/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:34:21,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:34:21,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:34:21,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:34:21,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:34:21,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:34:21,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:34:21,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:34:21,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:34:21,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:34:21,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:34:21,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:34:21,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:34:21,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:34:21,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:34:21,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:34:21,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:34:21,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:34:21,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:34:21,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:34:21,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:34:21,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:34:21,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:34:21,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:34:21,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:34:21,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:34:21,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:34:21,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:34:21,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:34:21,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:34:21,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:34:21,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:34:21,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:34:21,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:34:21,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:34:21,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:34:21,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:34:21,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:34:21,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:34:21,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:34:21,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:34:21,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:34:21,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:34:21,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:34:21,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:34:21,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:34:21,974 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:34:21,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:34:21,975 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:34:21,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:34:21,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:34:21,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:34:21,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:34:21,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:34:21,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:34:21,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:34:21,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:34:21,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:34:21,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:34:21,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:34:21,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:34:21,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:34:21,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:34:21,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:34:21,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:34:21,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:34:21,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:34:21,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:34:21,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:34:21,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:34:21,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:34:21,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:34:22,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:34:22,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:34:22,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:34:22,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:34:22,453 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:34:22,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:34:22,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89de642e4/c21ffad61c4e48e5b36a802cde0dfee8/FLAG3b753f4f4 [2020-10-28 00:34:23,413 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:34:23,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:34:23,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89de642e4/c21ffad61c4e48e5b36a802cde0dfee8/FLAG3b753f4f4 [2020-10-28 00:34:23,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89de642e4/c21ffad61c4e48e5b36a802cde0dfee8 [2020-10-28 00:34:23,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:34:23,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:34:23,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:34:23,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:34:23,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:34:23,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:34:23" (1/1) ... [2020-10-28 00:34:23,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe424fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:23, skipping insertion in model container [2020-10-28 00:34:23,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:34:23" (1/1) ... [2020-10-28 00:34:23,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:34:23,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:34:25,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:34:25,221 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:34:25,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:34:25,671 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:34:25,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25 WrapperNode [2020-10-28 00:34:25,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:34:25,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:34:25,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:34:25,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:34:25,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... [2020-10-28 00:34:25,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:34:25,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:34:25,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:34:25,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:34:25,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:34:25,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:34:25,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:34:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:34:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:34:25,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:34:25,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:34:25,957 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:34:25,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:34:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:34:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:34:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:34:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:34:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:34:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:34:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:34:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:34:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:34:25,959 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:34:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:34:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:34:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:34:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:34:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:34:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:34:29,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:34:29,985 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:34:29,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:34:29 BoogieIcfgContainer [2020-10-28 00:34:29,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:34:29,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:34:29,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:34:29,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:34:29,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:34:23" (1/3) ... [2020-10-28 00:34:29,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4906afc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:34:29, skipping insertion in model container [2020-10-28 00:34:29,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:25" (2/3) ... [2020-10-28 00:34:29,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4906afc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:34:29, skipping insertion in model container [2020-10-28 00:34:29,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:34:29" (3/3) ... [2020-10-28 00:34:29,999 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:34:30,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:34:30,018 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:34:30,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:34:30,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:34:30,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:34:30,078 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:34:30,078 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:34:30,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:34:30,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:34:30,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:34:30,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:34:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states. [2020-10-28 00:34:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:34:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:30,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:34:30,180 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:30,187 INFO L82 PathProgramCache]: Analyzing trace with hash 471360347, now seen corresponding path program 1 times [2020-10-28 00:34:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:30,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344094741] [2020-10-28 00:34:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:31,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:32,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:33,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:33,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:35,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:35,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:36,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:36,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:34:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:34:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5164 [2020-10-28 00:34:36,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:34:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 00:34:36,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 00:34:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:34:37,642 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:34:37,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:37,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:37,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:37,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:37,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:34:37,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:37,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:37,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:37,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:34:37,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344094741] [2020-10-28 00:34:37,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:37,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:34:37,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275533167] [2020-10-28 00:34:37,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:34:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:34:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:34:37,959 INFO L87 Difference]: Start difference. First operand 812 states. Second operand 4 states. [2020-10-28 00:34:39,509 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 00:34:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:34:47,240 INFO L93 Difference]: Finished difference Result 1533 states and 2691 transitions. [2020-10-28 00:34:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:34:47,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 00:34:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:34:47,274 INFO L225 Difference]: With dead ends: 1533 [2020-10-28 00:34:47,274 INFO L226 Difference]: Without dead ends: 1313 [2020-10-28 00:34:47,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:34:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-10-28 00:34:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1310. [2020-10-28 00:34:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-10-28 00:34:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2041 transitions. [2020-10-28 00:34:47,413 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2041 transitions. Word has length 331 [2020-10-28 00:34:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:34:47,415 INFO L481 AbstractCegarLoop]: Abstraction has 1310 states and 2041 transitions. [2020-10-28 00:34:47,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:34:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2041 transitions. [2020-10-28 00:34:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:34:47,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:47,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:34:47,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:34:47,425 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash -834488451, now seen corresponding path program 1 times [2020-10-28 00:34:47,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:47,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068942547] [2020-10-28 00:34:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:48,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:48,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:52,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:52,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:34:52,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:34:52,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 00:34:52,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:52,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:34:52,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 00:34:52,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-28 00:34:52,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:54,272 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:34:54,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:34:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:54,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:34:54,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:34:54,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:34:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:34:54,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:34:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:34:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:34:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:34:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:34:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:34:54,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068942547] [2020-10-28 00:34:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:34:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:34:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470402868] [2020-10-28 00:34:54,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:34:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:34:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:34:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:34:54,526 INFO L87 Difference]: Start difference. First operand 1310 states and 2041 transitions. Second operand 4 states. [2020-10-28 00:34:56,012 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 00:35:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:02,425 INFO L93 Difference]: Finished difference Result 2686 states and 4216 transitions. [2020-10-28 00:35:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:02,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 00:35:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:02,441 INFO L225 Difference]: With dead ends: 2686 [2020-10-28 00:35:02,441 INFO L226 Difference]: Without dead ends: 2303 [2020-10-28 00:35:02,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-10-28 00:35:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2300. [2020-10-28 00:35:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-10-28 00:35:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3577 transitions. [2020-10-28 00:35:02,541 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3577 transitions. Word has length 331 [2020-10-28 00:35:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:02,542 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3577 transitions. [2020-10-28 00:35:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3577 transitions. [2020-10-28 00:35:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:35:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:02,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:35:02,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:35:02,552 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -159708538, now seen corresponding path program 1 times [2020-10-28 00:35:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:02,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282776350] [2020-10-28 00:35:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:02,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:03,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:07,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:07,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:35:07,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:35:07,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 00:35:07,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 00:35:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 00:35:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:09,078 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:35:09,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:09,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:09,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:09,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:09,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:09,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282776350] [2020-10-28 00:35:09,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:09,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:09,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033621444] [2020-10-28 00:35:09,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:09,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:09,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:09,329 INFO L87 Difference]: Start difference. First operand 2300 states and 3577 transitions. Second operand 4 states. [2020-10-28 00:35:10,863 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 00:35:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:17,238 INFO L93 Difference]: Finished difference Result 4870 states and 7637 transitions. [2020-10-28 00:35:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:17,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-28 00:35:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:17,263 INFO L225 Difference]: With dead ends: 4870 [2020-10-28 00:35:17,263 INFO L226 Difference]: Without dead ends: 4203 [2020-10-28 00:35:17,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-10-28 00:35:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4200. [2020-10-28 00:35:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-28 00:35:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6517 transitions. [2020-10-28 00:35:17,408 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6517 transitions. Word has length 331 [2020-10-28 00:35:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:17,409 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6517 transitions. [2020-10-28 00:35:17,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6517 transitions. [2020-10-28 00:35:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 00:35:17,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:17,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:35:17,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:35:17,421 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1289694683, now seen corresponding path program 1 times [2020-10-28 00:35:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:17,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483934894] [2020-10-28 00:35:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:17,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:19,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:19,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:19,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:20,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:22,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:22,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 00:35:22,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:35:22,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 00:35:22,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:22,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:35:22,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:35:22,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 00:35:22,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:24,247 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:35:24,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:24,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:24,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:24,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:24,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:35:24,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:24,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483934894] [2020-10-28 00:35:24,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:24,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:35:24,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549493372] [2020-10-28 00:35:24,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:35:24,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:24,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:35:24,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:24,465 INFO L87 Difference]: Start difference. First operand 4200 states and 6517 transitions. Second operand 5 states. [2020-10-28 00:35:34,171 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 00:35:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:36,748 INFO L93 Difference]: Finished difference Result 12385 states and 19189 transitions. [2020-10-28 00:35:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:35:36,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 00:35:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:36,789 INFO L225 Difference]: With dead ends: 12385 [2020-10-28 00:35:36,790 INFO L226 Difference]: Without dead ends: 8230 [2020-10-28 00:35:36,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:35:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-10-28 00:35:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8227. [2020-10-28 00:35:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8227 states. [2020-10-28 00:35:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8227 states to 8227 states and 12689 transitions. [2020-10-28 00:35:37,208 INFO L78 Accepts]: Start accepts. Automaton has 8227 states and 12689 transitions. Word has length 331 [2020-10-28 00:35:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:37,208 INFO L481 AbstractCegarLoop]: Abstraction has 8227 states and 12689 transitions. [2020-10-28 00:35:37,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:35:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8227 states and 12689 transitions. [2020-10-28 00:35:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 00:35:37,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:37,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:35:37,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:35:37,229 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1553145207, now seen corresponding path program 1 times [2020-10-28 00:35:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:37,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224296684] [2020-10-28 00:35:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:37,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:42,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:42,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 00:35:42,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:35:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:35:42,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:35:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:35:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 00:35:42,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:43,890 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:35:43,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:43,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:43,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:43,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:35:43,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:44,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224296684] [2020-10-28 00:35:44,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:44,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:35:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480557607] [2020-10-28 00:35:44,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:35:44,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:35:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:35:44,049 INFO L87 Difference]: Start difference. First operand 8227 states and 12689 transitions. Second operand 4 states. [2020-10-28 00:35:54,890 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:35:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:57,624 INFO L93 Difference]: Finished difference Result 24153 states and 37166 transitions. [2020-10-28 00:35:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:35:57,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-28 00:35:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:57,715 INFO L225 Difference]: With dead ends: 24153 [2020-10-28 00:35:57,716 INFO L226 Difference]: Without dead ends: 16047 [2020-10-28 00:35:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16047 states. [2020-10-28 00:35:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16047 to 16044. [2020-10-28 00:35:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16044 states. [2020-10-28 00:35:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16044 states to 16044 states and 24580 transitions. [2020-10-28 00:35:58,379 INFO L78 Accepts]: Start accepts. Automaton has 16044 states and 24580 transitions. Word has length 333 [2020-10-28 00:35:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:58,380 INFO L481 AbstractCegarLoop]: Abstraction has 16044 states and 24580 transitions. [2020-10-28 00:35:58,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:35:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 16044 states and 24580 transitions. [2020-10-28 00:35:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 00:35:58,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:58,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:35:58,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:35:58,412 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 25070994, now seen corresponding path program 1 times [2020-10-28 00:35:58,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:58,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068414807] [2020-10-28 00:35:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:58,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:58,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:58,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:59,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:00,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:01,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:03,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:03,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 00:36:03,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:36:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:04,999 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:36:05,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:05,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068414807] [2020-10-28 00:36:05,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:05,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178520044] [2020-10-28 00:36:05,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:05,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:05,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:05,163 INFO L87 Difference]: Start difference. First operand 16044 states and 24580 transitions. Second operand 4 states. [2020-10-28 00:36:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:17,812 INFO L93 Difference]: Finished difference Result 47912 states and 73356 transitions. [2020-10-28 00:36:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:36:17,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-28 00:36:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:17,890 INFO L225 Difference]: With dead ends: 47912 [2020-10-28 00:36:17,890 INFO L226 Difference]: Without dead ends: 31980 [2020-10-28 00:36:17,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31980 states. [2020-10-28 00:36:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31980 to 16057. [2020-10-28 00:36:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16057 states. [2020-10-28 00:36:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16057 states to 16057 states and 24596 transitions. [2020-10-28 00:36:18,814 INFO L78 Accepts]: Start accepts. Automaton has 16057 states and 24596 transitions. Word has length 333 [2020-10-28 00:36:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:18,814 INFO L481 AbstractCegarLoop]: Abstraction has 16057 states and 24596 transitions. [2020-10-28 00:36:18,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16057 states and 24596 transitions. [2020-10-28 00:36:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 00:36:18,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:18,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:36:18,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:36:18,848 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1845679888, now seen corresponding path program 1 times [2020-10-28 00:36:18,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:18,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134286948] [2020-10-28 00:36:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:19,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:19,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:20,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:23,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:23,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 00:36:23,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:36:23,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 00:36:23,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:36:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:36:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:36:23,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:25,485 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:36:25,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:25,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:25,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:25,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:36:25,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:25,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:25,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134286948] [2020-10-28 00:36:25,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:25,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:36:25,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975408989] [2020-10-28 00:36:25,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:36:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:36:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:25,627 INFO L87 Difference]: Start difference. First operand 16057 states and 24596 transitions. Second operand 5 states. [2020-10-28 00:36:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:39,175 INFO L93 Difference]: Finished difference Result 47675 states and 72923 transitions. [2020-10-28 00:36:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:39,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-28 00:36:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:39,247 INFO L225 Difference]: With dead ends: 47675 [2020-10-28 00:36:39,247 INFO L226 Difference]: Without dead ends: 31966 [2020-10-28 00:36:39,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:36:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31966 states. [2020-10-28 00:36:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31966 to 16319. [2020-10-28 00:36:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16319 states. [2020-10-28 00:36:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16319 states to 16319 states and 25058 transitions. [2020-10-28 00:36:40,197 INFO L78 Accepts]: Start accepts. Automaton has 16319 states and 25058 transitions. Word has length 334 [2020-10-28 00:36:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:40,197 INFO L481 AbstractCegarLoop]: Abstraction has 16319 states and 25058 transitions. [2020-10-28 00:36:40,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:36:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16319 states and 25058 transitions. [2020-10-28 00:36:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 00:36:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:40,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:36:40,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:36:40,228 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 469666093, now seen corresponding path program 1 times [2020-10-28 00:36:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:40,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863070890] [2020-10-28 00:36:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:40,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:44,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:45,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 00:36:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:46,800 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:36:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:46,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:46,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:46,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:46,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:46,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863070890] [2020-10-28 00:36:46,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:46,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:46,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453601615] [2020-10-28 00:36:46,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:46,981 INFO L87 Difference]: Start difference. First operand 16319 states and 25058 transitions. Second operand 4 states. [2020-10-28 00:36:59,202 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:37:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:02,316 INFO L93 Difference]: Finished difference Result 46292 states and 70925 transitions. [2020-10-28 00:37:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:02,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-28 00:37:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:02,360 INFO L225 Difference]: With dead ends: 46292 [2020-10-28 00:37:02,361 INFO L226 Difference]: Without dead ends: 30189 [2020-10-28 00:37:02,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30189 states. [2020-10-28 00:37:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30189 to 30186. [2020-10-28 00:37:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-10-28 00:37:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 46012 transitions. [2020-10-28 00:37:04,009 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 46012 transitions. Word has length 334 [2020-10-28 00:37:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:04,010 INFO L481 AbstractCegarLoop]: Abstraction has 30186 states and 46012 transitions. [2020-10-28 00:37:04,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 46012 transitions. [2020-10-28 00:37:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-28 00:37:04,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:04,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:04,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:37:04,054 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash -924232127, now seen corresponding path program 1 times [2020-10-28 00:37:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:04,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278052758] [2020-10-28 00:37:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:04,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:06,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:09,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:09,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-28 00:37:09,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:37:09,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 00:37:09,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:37:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:37:09,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:10,649 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:10,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:10,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:10,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:10,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278052758] [2020-10-28 00:37:10,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:10,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762315520] [2020-10-28 00:37:10,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:10,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:10,806 INFO L87 Difference]: Start difference. First operand 30186 states and 46012 transitions. Second operand 4 states. [2020-10-28 00:37:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:25,573 INFO L93 Difference]: Finished difference Result 88324 states and 134090 transitions. [2020-10-28 00:37:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:37:25,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-10-28 00:37:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:25,653 INFO L225 Difference]: With dead ends: 88324 [2020-10-28 00:37:25,653 INFO L226 Difference]: Without dead ends: 59258 [2020-10-28 00:37:25,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59258 states. [2020-10-28 00:37:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59258 to 30291. [2020-10-28 00:37:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30291 states. [2020-10-28 00:37:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30291 states to 30291 states and 46146 transitions. [2020-10-28 00:37:27,643 INFO L78 Accepts]: Start accepts. Automaton has 30291 states and 46146 transitions. Word has length 336 [2020-10-28 00:37:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:27,643 INFO L481 AbstractCegarLoop]: Abstraction has 30291 states and 46146 transitions. [2020-10-28 00:37:27,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30291 states and 46146 transitions. [2020-10-28 00:37:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 00:37:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:27,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:27,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:37:27,672 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash 107076793, now seen corresponding path program 1 times [2020-10-28 00:37:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:27,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845848892] [2020-10-28 00:37:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:30,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:32,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:32,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-28 00:37:32,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:37:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:37:32,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:37:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:37:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:37:32,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:34,271 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:34,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:34,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:34,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845848892] [2020-10-28 00:37:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:37:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996786612] [2020-10-28 00:37:34,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:37:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:37:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:34,386 INFO L87 Difference]: Start difference. First operand 30291 states and 46146 transitions. Second operand 5 states. [2020-10-28 00:37:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:42,212 INFO L93 Difference]: Finished difference Result 57449 states and 87274 transitions. [2020-10-28 00:37:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:42,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-28 00:37:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:42,251 INFO L225 Difference]: With dead ends: 57449 [2020-10-28 00:37:42,252 INFO L226 Difference]: Without dead ends: 28369 [2020-10-28 00:37:42,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:37:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28369 states. [2020-10-28 00:37:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28369 to 28333. [2020-10-28 00:37:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28333 states. [2020-10-28 00:37:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28333 states to 28333 states and 43156 transitions. [2020-10-28 00:37:43,713 INFO L78 Accepts]: Start accepts. Automaton has 28333 states and 43156 transitions. Word has length 337 [2020-10-28 00:37:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:43,713 INFO L481 AbstractCegarLoop]: Abstraction has 28333 states and 43156 transitions. [2020-10-28 00:37:43,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:37:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 28333 states and 43156 transitions. [2020-10-28 00:37:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 00:37:43,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:43,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:43,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:37:43,735 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:43,736 INFO L82 PathProgramCache]: Analyzing trace with hash 544554921, now seen corresponding path program 1 times [2020-10-28 00:37:43,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:43,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454018763] [2020-10-28 00:37:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:43,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:48,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:48,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-28 00:37:48,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:37:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 00:37:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:37:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:50,276 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:50,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:50,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454018763] [2020-10-28 00:37:50,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:50,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527358428] [2020-10-28 00:37:50,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:50,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:50,395 INFO L87 Difference]: Start difference. First operand 28333 states and 43156 transitions. Second operand 4 states.