/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:02:11,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:02:11,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:02:11,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:02:11,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:02:11,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:02:11,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:02:11,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:02:11,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:02:11,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:02:11,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:02:11,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:02:11,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:02:11,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:02:11,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:02:11,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:02:11,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:02:11,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:02:11,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:02:11,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:02:11,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:02:11,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:02:11,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:02:11,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:02:11,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:02:11,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:02:11,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:02:11,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:02:11,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:02:11,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:02:11,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:02:11,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:02:11,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:02:11,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:02:11,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:02:11,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:02:11,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:02:11,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:02:11,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:02:11,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:02:11,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:02:11,943 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 [2020-10-29 14:02:12,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:02:12,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:02:12,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:02:12,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:02:12,005 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:02:12,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:02:12,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:02:12,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:02:12,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:02:12,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:02:12,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:02:12,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:02:12,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:02:12,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:02:12,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:02:12,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:02:12,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:02:12,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:02:12,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:02:12,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:02:12,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:02:12,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:02:12,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:02:12,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:02:12,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:02:12,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:02:12,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:02:12,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:02:12,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:02:12,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:02:12,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:02:12,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:02:12,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:02:12,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:02:12,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:02:12,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 14:02:12,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21604ecf3/fc0a69e965cb4aaa859d76fe9d8a196c/FLAGcb5d8055b [2020-10-29 14:02:13,231 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:02:13,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 14:02:13,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21604ecf3/fc0a69e965cb4aaa859d76fe9d8a196c/FLAGcb5d8055b [2020-10-29 14:02:13,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21604ecf3/fc0a69e965cb4aaa859d76fe9d8a196c [2020-10-29 14:02:13,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:02:13,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:02:13,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:02:13,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:02:13,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:02:13,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:02:13" (1/1) ... [2020-10-29 14:02:13,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec72985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:13, skipping insertion in model container [2020-10-29 14:02:13,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:02:13" (1/1) ... [2020-10-29 14:02:13,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:02:13,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:02:14,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:02:14,023 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:02:14,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:02:14,179 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:02:14,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14 WrapperNode [2020-10-29 14:02:14,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:02:14,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:02:14,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:02:14,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:02:14,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... [2020-10-29 14:02:14,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:02:14,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:02:14,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:02:14,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:02:14,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:02:14,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:02:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:02:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:02:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:02:14,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:02:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:02:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:02:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:02:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:02:14,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:02:14,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:02:15,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:02:15,504 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:02:15,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:02:15 BoogieIcfgContainer [2020-10-29 14:02:15,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:02:15,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:02:15,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:02:15,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:02:15,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:02:13" (1/3) ... [2020-10-29 14:02:15,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9da98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:02:15, skipping insertion in model container [2020-10-29 14:02:15,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:14" (2/3) ... [2020-10-29 14:02:15,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9da98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:02:15, skipping insertion in model container [2020-10-29 14:02:15,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:02:15" (3/3) ... [2020-10-29 14:02:15,516 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 14:02:15,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:02:15,541 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:02:15,551 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:02:15,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:02:15,579 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:02:15,580 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:02:15,580 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:02:15,580 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:02:15,580 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:02:15,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:02:15,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:02:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-29 14:02:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 14:02:15,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:15,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:15,614 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-29 14:02:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:15,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675973288] [2020-10-29 14:02:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:16,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:16,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:16,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:19,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:19,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 14:02:19,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 14:02:19,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3230 [2020-10-29 14:02:19,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:19,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:19,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:02:19,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 14:02:19,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 14:02:19,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 14:02:19,717 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:19,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:19,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:19,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:19,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:19,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 14:02:19,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:19,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:19,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675973288] [2020-10-29 14:02:19,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:19,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:02:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701351189] [2020-10-29 14:02:19,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:02:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:02:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:02:19,822 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-29 14:02:20,255 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:02:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:21,214 INFO L93 Difference]: Finished difference Result 338 states and 566 transitions. [2020-10-29 14:02:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:02:21,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 14:02:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:21,229 INFO L225 Difference]: With dead ends: 338 [2020-10-29 14:02:21,229 INFO L226 Difference]: Without dead ends: 233 [2020-10-29 14:02:21,239 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 [2020-10-29 14:02:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-29 14:02:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-10-29 14:02:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-29 14:02:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2020-10-29 14:02:21,354 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 67 [2020-10-29 14:02:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:21,355 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2020-10-29 14:02:21,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:02:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2020-10-29 14:02:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 14:02:21,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:21,368 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] [2020-10-29 14:02:21,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:02:21,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 309649509, now seen corresponding path program 1 times [2020-10-29 14:02:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566833203] [2020-10-29 14:02:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:21,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:21,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:21,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:26,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:26,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 14:02:26,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:02:26,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 14:02:26,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:26,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:26,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:26,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:26,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 14:02:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 14:02:26,963 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:26,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:26,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:26,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:26,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:02:26,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:26,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:26,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:27,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566833203] [2020-10-29 14:02:27,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:27,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:27,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098598077] [2020-10-29 14:02:27,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:27,032 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand 5 states. [2020-10-29 14:02:28,216 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:02:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:28,339 INFO L93 Difference]: Finished difference Result 599 states and 959 transitions. [2020-10-29 14:02:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:02:28,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-29 14:02:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:28,344 INFO L225 Difference]: With dead ends: 599 [2020-10-29 14:02:28,344 INFO L226 Difference]: Without dead ends: 430 [2020-10-29 14:02:28,346 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 [2020-10-29 14:02:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-29 14:02:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2020-10-29 14:02:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-29 14:02:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 670 transitions. [2020-10-29 14:02:28,426 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 670 transitions. Word has length 69 [2020-10-29 14:02:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:28,429 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 670 transitions. [2020-10-29 14:02:28,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:02:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 670 transitions. [2020-10-29 14:02:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 14:02:28,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:28,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:28,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:02:28,436 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1064832472, now seen corresponding path program 1 times [2020-10-29 14:02:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:28,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363245668] [2020-10-29 14:02:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:33,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:33,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 14:02:33,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:02:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4929 [2020-10-29 14:02:33,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:33,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:33,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:33,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:33,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 14:02:33,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 14:02:33,846 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:33,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:33,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:33,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:33,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:33,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:33,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:33,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363245668] [2020-10-29 14:02:33,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:33,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:33,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415087433] [2020-10-29 14:02:33,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:33,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:33,911 INFO L87 Difference]: Start difference. First operand 427 states and 670 transitions. Second operand 5 states. [2020-10-29 14:02:35,216 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:02:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:35,334 INFO L93 Difference]: Finished difference Result 1142 states and 1824 transitions. [2020-10-29 14:02:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:02:35,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-29 14:02:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:35,341 INFO L225 Difference]: With dead ends: 1142 [2020-10-29 14:02:35,341 INFO L226 Difference]: Without dead ends: 819 [2020-10-29 14:02:35,348 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 [2020-10-29 14:02:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-29 14:02:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 816. [2020-10-29 14:02:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-29 14:02:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1274 transitions. [2020-10-29 14:02:35,475 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1274 transitions. Word has length 70 [2020-10-29 14:02:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:35,476 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1274 transitions. [2020-10-29 14:02:35,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:02:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1274 transitions. [2020-10-29 14:02:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 14:02:35,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:35,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:35,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:02:35,483 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2019754633, now seen corresponding path program 1 times [2020-10-29 14:02:35,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:35,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540377243] [2020-10-29 14:02:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:35,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:37,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:40,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 14:02:40,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:02:40,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 14:02:40,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:40,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:40,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:40,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 14:02:40,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:40,934 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:40,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:40,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:40,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:40,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:40,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 14:02:40,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:40,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:40,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540377243] [2020-10-29 14:02:40,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:40,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:40,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150800015] [2020-10-29 14:02:40,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:40,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:41,000 INFO L87 Difference]: Start difference. First operand 816 states and 1274 transitions. Second operand 5 states. [2020-10-29 14:02:42,225 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:02:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:42,412 INFO L93 Difference]: Finished difference Result 2333 states and 3632 transitions. [2020-10-29 14:02:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:02:42,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-29 14:02:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:42,424 INFO L225 Difference]: With dead ends: 2333 [2020-10-29 14:02:42,425 INFO L226 Difference]: Without dead ends: 1546 [2020-10-29 14:02:42,427 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 [2020-10-29 14:02:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-29 14:02:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1543. [2020-10-29 14:02:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-29 14:02:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2384 transitions. [2020-10-29 14:02:42,570 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2384 transitions. Word has length 70 [2020-10-29 14:02:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:42,571 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2384 transitions. [2020-10-29 14:02:42,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:02:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2384 transitions. [2020-10-29 14:02:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 14:02:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:42,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:42,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:02:42,575 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 213130055, now seen corresponding path program 1 times [2020-10-29 14:02:42,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:42,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697398251] [2020-10-29 14:02:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:47,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:47,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 14:02:47,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:02:47,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 14:02:47,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:47,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 14:02:47,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:48,022 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:48,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:48,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:48,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:48,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:02:48,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:48,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:48,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697398251] [2020-10-29 14:02:48,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:48,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:48,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999509389] [2020-10-29 14:02:48,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:48,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:48,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:48,079 INFO L87 Difference]: Start difference. First operand 1543 states and 2384 transitions. Second operand 5 states. [2020-10-29 14:02:49,406 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:02:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:49,642 INFO L93 Difference]: Finished difference Result 4298 states and 6701 transitions. [2020-10-29 14:02:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:02:49,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-29 14:02:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:49,660 INFO L225 Difference]: With dead ends: 4298 [2020-10-29 14:02:49,660 INFO L226 Difference]: Without dead ends: 2958 [2020-10-29 14:02:49,664 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 [2020-10-29 14:02:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-10-29 14:02:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2955. [2020-10-29 14:02:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-10-29 14:02:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4535 transitions. [2020-10-29 14:02:49,948 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4535 transitions. Word has length 71 [2020-10-29 14:02:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:49,949 INFO L481 AbstractCegarLoop]: Abstraction has 2955 states and 4535 transitions. [2020-10-29 14:02:49,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:02:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4535 transitions. [2020-10-29 14:02:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 14:02:49,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:49,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:49,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:02:49,955 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:49,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1131152968, now seen corresponding path program 1 times [2020-10-29 14:02:49,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:49,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626825639] [2020-10-29 14:02:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:50,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:51,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 14:02:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:02:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-10-29 14:02:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:51,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:02:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-29 14:02:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 14:02:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:51,981 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:51,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:51,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:52,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:52,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:52,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:52,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:02:52,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:52,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:52,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:02:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626825639] [2020-10-29 14:02:52,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:52,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:02:52,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239876560] [2020-10-29 14:02:52,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:02:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:02:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:02:52,037 INFO L87 Difference]: Start difference. First operand 2955 states and 4535 transitions. Second operand 4 states. [2020-10-29 14:02:52,404 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:02:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:53,547 INFO L93 Difference]: Finished difference Result 7297 states and 11691 transitions. [2020-10-29 14:02:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:02:53,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-29 14:02:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:53,574 INFO L225 Difference]: With dead ends: 7297 [2020-10-29 14:02:53,574 INFO L226 Difference]: Without dead ends: 5006 [2020-10-29 14:02:53,580 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 [2020-10-29 14:02:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2020-10-29 14:02:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 5003. [2020-10-29 14:02:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5003 states. [2020-10-29 14:02:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 7879 transitions. [2020-10-29 14:02:54,017 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 7879 transitions. Word has length 71 [2020-10-29 14:02:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:54,018 INFO L481 AbstractCegarLoop]: Abstraction has 5003 states and 7879 transitions. [2020-10-29 14:02:54,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:02:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 7879 transitions. [2020-10-29 14:02:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 14:02:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:54,025 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] [2020-10-29 14:02:54,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:02:54,025 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 175148071, now seen corresponding path program 1 times [2020-10-29 14:02:54,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:54,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210119935] [2020-10-29 14:02:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:54,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:57,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 14:02:57,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:02:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3261 [2020-10-29 14:02:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:57,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 14:02:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:57,818 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:02:57,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:57,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:57,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:02:57,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:57,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:57,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:02:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:57,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210119935] [2020-10-29 14:02:57,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:57,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543337232] [2020-10-29 14:02:57,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:57,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:57,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:57,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:57,892 INFO L87 Difference]: Start difference. First operand 5003 states and 7879 transitions. Second operand 5 states. [2020-10-29 14:02:59,784 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:03:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:00,274 INFO L93 Difference]: Finished difference Result 14171 states and 22429 transitions. [2020-10-29 14:03:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:00,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 14:03:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:00,343 INFO L225 Difference]: With dead ends: 14171 [2020-10-29 14:03:00,344 INFO L226 Difference]: Without dead ends: 9560 [2020-10-29 14:03:00,357 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 [2020-10-29 14:03:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9560 states. [2020-10-29 14:03:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9560 to 9557. [2020-10-29 14:03:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9557 states. [2020-10-29 14:03:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9557 states to 9557 states and 14889 transitions. [2020-10-29 14:03:01,408 INFO L78 Accepts]: Start accepts. Automaton has 9557 states and 14889 transitions. Word has length 74 [2020-10-29 14:03:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:01,408 INFO L481 AbstractCegarLoop]: Abstraction has 9557 states and 14889 transitions. [2020-10-29 14:03:01,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9557 states and 14889 transitions. [2020-10-29 14:03:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 14:03:01,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:01,419 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] [2020-10-29 14:03:01,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:03:01,419 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:01,420 INFO L82 PathProgramCache]: Analyzing trace with hash -433399397, now seen corresponding path program 1 times [2020-10-29 14:03:01,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792060943] [2020-10-29 14:03:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:01,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:01,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:06,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:06,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 14:03:06,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 14:03:06,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 14:03:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:06,876 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:03:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:06,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:06,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:06,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:06,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:06,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:06,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792060943] [2020-10-29 14:03:06,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:06,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:06,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359426144] [2020-10-29 14:03:06,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:06,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:06,935 INFO L87 Difference]: Start difference. First operand 9557 states and 14889 transitions. Second operand 5 states. [2020-10-29 14:03:07,302 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:03:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:09,585 INFO L93 Difference]: Finished difference Result 16969 states and 26466 transitions. [2020-10-29 14:03:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:09,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 14:03:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:09,642 INFO L225 Difference]: With dead ends: 16969 [2020-10-29 14:03:09,642 INFO L226 Difference]: Without dead ends: 12414 [2020-10-29 14:03:09,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:03:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2020-10-29 14:03:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 12411. [2020-10-29 14:03:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2020-10-29 14:03:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 18966 transitions. [2020-10-29 14:03:11,116 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 18966 transitions. Word has length 74 [2020-10-29 14:03:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:11,116 INFO L481 AbstractCegarLoop]: Abstraction has 12411 states and 18966 transitions. [2020-10-29 14:03:11,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 18966 transitions. [2020-10-29 14:03:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 14:03:11,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:11,133 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] [2020-10-29 14:03:11,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:03:11,134 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash 494135313, now seen corresponding path program 1 times [2020-10-29 14:03:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:11,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443050374] [2020-10-29 14:03:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:11,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:11,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:14,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:16,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 14:03:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:16,557 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:03:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:16,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:16,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:16,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:16,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443050374] [2020-10-29 14:03:16,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:16,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:16,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421456406] [2020-10-29 14:03:16,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:16,606 INFO L87 Difference]: Start difference. First operand 12411 states and 18966 transitions. Second operand 5 states. [2020-10-29 14:03:18,614 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:03:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:19,699 INFO L93 Difference]: Finished difference Result 35870 states and 54801 transitions. [2020-10-29 14:03:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:19,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-29 14:03:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:19,767 INFO L225 Difference]: With dead ends: 35870 [2020-10-29 14:03:19,767 INFO L226 Difference]: Without dead ends: 23813 [2020-10-29 14:03:19,795 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 [2020-10-29 14:03:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23813 states. [2020-10-29 14:03:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23813 to 23810. [2020-10-29 14:03:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23810 states. [2020-10-29 14:03:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23810 states to 23810 states and 35983 transitions. [2020-10-29 14:03:22,061 INFO L78 Accepts]: Start accepts. Automaton has 23810 states and 35983 transitions. Word has length 74 [2020-10-29 14:03:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:22,062 INFO L481 AbstractCegarLoop]: Abstraction has 23810 states and 35983 transitions. [2020-10-29 14:03:22,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23810 states and 35983 transitions. [2020-10-29 14:03:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 14:03:22,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:22,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:22,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:03:22,093 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 677298846, now seen corresponding path program 1 times [2020-10-29 14:03:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:22,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455505723] [2020-10-29 14:03:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:27,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 14:03:27,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:03:27,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 14:03:27,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:27,499 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:03:27,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:27,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:27,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:27,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:27,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455505723] [2020-10-29 14:03:27,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:27,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:03:27,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188048685] [2020-10-29 14:03:27,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:03:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:03:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:03:27,539 INFO L87 Difference]: Start difference. First operand 23810 states and 35983 transitions. Second operand 4 states. [2020-10-29 14:03:27,925 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:03:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:31,676 INFO L93 Difference]: Finished difference Result 57160 states and 88979 transitions. [2020-10-29 14:03:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:03:31,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-29 14:03:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:31,783 INFO L225 Difference]: With dead ends: 57160 [2020-10-29 14:03:31,783 INFO L226 Difference]: Without dead ends: 37253 [2020-10-29 14:03:31,829 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 [2020-10-29 14:03:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37253 states. [2020-10-29 14:03:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37253 to 37250. [2020-10-29 14:03:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37250 states. [2020-10-29 14:03:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37250 states to 37250 states and 55727 transitions. [2020-10-29 14:03:35,700 INFO L78 Accepts]: Start accepts. Automaton has 37250 states and 55727 transitions. Word has length 75 [2020-10-29 14:03:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:35,700 INFO L481 AbstractCegarLoop]: Abstraction has 37250 states and 55727 transitions. [2020-10-29 14:03:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:03:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37250 states and 55727 transitions. [2020-10-29 14:03:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 14:03:35,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:35,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:35,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 14:03:35,737 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:35,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1811444415, now seen corresponding path program 1 times [2020-10-29 14:03:35,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:35,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753857411] [2020-10-29 14:03:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:35,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:36,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:40,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:40,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 14:03:40,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:03:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 14:03:40,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:40,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:40,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:40,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:40,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 14:03:40,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:41,178 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:03:41,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:41,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:41,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:41,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:41,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753857411] [2020-10-29 14:03:41,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:41,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:41,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238679228] [2020-10-29 14:03:41,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:41,226 INFO L87 Difference]: Start difference. First operand 37250 states and 55727 transitions. Second operand 5 states. [2020-10-29 14:03:41,590 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:03:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:45,972 INFO L93 Difference]: Finished difference Result 61048 states and 91271 transitions. [2020-10-29 14:03:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:45,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-29 14:03:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:46,069 INFO L225 Difference]: With dead ends: 61048 [2020-10-29 14:03:46,070 INFO L226 Difference]: Without dead ends: 41829 [2020-10-29 14:03:46,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:03:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41829 states. [2020-10-29 14:03:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41829 to 41826. [2020-10-29 14:03:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41826 states. [2020-10-29 14:03:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41826 states to 41826 states and 61731 transitions. [2020-10-29 14:03:50,392 INFO L78 Accepts]: Start accepts. Automaton has 41826 states and 61731 transitions. Word has length 78 [2020-10-29 14:03:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:50,392 INFO L481 AbstractCegarLoop]: Abstraction has 41826 states and 61731 transitions. [2020-10-29 14:03:50,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 41826 states and 61731 transitions. [2020-10-29 14:03:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 14:03:50,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:50,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:50,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 14:03:50,426 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1303410491, now seen corresponding path program 1 times [2020-10-29 14:03:50,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:50,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007346980] [2020-10-29 14:03:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:50,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:55,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:55,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 14:03:55,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:03:55,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 14:03:55,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:55,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 14:03:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 14:03:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:55,822 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:03:55,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:55,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:55,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:55,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:03:55,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:55,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:55,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007346980] [2020-10-29 14:03:55,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:55,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:55,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962829285] [2020-10-29 14:03:55,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:55,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:55,857 INFO L87 Difference]: Start difference. First operand 41826 states and 61731 transitions. Second operand 5 states. [2020-10-29 14:03:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:58,972 INFO L93 Difference]: Finished difference Result 67864 states and 100292 transitions. [2020-10-29 14:03:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:03:58,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-29 14:03:58,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:59,017 INFO L225 Difference]: With dead ends: 67864 [2020-10-29 14:03:59,018 INFO L226 Difference]: Without dead ends: 26677 [2020-10-29 14:03:59,060 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 [2020-10-29 14:03:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2020-10-29 14:04:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26677. [2020-10-29 14:04:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26677 states. [2020-10-29 14:04:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26677 states to 26677 states and 39325 transitions. [2020-10-29 14:04:01,506 INFO L78 Accepts]: Start accepts. Automaton has 26677 states and 39325 transitions. Word has length 78 [2020-10-29 14:04:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:01,506 INFO L481 AbstractCegarLoop]: Abstraction has 26677 states and 39325 transitions. [2020-10-29 14:04:01,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26677 states and 39325 transitions. [2020-10-29 14:04:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 14:04:01,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:01,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:01,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 14:04:01,523 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1127866419, now seen corresponding path program 1 times [2020-10-29 14:04:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:01,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066032893] [2020-10-29 14:04:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:02,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:05,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:06,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:06,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 14:04:06,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 14:04:06,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 14:04:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:06,937 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:04:06,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:06,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:06,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:06,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:06,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066032893] [2020-10-29 14:04:06,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:06,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704832330] [2020-10-29 14:04:06,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:06,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:06,979 INFO L87 Difference]: Start difference. First operand 26677 states and 39325 transitions. Second operand 5 states. [2020-10-29 14:04:07,336 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:04:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:11,071 INFO L93 Difference]: Finished difference Result 47888 states and 70302 transitions. [2020-10-29 14:04:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:04:11,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-29 14:04:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:11,115 INFO L225 Difference]: With dead ends: 47888 [2020-10-29 14:04:11,115 INFO L226 Difference]: Without dead ends: 30631 [2020-10-29 14:04:11,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:04:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30631 states. [2020-10-29 14:04:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30631 to 30628. [2020-10-29 14:04:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30628 states. [2020-10-29 14:04:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30628 states to 30628 states and 44432 transitions. [2020-10-29 14:04:14,370 INFO L78 Accepts]: Start accepts. Automaton has 30628 states and 44432 transitions. Word has length 78 [2020-10-29 14:04:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 30628 states and 44432 transitions. [2020-10-29 14:04:14,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30628 states and 44432 transitions. [2020-10-29 14:04:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 14:04:14,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:14,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:14,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 14:04:14,386 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash 545851375, now seen corresponding path program 1 times [2020-10-29 14:04:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:14,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407503218] [2020-10-29 14:04:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:19,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 14:04:19,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:04:19,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 14:04:19,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:19,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 14:04:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 14:04:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 14:04:19,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:19,806 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:04:19,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:19,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:19,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:19,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407503218] [2020-10-29 14:04:19,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:19,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 14:04:19,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591668505] [2020-10-29 14:04:19,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 14:04:19,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 14:04:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:04:19,835 INFO L87 Difference]: Start difference. First operand 30628 states and 44432 transitions. Second operand 6 states. [2020-10-29 14:04:20,245 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:04:22,997 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:04:23,464 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:04:24,943 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 14:04:25,867 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:04:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:30,853 INFO L93 Difference]: Finished difference Result 119990 states and 181538 transitions. [2020-10-29 14:04:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 14:04:30,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 14:04:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:31,224 INFO L225 Difference]: With dead ends: 119990 [2020-10-29 14:04:31,224 INFO L226 Difference]: Without dead ends: 94799 [2020-10-29 14:04:31,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 14:04:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94799 states. [2020-10-29 14:04:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94799 to 53478. [2020-10-29 14:04:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53478 states. [2020-10-29 14:04:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53478 states to 53478 states and 78676 transitions. [2020-10-29 14:04:37,106 INFO L78 Accepts]: Start accepts. Automaton has 53478 states and 78676 transitions. Word has length 78 [2020-10-29 14:04:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:37,107 INFO L481 AbstractCegarLoop]: Abstraction has 53478 states and 78676 transitions. [2020-10-29 14:04:37,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 14:04:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 53478 states and 78676 transitions. [2020-10-29 14:04:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 14:04:37,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:37,127 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] [2020-10-29 14:04:37,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 14:04:37,127 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2126226500, now seen corresponding path program 1 times [2020-10-29 14:04:37,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:37,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574533690] [2020-10-29 14:04:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:37,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:42,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 14:04:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:04:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 14:04:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:42,522 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:04:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:42,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:42,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:42,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574533690] [2020-10-29 14:04:42,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:42,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342615713] [2020-10-29 14:04:42,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:42,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:42,561 INFO L87 Difference]: Start difference. First operand 53478 states and 78676 transitions. Second operand 5 states. [2020-10-29 14:04:42,932 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 14:04:46,497 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:04:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:54,270 INFO L93 Difference]: Finished difference Result 148227 states and 223406 transitions. [2020-10-29 14:04:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:04:54,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-29 14:04:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:54,418 INFO L225 Difference]: With dead ends: 148227 [2020-10-29 14:04:54,418 INFO L226 Difference]: Without dead ends: 100508 [2020-10-29 14:04:54,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 14:04:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100508 states. [2020-10-29 14:05:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100508 to 76762. [2020-10-29 14:05:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76762 states. [2020-10-29 14:05:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76762 states to 76762 states and 113696 transitions. [2020-10-29 14:05:02,968 INFO L78 Accepts]: Start accepts. Automaton has 76762 states and 113696 transitions. Word has length 79 [2020-10-29 14:05:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:02,968 INFO L481 AbstractCegarLoop]: Abstraction has 76762 states and 113696 transitions. [2020-10-29 14:05:02,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:05:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 76762 states and 113696 transitions. [2020-10-29 14:05:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 14:05:03,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:03,004 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] [2020-10-29 14:05:03,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 14:05:03,004 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1630757433, now seen corresponding path program 1 times [2020-10-29 14:05:03,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:03,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41007979] [2020-10-29 14:05:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:03,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 14:05:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:08,439 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:05:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:08,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:05:08,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:08,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41007979] [2020-10-29 14:05:08,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:08,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:05:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363988942] [2020-10-29 14:05:08,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:05:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:05:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:05:08,488 INFO L87 Difference]: Start difference. First operand 76762 states and 113696 transitions. Second operand 5 states. [2020-10-29 14:05:08,914 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-29 14:05:11,782 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 14:05:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:21,748 INFO L93 Difference]: Finished difference Result 158895 states and 238698 transitions. [2020-10-29 14:05:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:05:21,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-29 14:05:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:21,952 INFO L225 Difference]: With dead ends: 158895 [2020-10-29 14:05:21,952 INFO L226 Difference]: Without dead ends: 108716 [2020-10-29 14:05:22,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:05:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108716 states. [2020-10-29 14:05:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108716 to 108710. [2020-10-29 14:05:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108710 states. [2020-10-29 14:05:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108710 states to 108710 states and 157884 transitions. [2020-10-29 14:05:34,126 INFO L78 Accepts]: Start accepts. Automaton has 108710 states and 157884 transitions. Word has length 79 [2020-10-29 14:05:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:34,127 INFO L481 AbstractCegarLoop]: Abstraction has 108710 states and 157884 transitions. [2020-10-29 14:05:34,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:05:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 108710 states and 157884 transitions. [2020-10-29 14:05:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 14:05:34,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:34,152 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] [2020-10-29 14:05:34,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 14:05:34,153 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 807436011, now seen corresponding path program 1 times [2020-10-29 14:05:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:34,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209197697] [2020-10-29 14:05:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:35,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:35,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:39,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 14:05:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:39,595 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 14:05:39,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:39,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 14:05:39,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:39,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209197697] [2020-10-29 14:05:39,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:39,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 14:05:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279515223] [2020-10-29 14:05:39,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 14:05:39,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 14:05:39,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 14:05:39,645 INFO L87 Difference]: Start difference. First operand 108710 states and 157884 transitions. Second operand 8 states. [2020-10-29 14:05:40,047 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 14:05:42,745 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 204