/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:09:33,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:09:33,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:09:33,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:09:33,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:09:33,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:09:33,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:09:33,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:09:33,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:09:33,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:09:33,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:09:33,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:09:33,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:09:33,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:09:33,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:09:33,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:09:33,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:09:33,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:09:33,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:09:33,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:09:33,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:09:33,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:09:33,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:09:33,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:09:33,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:09:33,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:09:33,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:09:33,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:09:33,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:09:33,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:09:33,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:09:33,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:09:33,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:09:33,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:09:33,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:09:33,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:09:33,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:09:33,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:09:33,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:09:33,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:09:33,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:09:33,729 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 18:09:33,784 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:09:33,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:09:33,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:09:33,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:09:33,790 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:09:33,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:09:33,791 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:09:33,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:09:33,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:09:33,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:09:33,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:09:33,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:09:33,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:09:33,794 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:09:33,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:09:33,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:09:33,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:09:33,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:09:33,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:09:33,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:09:33,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:09:33,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:09:33,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:09:33,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:09:33,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:09:33,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:09:33,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:09:33,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:09:33,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:09:33,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:09:34,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:09:34,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:09:34,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:09:34,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:09:34,260 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:09:34,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:09:34,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f86f53f/e994a710f9a549ed80e8252d6a652b6e/FLAG6ad6c1883 [2020-10-28 18:09:34,979 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:09:34,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:09:34,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f86f53f/e994a710f9a549ed80e8252d6a652b6e/FLAG6ad6c1883 [2020-10-28 18:09:35,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90f86f53f/e994a710f9a549ed80e8252d6a652b6e [2020-10-28 18:09:35,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:09:35,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:09:35,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:09:35,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:09:35,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:09:35,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d52ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35, skipping insertion in model container [2020-10-28 18:09:35,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:09:35,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:09:35,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:09:35,754 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:09:35,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:09:35,890 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:09:35,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35 WrapperNode [2020-10-28 18:09:35,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:09:35,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:09:35,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:09:35,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:09:35,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (1/1) ... [2020-10-28 18:09:35,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:09:35,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:09:35,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:09:35,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:09:35,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (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 18:09:36,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:09:36,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:09:36,069 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:09:36,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:09:36,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:09:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:09:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:09:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:09:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:09:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:09:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:09:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:09:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:09:37,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:09:37,084 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:09:37,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:09:37 BoogieIcfgContainer [2020-10-28 18:09:37,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:09:37,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:09:37,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:09:37,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:09:37,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:09:35" (1/3) ... [2020-10-28 18:09:37,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68269070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:09:37, skipping insertion in model container [2020-10-28 18:09:37,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:09:35" (2/3) ... [2020-10-28 18:09:37,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68269070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:09:37, skipping insertion in model container [2020-10-28 18:09:37,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:09:37" (3/3) ... [2020-10-28 18:09:37,105 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:09:37,117 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:09:37,123 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:09:37,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:09:37,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:09:37,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:09:37,166 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:09:37,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:09:37,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:09:37,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:09:37,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:09:37,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:09:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-10-28 18:09:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:09:37,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:09:37,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:09:37,199 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:09:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:09:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1542310197, now seen corresponding path program 1 times [2020-10-28 18:09:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:09:37,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66650294] [2020-10-28 18:09:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:09:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:38,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:41,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:41,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:09:41,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:09:41,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3745 [2020-10-28 18:09:41,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:41,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:41,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:09:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:09:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:09:41,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:09:41,882 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:09:41,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:09:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:41,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:41,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:09:41,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:09:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:09:41,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:41,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:09:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:09:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:09:41,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:09:41,988 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 18:09:41,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66650294] [2020-10-28 18:09:41,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:09:41,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:09:41,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970744344] [2020-10-28 18:09:42,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:09:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:09:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:09:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:09:42,029 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 4 states. [2020-10-28 18:09:42,437 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:09:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:09:43,245 INFO L93 Difference]: Finished difference Result 318 states and 531 transitions. [2020-10-28 18:09:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:09:43,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 18:09:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:09:43,260 INFO L225 Difference]: With dead ends: 318 [2020-10-28 18:09:43,260 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 18:09:43,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:09:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 18:09:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2020-10-28 18:09:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 18:09:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 340 transitions. [2020-10-28 18:09:43,335 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 340 transitions. Word has length 61 [2020-10-28 18:09:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:09:43,335 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 340 transitions. [2020-10-28 18:09:43,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:09:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 340 transitions. [2020-10-28 18:09:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:09:43,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:09:43,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:09:43,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:09:43,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:09:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:09:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash -182129794, now seen corresponding path program 1 times [2020-10-28 18:09:43,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:09:43,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339089850] [2020-10-28 18:09:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:09:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:43,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:48,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:48,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:09:48,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:09:48,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4960 [2020-10-28 18:09:48,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:48,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:09:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:09:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:09:48,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:09:48,879 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:09:48,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:09:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:48,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:48,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:48,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:09:48,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:09:48,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:09:48,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:48,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:48,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:09:48,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:09:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:09:48,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:09:48,951 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 18:09:48,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339089850] [2020-10-28 18:09:48,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:09:48,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:09:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499602943] [2020-10-28 18:09:48,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:09:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:09:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:09:48,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:09:48,959 INFO L87 Difference]: Start difference. First operand 215 states and 340 transitions. Second operand 5 states. [2020-10-28 18:09:50,518 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:09:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:09:50,698 INFO L93 Difference]: Finished difference Result 567 states and 914 transitions. [2020-10-28 18:09:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:09:50,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-28 18:09:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:09:50,705 INFO L225 Difference]: With dead ends: 567 [2020-10-28 18:09:50,705 INFO L226 Difference]: Without dead ends: 410 [2020-10-28 18:09:50,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:09:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-28 18:09:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 407. [2020-10-28 18:09:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-28 18:09:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 644 transitions. [2020-10-28 18:09:50,783 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 644 transitions. Word has length 63 [2020-10-28 18:09:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:09:50,784 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 644 transitions. [2020-10-28 18:09:50,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:09:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 644 transitions. [2020-10-28 18:09:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:09:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:09:50,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:09:50,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:09:50,789 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:09:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:09:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash 673165032, now seen corresponding path program 1 times [2020-10-28 18:09:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:09:50,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116009907] [2020-10-28 18:09:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:09:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:50,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:50,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:51,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:54,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:54,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:09:54,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:09:54,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4080 [2020-10-28 18:09:54,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:54,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:09:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:09:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:09:54,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:09:55,272 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:09:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:09:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:55,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:55,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:09:55,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:09:55,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:09:55,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:09:55,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:09:55,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:09:55,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:09:55,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:09:55,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:09:55,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:09:55,331 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 18:09:55,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116009907] [2020-10-28 18:09:55,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:09:55,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:09:55,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533836464] [2020-10-28 18:09:55,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:09:55,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:09:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:09:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:09:55,337 INFO L87 Difference]: Start difference. First operand 407 states and 644 transitions. Second operand 5 states. [2020-10-28 18:09:56,443 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:09:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:09:56,555 INFO L93 Difference]: Finished difference Result 1134 states and 1790 transitions. [2020-10-28 18:09:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:09:56,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-28 18:09:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:09:56,561 INFO L225 Difference]: With dead ends: 1134 [2020-10-28 18:09:56,561 INFO L226 Difference]: Without dead ends: 764 [2020-10-28 18:09:56,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:09:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-10-28 18:09:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 761. [2020-10-28 18:09:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-10-28 18:09:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1192 transitions. [2020-10-28 18:09:56,651 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1192 transitions. Word has length 64 [2020-10-28 18:09:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:09:56,652 INFO L481 AbstractCegarLoop]: Abstraction has 761 states and 1192 transitions. [2020-10-28 18:09:56,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:09:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1192 transitions. [2020-10-28 18:09:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:09:56,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:09:56,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:09:56,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:09:56,660 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:09:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:09:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 59908075, now seen corresponding path program 1 times [2020-10-28 18:09:56,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:09:56,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672512731] [2020-10-28 18:09:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:09:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:09:56,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:09:58,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:01,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:01,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:10:01,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:10:01,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:10:01,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:01,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:10:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:02,084 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:02,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:02,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:02,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:02,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:02,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:02,164 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 18:10:02,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672512731] [2020-10-28 18:10:02,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:02,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:02,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420265132] [2020-10-28 18:10:02,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:02,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:02,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:02,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:02,168 INFO L87 Difference]: Start difference. First operand 761 states and 1192 transitions. Second operand 5 states. [2020-10-28 18:10:03,184 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:03,328 INFO L93 Difference]: Finished difference Result 2179 states and 3410 transitions. [2020-10-28 18:10:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:03,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-28 18:10:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:03,338 INFO L225 Difference]: With dead ends: 2179 [2020-10-28 18:10:03,338 INFO L226 Difference]: Without dead ends: 1447 [2020-10-28 18:10:03,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2020-10-28 18:10:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1444. [2020-10-28 18:10:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-28 18:10:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2244 transitions. [2020-10-28 18:10:03,490 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2244 transitions. Word has length 65 [2020-10-28 18:10:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:03,491 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2244 transitions. [2020-10-28 18:10:03,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2244 transitions. [2020-10-28 18:10:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:10:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:03,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:10:03,498 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1924082947, now seen corresponding path program 1 times [2020-10-28 18:10:03,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:03,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961071622] [2020-10-28 18:10:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:03,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:03,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:08,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:08,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:10:08,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:10:08,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:10:08,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:08,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:08,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:10:08,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 18:10:08,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:10:08,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:09,027 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:09,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:09,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:09,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:09,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:10:09,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:09,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:09,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:09,090 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 18:10:09,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961071622] [2020-10-28 18:10:09,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:09,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:10:09,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992709176] [2020-10-28 18:10:09,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:10:09,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:09,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:10:09,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:10:09,098 INFO L87 Difference]: Start difference. First operand 1444 states and 2244 transitions. Second operand 4 states. [2020-10-28 18:10:09,435 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:10:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:10,317 INFO L93 Difference]: Finished difference Result 3578 states and 5800 transitions. [2020-10-28 18:10:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:10:10,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:10:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:10,338 INFO L225 Difference]: With dead ends: 3578 [2020-10-28 18:10:10,339 INFO L226 Difference]: Without dead ends: 2459 [2020-10-28 18:10:10,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-10-28 18:10:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2440. [2020-10-28 18:10:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-10-28 18:10:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3880 transitions. [2020-10-28 18:10:10,586 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3880 transitions. Word has length 65 [2020-10-28 18:10:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:10,586 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3880 transitions. [2020-10-28 18:10:10,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:10:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3880 transitions. [2020-10-28 18:10:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:10:10,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:10,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:10,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:10:10,591 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:10,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1786039620, now seen corresponding path program 1 times [2020-10-28 18:10:10,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:10,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122619733] [2020-10-28 18:10:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:10,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:10,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:10,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:15,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:15,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:10:15,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:10:15,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:10:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:16,069 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:16,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:16,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:16,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:16,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:16,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:16,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:16,114 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 18:10:16,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122619733] [2020-10-28 18:10:16,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:16,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:16,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363029550] [2020-10-28 18:10:16,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:16,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:16,117 INFO L87 Difference]: Start difference. First operand 2440 states and 3880 transitions. Second operand 5 states. [2020-10-28 18:10:17,373 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:17,736 INFO L93 Difference]: Finished difference Result 6946 states and 11131 transitions. [2020-10-28 18:10:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:17,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:10:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:17,765 INFO L225 Difference]: With dead ends: 6946 [2020-10-28 18:10:17,766 INFO L226 Difference]: Without dead ends: 4694 [2020-10-28 18:10:17,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2020-10-28 18:10:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4691. [2020-10-28 18:10:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-10-28 18:10:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7423 transitions. [2020-10-28 18:10:18,259 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7423 transitions. Word has length 68 [2020-10-28 18:10:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:18,261 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7423 transitions. [2020-10-28 18:10:18,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7423 transitions. [2020-10-28 18:10:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:10:18,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:18,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:18,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:10:18,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1733743574, now seen corresponding path program 1 times [2020-10-28 18:10:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:18,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051870449] [2020-10-28 18:10:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:18,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:23,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:10:23,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:23,627 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:23,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:23,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:23,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:23,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:23,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:23,674 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 18:10:23,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051870449] [2020-10-28 18:10:23,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:23,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259699487] [2020-10-28 18:10:23,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:23,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:23,676 INFO L87 Difference]: Start difference. First operand 4691 states and 7423 transitions. Second operand 5 states. [2020-10-28 18:10:25,064 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:25,610 INFO L93 Difference]: Finished difference Result 13480 states and 21411 transitions. [2020-10-28 18:10:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:25,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:10:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:25,655 INFO L225 Difference]: With dead ends: 13480 [2020-10-28 18:10:25,655 INFO L226 Difference]: Without dead ends: 9005 [2020-10-28 18:10:25,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2020-10-28 18:10:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 9002. [2020-10-28 18:10:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9002 states. [2020-10-28 18:10:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9002 states to 9002 states and 14115 transitions. [2020-10-28 18:10:26,535 INFO L78 Accepts]: Start accepts. Automaton has 9002 states and 14115 transitions. Word has length 68 [2020-10-28 18:10:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:26,535 INFO L481 AbstractCegarLoop]: Abstraction has 9002 states and 14115 transitions. [2020-10-28 18:10:26,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9002 states and 14115 transitions. [2020-10-28 18:10:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:10:26,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:26,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:26,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:10:26,551 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:26,551 INFO L82 PathProgramCache]: Analyzing trace with hash 374861737, now seen corresponding path program 1 times [2020-10-28 18:10:26,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:26,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711014445] [2020-10-28 18:10:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:26,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:26,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:26,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:26,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:31,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:31,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:10:31,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:10:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:10:31,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:31,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:10:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:10:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 18:10:31,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:31,984 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:31,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:31,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:32,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:32,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:32,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:10:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:32,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:32,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:10:32,039 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 18:10:32,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711014445] [2020-10-28 18:10:32,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:32,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:10:32,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935735478] [2020-10-28 18:10:32,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:10:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:10:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:10:32,052 INFO L87 Difference]: Start difference. First operand 9002 states and 14115 transitions. Second operand 4 states. [2020-10-28 18:10:32,408 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:10:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:34,232 INFO L93 Difference]: Finished difference Result 23664 states and 37991 transitions. [2020-10-28 18:10:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:10:34,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:10:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:34,293 INFO L225 Difference]: With dead ends: 23664 [2020-10-28 18:10:34,293 INFO L226 Difference]: Without dead ends: 15821 [2020-10-28 18:10:34,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2020-10-28 18:10:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 15690. [2020-10-28 18:10:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15690 states. [2020-10-28 18:10:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15690 states to 15690 states and 24259 transitions. [2020-10-28 18:10:35,563 INFO L78 Accepts]: Start accepts. Automaton has 15690 states and 24259 transitions. Word has length 69 [2020-10-28 18:10:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:35,564 INFO L481 AbstractCegarLoop]: Abstraction has 15690 states and 24259 transitions. [2020-10-28 18:10:35,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:10:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15690 states and 24259 transitions. [2020-10-28 18:10:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:10:35,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:35,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:35,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:10:35,580 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -612611848, now seen corresponding path program 1 times [2020-10-28 18:10:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:35,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722444247] [2020-10-28 18:10:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:35,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:38,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:40,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:10:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:10:40,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:40,981 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:40,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:40,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:41,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:41,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:41,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:41,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:10:41,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:41,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:41,024 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 18:10:41,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722444247] [2020-10-28 18:10:41,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:41,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:41,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141097579] [2020-10-28 18:10:41,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:41,027 INFO L87 Difference]: Start difference. First operand 15690 states and 24259 transitions. Second operand 5 states. [2020-10-28 18:10:42,903 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:10:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:44,303 INFO L93 Difference]: Finished difference Result 45572 states and 70558 transitions. [2020-10-28 18:10:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:10:44,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:10:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:44,395 INFO L225 Difference]: With dead ends: 45572 [2020-10-28 18:10:44,395 INFO L226 Difference]: Without dead ends: 30195 [2020-10-28 18:10:44,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:10:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30195 states. [2020-10-28 18:10:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30195 to 30192. [2020-10-28 18:10:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30192 states. [2020-10-28 18:10:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30192 states to 30192 states and 46277 transitions. [2020-10-28 18:10:47,444 INFO L78 Accepts]: Start accepts. Automaton has 30192 states and 46277 transitions. Word has length 72 [2020-10-28 18:10:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:47,445 INFO L481 AbstractCegarLoop]: Abstraction has 30192 states and 46277 transitions. [2020-10-28 18:10:47,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 30192 states and 46277 transitions. [2020-10-28 18:10:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:10:47,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:47,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:47,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:10:47,474 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -809078903, now seen corresponding path program 1 times [2020-10-28 18:10:47,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:47,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149699938] [2020-10-28 18:10:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:47,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:52,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:10:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:10:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:52,874 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:10:52,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:10:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:52,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:52,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:10:52,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:10:52,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:10:52,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:10:52,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:10:52,911 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 18:10:52,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149699938] [2020-10-28 18:10:52,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:10:52,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:10:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169085558] [2020-10-28 18:10:52,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:10:52,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:10:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:10:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:10:52,914 INFO L87 Difference]: Start difference. First operand 30192 states and 46277 transitions. Second operand 5 states. [2020-10-28 18:10:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:10:55,208 INFO L93 Difference]: Finished difference Result 49695 states and 75948 transitions. [2020-10-28 18:10:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:10:55,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 18:10:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:10:55,258 INFO L225 Difference]: With dead ends: 49695 [2020-10-28 18:10:55,259 INFO L226 Difference]: Without dead ends: 19606 [2020-10-28 18:10:55,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:10:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19606 states. [2020-10-28 18:10:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19606 to 19606. [2020-10-28 18:10:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19606 states. [2020-10-28 18:10:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19606 states to 19606 states and 29816 transitions. [2020-10-28 18:10:56,969 INFO L78 Accepts]: Start accepts. Automaton has 19606 states and 29816 transitions. Word has length 73 [2020-10-28 18:10:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:10:56,969 INFO L481 AbstractCegarLoop]: Abstraction has 19606 states and 29816 transitions. [2020-10-28 18:10:56,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:10:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19606 states and 29816 transitions. [2020-10-28 18:10:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:10:56,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:56,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:10:56,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:10:56,983 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1338563611, now seen corresponding path program 1 times [2020-10-28 18:10:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:56,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027727905] [2020-10-28 18:10:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:57,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:02,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 18:11:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:11:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:02,420 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:02,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:02,459 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 18:11:02,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027727905] [2020-10-28 18:11:02,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:02,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:02,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181115707] [2020-10-28 18:11:02,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:02,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:02,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:02,462 INFO L87 Difference]: Start difference. First operand 19606 states and 29816 transitions. Second operand 5 states. [2020-10-28 18:11:02,820 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:11:04,427 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 18:11:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:06,390 INFO L93 Difference]: Finished difference Result 39055 states and 60942 transitions. [2020-10-28 18:11:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:11:06,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 18:11:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:06,442 INFO L225 Difference]: With dead ends: 39055 [2020-10-28 18:11:06,443 INFO L226 Difference]: Without dead ends: 29252 [2020-10-28 18:11:06,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29252 states. [2020-10-28 18:11:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29252 to 29086. [2020-10-28 18:11:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29086 states. [2020-10-28 18:11:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29086 states to 29086 states and 43856 transitions. [2020-10-28 18:11:08,710 INFO L78 Accepts]: Start accepts. Automaton has 29086 states and 43856 transitions. Word has length 73 [2020-10-28 18:11:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:08,710 INFO L481 AbstractCegarLoop]: Abstraction has 29086 states and 43856 transitions. [2020-10-28 18:11:08,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 29086 states and 43856 transitions. [2020-10-28 18:11:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:11:08,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:08,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:11:08,724 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:08,724 INFO L82 PathProgramCache]: Analyzing trace with hash 608512586, now seen corresponding path program 1 times [2020-10-28 18:11:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:08,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971772633] [2020-10-28 18:11:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:08,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:13,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:13,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:11:13,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:13,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:11:13,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:13,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:13,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:13,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:11:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:11:13,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:14,125 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:14,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:14,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:14,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:14,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:14,156 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 18:11:14,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971772633] [2020-10-28 18:11:14,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:14,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:14,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278521421] [2020-10-28 18:11:14,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:14,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:14,158 INFO L87 Difference]: Start difference. First operand 29086 states and 43856 transitions. Second operand 5 states. [2020-10-28 18:11:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:16,502 INFO L93 Difference]: Finished difference Result 47747 states and 71852 transitions. [2020-10-28 18:11:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:16,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 18:11:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:16,527 INFO L225 Difference]: With dead ends: 47747 [2020-10-28 18:11:16,527 INFO L226 Difference]: Without dead ends: 18883 [2020-10-28 18:11:16,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:11:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2020-10-28 18:11:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 18881. [2020-10-28 18:11:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18881 states. [2020-10-28 18:11:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18881 states to 18881 states and 28248 transitions. [2020-10-28 18:11:17,931 INFO L78 Accepts]: Start accepts. Automaton has 18881 states and 28248 transitions. Word has length 74 [2020-10-28 18:11:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:17,934 INFO L481 AbstractCegarLoop]: Abstraction has 18881 states and 28248 transitions. [2020-10-28 18:11:17,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18881 states and 28248 transitions. [2020-10-28 18:11:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:11:17,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:17,943 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] [2020-10-28 18:11:17,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:11:17,944 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1812635316, now seen corresponding path program 1 times [2020-10-28 18:11:17,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:17,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894757696] [2020-10-28 18:11:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:18,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:22,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:11:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:11:22,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:23,312 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:23,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:23,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:23,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:11:23,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:23,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:23,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:23,340 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 18:11:23,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894757696] [2020-10-28 18:11:23,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:23,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417019067] [2020-10-28 18:11:23,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:23,343 INFO L87 Difference]: Start difference. First operand 18881 states and 28248 transitions. Second operand 4 states. [2020-10-28 18:11:23,698 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 18:11:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:26,614 INFO L93 Difference]: Finished difference Result 43007 states and 65352 transitions. [2020-10-28 18:11:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:26,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-28 18:11:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:26,652 INFO L225 Difference]: With dead ends: 43007 [2020-10-28 18:11:26,653 INFO L226 Difference]: Without dead ends: 31104 [2020-10-28 18:11:26,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31104 states. [2020-10-28 18:11:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31104 to 31101. [2020-10-28 18:11:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31101 states. [2020-10-28 18:11:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31101 states to 31101 states and 46848 transitions. [2020-10-28 18:11:29,094 INFO L78 Accepts]: Start accepts. Automaton has 31101 states and 46848 transitions. Word has length 76 [2020-10-28 18:11:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:29,094 INFO L481 AbstractCegarLoop]: Abstraction has 31101 states and 46848 transitions. [2020-10-28 18:11:29,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31101 states and 46848 transitions. [2020-10-28 18:11:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:11:29,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:29,102 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] [2020-10-28 18:11:29,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:11:29,103 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2061920045, now seen corresponding path program 1 times [2020-10-28 18:11:29,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:29,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378506703] [2020-10-28 18:11:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:29,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:29,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:34,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:34,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 18:11:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:11:34,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,492 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:34,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:34,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:34,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:34,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:34,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:34,519 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 18:11:34,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378506703] [2020-10-28 18:11:34,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:34,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421483967] [2020-10-28 18:11:34,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:34,521 INFO L87 Difference]: Start difference. First operand 31101 states and 46848 transitions. Second operand 5 states. [2020-10-28 18:11:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:37,287 INFO L93 Difference]: Finished difference Result 51246 states and 77130 transitions. [2020-10-28 18:11:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:37,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-28 18:11:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:37,322 INFO L225 Difference]: With dead ends: 51246 [2020-10-28 18:11:37,323 INFO L226 Difference]: Without dead ends: 26509 [2020-10-28 18:11:37,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:11:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26509 states. [2020-10-28 18:11:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26509 to 26507. [2020-10-28 18:11:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26507 states. [2020-10-28 18:11:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26507 states to 26507 states and 39806 transitions. [2020-10-28 18:11:39,500 INFO L78 Accepts]: Start accepts. Automaton has 26507 states and 39806 transitions. Word has length 76 [2020-10-28 18:11:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:39,500 INFO L481 AbstractCegarLoop]: Abstraction has 26507 states and 39806 transitions. [2020-10-28 18:11:39,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 26507 states and 39806 transitions. [2020-10-28 18:11:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:11:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:39,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:39,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:11:39,509 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1657524273, now seen corresponding path program 1 times [2020-10-28 18:11:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:39,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114301303] [2020-10-28 18:11:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:11:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:11:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:44,877 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:44,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:44,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:44,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:44,907 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 18:11:44,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114301303] [2020-10-28 18:11:44,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:44,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470199150] [2020-10-28 18:11:44,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:44,909 INFO L87 Difference]: Start difference. First operand 26507 states and 39806 transitions. Second operand 4 states. [2020-10-28 18:11:45,268 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:11:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:49,058 INFO L93 Difference]: Finished difference Result 51926 states and 78576 transitions. [2020-10-28 18:11:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:49,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:11:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:49,103 INFO L225 Difference]: With dead ends: 51926 [2020-10-28 18:11:49,104 INFO L226 Difference]: Without dead ends: 38174 [2020-10-28 18:11:49,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38174 states. [2020-10-28 18:11:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38174 to 38171. [2020-10-28 18:11:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38171 states. [2020-10-28 18:11:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38171 states to 38171 states and 57233 transitions. [2020-10-28 18:11:52,368 INFO L78 Accepts]: Start accepts. Automaton has 38171 states and 57233 transitions. Word has length 79 [2020-10-28 18:11:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:52,369 INFO L481 AbstractCegarLoop]: Abstraction has 38171 states and 57233 transitions. [2020-10-28 18:11:52,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38171 states and 57233 transitions. [2020-10-28 18:11:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:11:52,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:52,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:11:52,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:11:52,375 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -531419214, now seen corresponding path program 1 times [2020-10-28 18:11:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886767188] [2020-10-28 18:11:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:57,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:11:57,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:11:57,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:57,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 18:11:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 18:11:57,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:57,731 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:11:57,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:57,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:57,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:57,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:57,766 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 18:11:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886767188] [2020-10-28 18:11:57,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:57,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:57,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323329451] [2020-10-28 18:11:57,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:57,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:57,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:57,768 INFO L87 Difference]: Start difference. First operand 38171 states and 57233 transitions. Second operand 4 states. [2020-10-28 18:11:58,120 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:12:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:03,029 INFO L93 Difference]: Finished difference Result 70441 states and 106748 transitions. [2020-10-28 18:12:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:03,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:12:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:03,099 INFO L225 Difference]: With dead ends: 70441 [2020-10-28 18:12:03,099 INFO L226 Difference]: Without dead ends: 50874 [2020-10-28 18:12:03,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50874 states. [2020-10-28 18:12:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50874 to 50871. [2020-10-28 18:12:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50871 states. [2020-10-28 18:12:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50871 states to 50871 states and 76449 transitions. [2020-10-28 18:12:07,705 INFO L78 Accepts]: Start accepts. Automaton has 50871 states and 76449 transitions. Word has length 80 [2020-10-28 18:12:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:07,705 INFO L481 AbstractCegarLoop]: Abstraction has 50871 states and 76449 transitions. [2020-10-28 18:12:07,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50871 states and 76449 transitions. [2020-10-28 18:12:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:12:07,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:07,710 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] [2020-10-28 18:12:07,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:12:07,710 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash 763067671, now seen corresponding path program 1 times [2020-10-28 18:12:07,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:07,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767154784] [2020-10-28 18:12:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:09,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:11,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:12:11,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:12:11,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4193 [2020-10-28 18:12:11,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:11,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:12:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 18:12:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:12,253 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:12,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:12,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:12,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:12,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:12:12,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:12,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:12,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:12,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:12,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:12,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:12,284 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 18:12:12,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767154784] [2020-10-28 18:12:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22693060] [2020-10-28 18:12:12,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:12,286 INFO L87 Difference]: Start difference. First operand 50871 states and 76449 transitions. Second operand 4 states. [2020-10-28 18:12:12,649 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 18:12:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:19,760 INFO L93 Difference]: Finished difference Result 116187 states and 177958 transitions. [2020-10-28 18:12:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:19,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:12:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:19,867 INFO L225 Difference]: With dead ends: 116187 [2020-10-28 18:12:19,867 INFO L226 Difference]: Without dead ends: 77387 [2020-10-28 18:12:19,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77387 states. [2020-10-28 18:12:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77387 to 77384. [2020-10-28 18:12:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77384 states. [2020-10-28 18:12:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77384 states to 77384 states and 117744 transitions. [2020-10-28 18:12:26,866 INFO L78 Accepts]: Start accepts. Automaton has 77384 states and 117744 transitions. Word has length 81 [2020-10-28 18:12:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 77384 states and 117744 transitions. [2020-10-28 18:12:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 77384 states and 117744 transitions. [2020-10-28 18:12:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:12:26,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:26,869 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] [2020-10-28 18:12:26,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:12:26,869 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -259242297, now seen corresponding path program 1 times [2020-10-28 18:12:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:26,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114217365] [2020-10-28 18:12:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3316 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:12:30,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:12:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 18:12:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:30,577 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:30,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:30,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:30,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:30,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:12:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:30,622 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 18:12:30,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114217365] [2020-10-28 18:12:30,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:30,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:30,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800104534] [2020-10-28 18:12:30,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:12:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:12:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:30,624 INFO L87 Difference]: Start difference. First operand 77384 states and 117744 transitions. Second operand 6 states. [2020-10-28 18:12:30,993 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:12:32,667 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:43,414 INFO L93 Difference]: Finished difference Result 196178 states and 299287 transitions. [2020-10-28 18:12:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:12:43,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-28 18:12:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:43,674 INFO L225 Difference]: With dead ends: 196178 [2020-10-28 18:12:43,674 INFO L226 Difference]: Without dead ends: 120035 [2020-10-28 18:12:43,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:12:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120035 states. [2020-10-28 18:12:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120035 to 120032. [2020-10-28 18:12:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120032 states. [2020-10-28 18:12:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120032 states to 120032 states and 181356 transitions. [2020-10-28 18:12:55,445 INFO L78 Accepts]: Start accepts. Automaton has 120032 states and 181356 transitions. Word has length 82 [2020-10-28 18:12:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:55,445 INFO L481 AbstractCegarLoop]: Abstraction has 120032 states and 181356 transitions. [2020-10-28 18:12:55,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:12:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 120032 states and 181356 transitions. [2020-10-28 18:12:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:12:55,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:55,449 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] [2020-10-28 18:12:55,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:12:55,449 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:55,450 INFO L82 PathProgramCache]: Analyzing trace with hash -424800212, now seen corresponding path program 1 times [2020-10-28 18:12:55,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:55,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634888128] [2020-10-28 18:12:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:55,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:56,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:12:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:57,108 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 18:12:57,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:57,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:57,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:57,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:57,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:12:57,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:57,184 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 18:12:57,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634888128] [2020-10-28 18:12:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:57,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:57,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45341098] [2020-10-28 18:12:57,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:12:57,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:12:57,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:57,186 INFO L87 Difference]: Start difference. First operand 120032 states and 181356 transitions. Second operand 6 states. [2020-10-28 18:12:57,576 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:12:59,327 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 191