40,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:40,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:51:40,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:51:40,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-27 05:51:40,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:51:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:51:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:51:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:41,384 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:41,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:41,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:41,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:41,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:41,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:51:41,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:41,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:41,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49297720] [2020-10-27 05:51:41,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:41,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:51:41,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287161855] [2020-10-27 05:51:41,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:51:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:51:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:51:41,469 INFO L87 Difference]: Start difference. First operand 2154 states and 3337 transitions. Second operand 8 states. [2020-10-27 05:51:42,595 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:51:42,887 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:51:43,188 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:51:43,512 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:51:43,829 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:51:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:45,387 INFO L93 Difference]: Finished difference Result 11289 states and 17459 transitions. [2020-10-27 05:51:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:51:45,388 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 05:51:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:45,438 INFO L225 Difference]: With dead ends: 11289 [2020-10-27 05:51:45,438 INFO L226 Difference]: Without dead ends: 9174 [2020-10-27 05:51:45,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:51:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9174 states. [2020-10-27 05:51:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9174 to 9162. [2020-10-27 05:51:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9162 states. [2020-10-27 05:51:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9162 states to 9162 states and 14121 transitions. [2020-10-27 05:51:46,099 INFO L78 Accepts]: Start accepts. Automaton has 9162 states and 14121 transitions. Word has length 71 [2020-10-27 05:51:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:46,099 INFO L481 AbstractCegarLoop]: Abstraction has 9162 states and 14121 transitions. [2020-10-27 05:51:46,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:51:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 9162 states and 14121 transitions. [2020-10-27 05:51:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:51:46,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:46,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:46,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:51:46,108 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -588936793, now seen corresponding path program 1 times [2020-10-27 05:51:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:46,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340085120] [2020-10-27 05:51:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:46,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:46,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:51:46,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:51:46,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 05:51:46,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:51:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:51:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:46,819 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:46,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:46,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:46,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:46,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340085120] [2020-10-27 05:51:46,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:46,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:51:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485681644] [2020-10-27 05:51:46,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:51:46,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:51:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:51:46,867 INFO L87 Difference]: Start difference. First operand 9162 states and 14121 transitions. Second operand 4 states. [2020-10-27 05:51:47,181 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:51:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:48,933 INFO L93 Difference]: Finished difference Result 24688 states and 37901 transitions. [2020-10-27 05:51:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:51:48,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 05:51:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:49,014 INFO L225 Difference]: With dead ends: 24688 [2020-10-27 05:51:49,015 INFO L226 Difference]: Without dead ends: 15565 [2020-10-27 05:51:49,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15565 states. [2020-10-27 05:51:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15565 to 15562. [2020-10-27 05:51:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15562 states. [2020-10-27 05:51:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15562 states to 15562 states and 23657 transitions. [2020-10-27 05:51:50,339 INFO L78 Accepts]: Start accepts. Automaton has 15562 states and 23657 transitions. Word has length 72 [2020-10-27 05:51:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:50,340 INFO L481 AbstractCegarLoop]: Abstraction has 15562 states and 23657 transitions. [2020-10-27 05:51:50,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:51:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15562 states and 23657 transitions. [2020-10-27 05:51:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:51:50,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:50,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:50,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:51:50,342 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash -977595442, now seen corresponding path program 1 times [2020-10-27 05:51:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:50,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421544690] [2020-10-27 05:51:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:50,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:50,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:51:50,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:51:50,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-27 05:51:50,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:51:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:51:50,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:51:50,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:51,232 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:51,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:51,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:51,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:51,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:51,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:51:51,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:51:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:51:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:51,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421544690] [2020-10-27 05:51:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:51:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530601325] [2020-10-27 05:51:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:51:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:51:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:51:51,312 INFO L87 Difference]: Start difference. First operand 15562 states and 23657 transitions. Second operand 6 states. [2020-10-27 05:51:51,648 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:51:53,110 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:51:54,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:54,228 INFO L93 Difference]: Finished difference Result 43888 states and 66797 transitions. [2020-10-27 05:51:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:51:54,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:51:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:54,306 INFO L225 Difference]: With dead ends: 43888 [2020-10-27 05:51:54,306 INFO L226 Difference]: Without dead ends: 28365 [2020-10-27 05:51:54,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:51:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28365 states. [2020-10-27 05:51:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28365 to 28362. [2020-10-27 05:51:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28362 states. [2020-10-27 05:51:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28362 states to 28362 states and 42889 transitions. [2020-10-27 05:51:56,430 INFO L78 Accepts]: Start accepts. Automaton has 28362 states and 42889 transitions. Word has length 73 [2020-10-27 05:51:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:56,431 INFO L481 AbstractCegarLoop]: Abstraction has 28362 states and 42889 transitions. [2020-10-27 05:51:56,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:51:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28362 states and 42889 transitions. [2020-10-27 05:51:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:51:56,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:56,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:56,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:51:56,432 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1333556343, now seen corresponding path program 1 times [2020-10-27 05:51:56,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:56,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912392320] [2020-10-27 05:51:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:56,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:56,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:51:56,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 05:51:56,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:51:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 05:51:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:51:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:57,004 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:51:57,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:57,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:57,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:57,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:51:57,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:51:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:51:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:51:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:51:57,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912392320] [2020-10-27 05:51:57,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:57,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:51:57,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803085139] [2020-10-27 05:51:57,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:51:57,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:51:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:51:57,054 INFO L87 Difference]: Start difference. First operand 28362 states and 42889 transitions. Second operand 5 states. [2020-10-27 05:52:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:52:01,062 INFO L93 Difference]: Finished difference Result 57837 states and 86891 transitions. [2020-10-27 05:52:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:52:01,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:52:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:52:01,191 INFO L225 Difference]: With dead ends: 57837 [2020-10-27 05:52:01,192 INFO L226 Difference]: Without dead ends: 57834 [2020-10-27 05:52:01,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:52:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57834 states. [2020-10-27 05:52:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57834 to 29514. [2020-10-27 05:52:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29514 states. [2020-10-27 05:52:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29514 states to 29514 states and 44041 transitions. [2020-10-27 05:52:03,631 INFO L78 Accepts]: Start accepts. Automaton has 29514 states and 44041 transitions. Word has length 73 [2020-10-27 05:52:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:52:03,632 INFO L481 AbstractCegarLoop]: Abstraction has 29514 states and 44041 transitions. [2020-10-27 05:52:03,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:52:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 29514 states and 44041 transitions. [2020-10-27 05:52:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:52:03,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:52:03,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:52:03,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:52:03,634 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:52:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:52:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1907335397, now seen corresponding path program 1 times [2020-10-27 05:52:03,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:52:03,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629262937] [2020-10-27 05:52:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:52:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:03,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:03,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:03,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:52:03,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:52:03,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 05:52:03,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:52:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:52:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:52:03,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:52:04,199 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:52:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:52:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:04,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:04,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:52:04,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:52:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:52:04,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:52:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:52:04,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:52:04,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:52:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:52:04,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629262937] [2020-10-27 05:52:04,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:52:04,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:52:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836667988] [2020-10-27 05:52:04,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:52:04,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:52:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:52:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:52:04,278 INFO L87 Difference]: Start difference. First operand 29514 states and 44041 transitions. Second operand 4 states. [2020-10-27 05:52:04,710 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:52:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:52:07,607 INFO L93 Difference]: Finished difference Result 66594 states and 99183 transitions. [2020-10-27 05:52:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:52:07,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-27 05:52:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:52:07,689 INFO L225 Difference]: With dead ends: 66594 [2020-10-27 05:52:07,689 INFO L226 Difference]: Without dead ends: 37119 [2020-10-27 05:52:07,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:52:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37119 states. [2020-10-27 05:52:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37119 to 36972. [2020-10-27 05:52:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36972 states. [2020-10-27 05:52:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36972 states to 36972 states and 54747 transitions. [2020-10-27 05:52:10,673 INFO L78 Accepts]: Start accepts. Automaton has 36972 states and 54747 transitions. Word has length 74 [2020-10-27 05:52:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:52:10,673 INFO L481 AbstractCegarLoop]: Abstraction has 36972 states and 54747 transitions. [2020-10-27 05:52:10,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:52:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 36972 states and 54747 transitions. [2020-10-27 05:52:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:52:10,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:52:10,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:52:10,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:52:10,694 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:52:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:52:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 861599860, now seen corresponding path program 1 times [2020-10-27 05:52:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:52:10,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259599494] [2020-10-27 05:52:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:52:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:10,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:10,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:10,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:11,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:15,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:15,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:52:15,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:52:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:52:16,377 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:52:16,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:52:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:16,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:16,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:52:16,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:52:16,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:52:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:52:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:52:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259599494] [2020-10-27 05:52:16,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:52:16,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:52:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378523652] [2020-10-27 05:52:16,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:52:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:52:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:52:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:52:16,444 INFO L87 Difference]: Start difference. First operand 36972 states and 54747 transitions. Second operand 10 states. [2020-10-27 05:52:16,759 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:52:22,143 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:52:22,763 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:52:23,252 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:52:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:52:43,282 INFO L93 Difference]: Finished difference Result 321160 states and 475922 transitions. [2020-10-27 05:52:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:52:43,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2020-10-27 05:52:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:52:44,135 INFO L225 Difference]: With dead ends: 321160 [2020-10-27 05:52:44,135 INFO L226 Difference]: Without dead ends: 287749 [2020-10-27 05:52:44,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:52:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287749 states. [2020-10-27 05:52:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287749 to 102604. [2020-10-27 05:52:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102604 states. [2020-10-27 05:52:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102604 states to 102604 states and 152167 transitions. [2020-10-27 05:52:55,605 INFO L78 Accepts]: Start accepts. Automaton has 102604 states and 152167 transitions. Word has length 101 [2020-10-27 05:52:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:52:55,606 INFO L481 AbstractCegarLoop]: Abstraction has 102604 states and 152167 transitions. [2020-10-27 05:52:55,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:52:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 102604 states and 152167 transitions. [2020-10-27 05:52:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:52:55,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:52:55,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:52:55,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:52:55,628 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:52:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:52:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1088320545, now seen corresponding path program 1 times [2020-10-27 05:52:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:52:55,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923432381] [2020-10-27 05:52:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:52:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:52:55,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:56,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:52:57,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:00,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:00,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:00,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:53:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:53:00,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:53:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:53:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:01,167 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:53:01,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:01,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:01,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:01,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:01,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:53:01,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:01,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:01,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923432381] [2020-10-27 05:53:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:53:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:53:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975374862] [2020-10-27 05:53:01,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:53:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:53:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:53:01,266 INFO L87 Difference]: Start difference. First operand 102604 states and 152167 transitions. Second operand 11 states. [2020-10-27 05:53:01,671 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:53:08,746 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:53:09,298 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:53:09,822 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:53:23,050 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:53:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:53:37,992 INFO L93 Difference]: Finished difference Result 394438 states and 581065 transitions. [2020-10-27 05:53:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 05:53:37,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-27 05:53:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:53:38,815 INFO L225 Difference]: With dead ends: 394438 [2020-10-27 05:53:38,816 INFO L226 Difference]: Without dead ends: 299923 [2020-10-27 05:53:38,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=372, Invalid=1350, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:53:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299923 states. [2020-10-27 05:53:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299923 to 103116. [2020-10-27 05:53:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103116 states. [2020-10-27 05:53:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103116 states to 103116 states and 152807 transitions. [2020-10-27 05:53:51,541 INFO L78 Accepts]: Start accepts. Automaton has 103116 states and 152807 transitions. Word has length 101 [2020-10-27 05:53:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:53:51,542 INFO L481 AbstractCegarLoop]: Abstraction has 103116 states and 152807 transitions. [2020-10-27 05:53:51,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:53:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103116 states and 152807 transitions. [2020-10-27 05:53:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 05:53:51,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:53:51,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:53:51,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:53:51,564 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:53:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:53:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2007509221, now seen corresponding path program 1 times [2020-10-27 05:53:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:53:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541456177] [2020-10-27 05:53:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:53:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:51,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:51,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:53:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:53:53,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 05:53:53,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:53:53,689 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:53:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:53:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:53:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:53:53,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:53:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:53:53,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:53:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:53:53,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:53:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:53:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:53:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:53:53,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:53:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:53:53,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541456177] [2020-10-27 05:53:53,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:53:53,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:53:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35170938] [2020-10-27 05:53:53,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:53:53,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:53:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:53:53,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:53:53,809 INFO L87 Difference]: Start difference. First operand 103116 states and 152807 transitions. Second operand 11 states. [2020-10-27 05:53:54,253 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:54:01,890 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:54:02,553 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:54:03,133 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:54:23,543 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:54:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:54:47,357 INFO L93 Difference]: Finished difference Result 525106 states and 774433 transitions. [2020-10-27 05:54:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 05:54:47,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-27 05:54:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:54:48,456 INFO L225 Difference]: With dead ends: 525106 [2020-10-27 05:54:48,456 INFO L226 Difference]: Without dead ends: 422031 [2020-10-27 05:54:48,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=491, Invalid=1861, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 05:54:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422031 states.