/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_floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:07:11,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:07:11,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:07:11,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:07:11,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:07:11,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:07:11,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:07:11,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:07:11,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:07:11,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:07:11,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:07:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:07:11,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:07:11,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:07:11,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:07:11,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:07:11,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:07:11,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:07:11,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:07:11,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:07:11,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:07:11,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:07:11,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:07:11,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:07:11,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:07:11,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:07:11,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:07:11,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:07:11,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:07:11,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:07:11,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:07:11,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:07:11,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:07:11,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:07:11,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:07:11,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:07:11,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:07:11,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:07:11,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:07:11,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:07:11,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:07:11,453 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 13:07:11,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:07:11,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:07:11,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:07:11,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:07:11,496 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:07:11,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:07:11,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:07:11,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:07:11,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:07:11,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:07:11,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:07:11,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:07:11,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:07:11,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:07:11,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:07:11,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:07:11,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:07:11,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:07:11,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:07:11,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:07:11,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:07:11,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:07:11,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:07:11,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:07:11,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:07:11,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:07:11,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:07:11,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:07:11,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:07:11,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:07:11,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:07:11,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:07:11,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:07:11,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:07:11,896 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:07:11,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:07:11,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be1833e5/a0ab8c660f6146a1b9f1501babf60d90/FLAGac1d02f53 [2020-10-29 13:07:12,815 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:07:12,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:07:12,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be1833e5/a0ab8c660f6146a1b9f1501babf60d90/FLAGac1d02f53 [2020-10-29 13:07:12,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be1833e5/a0ab8c660f6146a1b9f1501babf60d90 [2020-10-29 13:07:12,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:07:12,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:07:12,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:07:12,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:07:12,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:07:12,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:07:12" (1/1) ... [2020-10-29 13:07:12,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ec727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:12, skipping insertion in model container [2020-10-29 13:07:12,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:07:12" (1/1) ... [2020-10-29 13:07:12,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:07:13,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:07:14,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:07:14,479 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:07:15,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:07:15,294 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:07:15,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15 WrapperNode [2020-10-29 13:07:15,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:07:15,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:07:15,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:07:15,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:07:15,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (1/1) ... [2020-10-29 13:07:15,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:07:15,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:07:15,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:07:15,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:07:15,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (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 13:07:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:07:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:07:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:07:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:07:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:07:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:07:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:07:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:07:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:07:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:07:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:07:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:07:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:07:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:07:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:07:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:07:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:07:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:07:19,190 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:07:19,191 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:07:19,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:07:19 BoogieIcfgContainer [2020-10-29 13:07:19,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:07:19,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:07:19,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:07:19,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:07:19,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:07:12" (1/3) ... [2020-10-29 13:07:19,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfa60c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:07:19, skipping insertion in model container [2020-10-29 13:07:19,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:07:15" (2/3) ... [2020-10-29 13:07:19,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfa60c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:07:19, skipping insertion in model container [2020-10-29 13:07:19,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:07:19" (3/3) ... [2020-10-29 13:07:19,206 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:07:19,221 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:07:19,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:07:19,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:07:19,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:07:19,284 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:07:19,284 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:07:19,284 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:07:19,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:07:19,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:07:19,285 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:07:19,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:07:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states. [2020-10-29 13:07:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:07:19,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:19,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:07:19,366 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1915501587, now seen corresponding path program 1 times [2020-10-29 13:07:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:19,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634356933] [2020-10-29 13:07:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:20,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:21,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:24,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:24,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:25,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:25,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:07:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:07:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-29 13:07:25,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:25,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:25,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 13:07:25,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-29 13:07:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:07:26,390 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:07:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:26,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:26,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:26,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:26,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:26,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:07:26,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:26,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:07:26,700 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 13:07:26,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634356933] [2020-10-29 13:07:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:26,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:07:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972057267] [2020-10-29 13:07:26,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:07:26,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:26,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:07:26,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:07:26,729 INFO L87 Difference]: Start difference. First operand 938 states. Second operand 4 states. [2020-10-29 13:07:27,703 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:07:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:35,848 INFO L93 Difference]: Finished difference Result 1618 states and 2906 transitions. [2020-10-29 13:07:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:07:35,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-29 13:07:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:35,887 INFO L225 Difference]: With dead ends: 1618 [2020-10-29 13:07:35,887 INFO L226 Difference]: Without dead ends: 1337 [2020-10-29 13:07:35,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2020-10-29 13:07:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1334. [2020-10-29 13:07:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1334 states. [2020-10-29 13:07:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 2048 transitions. [2020-10-29 13:07:36,072 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 2048 transitions. Word has length 309 [2020-10-29 13:07:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:36,074 INFO L481 AbstractCegarLoop]: Abstraction has 1334 states and 2048 transitions. [2020-10-29 13:07:36,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:07:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 2048 transitions. [2020-10-29 13:07:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:07:36,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:36,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:07:36,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:07:36,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash -5173982, now seen corresponding path program 1 times [2020-10-29 13:07:36,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:36,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696097207] [2020-10-29 13:07:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:36,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:36,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:37,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:38,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:41,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:41,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:07:41,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:07:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 13:07:41,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:41,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:41,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-29 13:07:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-29 13:07:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:07:42,335 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:07:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:42,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:42,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:42,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:42,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:07:42,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:42,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:42,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:42,572 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 13:07:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696097207] [2020-10-29 13:07:42,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:42,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:07:42,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630971768] [2020-10-29 13:07:42,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:07:42,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:07:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:07:42,590 INFO L87 Difference]: Start difference. First operand 1334 states and 2048 transitions. Second operand 4 states. [2020-10-29 13:07:43,585 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:07:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:50,354 INFO L93 Difference]: Finished difference Result 2555 states and 3961 transitions. [2020-10-29 13:07:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:07:50,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-29 13:07:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:50,370 INFO L225 Difference]: With dead ends: 2555 [2020-10-29 13:07:50,370 INFO L226 Difference]: Without dead ends: 2187 [2020-10-29 13:07:50,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-10-29 13:07:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2184. [2020-10-29 13:07:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-10-29 13:07:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3359 transitions. [2020-10-29 13:07:50,474 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3359 transitions. Word has length 309 [2020-10-29 13:07:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:50,476 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3359 transitions. [2020-10-29 13:07:50,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:07:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3359 transitions. [2020-10-29 13:07:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:07:50,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:50,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:07:50,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:07:50,488 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2111090918, now seen corresponding path program 1 times [2020-10-29 13:07:50,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:50,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972353081] [2020-10-29 13:07:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:50,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:50,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:51,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:51,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:51,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:51,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:51,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:52,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:55,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:55,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:07:55,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:07:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:07:55,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:55,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:55,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 13:07:55,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-29 13:07:55,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:07:56,665 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:07:56,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:56,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:56,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:56,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:56,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:07:56,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:56,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:56,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:56,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:07:56,872 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 13:07:56,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972353081] [2020-10-29 13:07:56,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:56,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:07:56,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998936062] [2020-10-29 13:07:56,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:07:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:07:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:07:56,876 INFO L87 Difference]: Start difference. First operand 2184 states and 3359 transitions. Second operand 4 states. [2020-10-29 13:07:57,749 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:08:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:04,449 INFO L93 Difference]: Finished difference Result 4525 states and 7042 transitions. [2020-10-29 13:08:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:08:04,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-29 13:08:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:04,472 INFO L225 Difference]: With dead ends: 4525 [2020-10-29 13:08:04,472 INFO L226 Difference]: Without dead ends: 3931 [2020-10-29 13:08:04,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2020-10-29 13:08:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3928. [2020-10-29 13:08:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-10-29 13:08:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6051 transitions. [2020-10-29 13:08:04,617 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6051 transitions. Word has length 309 [2020-10-29 13:08:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:08:04,618 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 6051 transitions. [2020-10-29 13:08:04,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:08:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6051 transitions. [2020-10-29 13:08:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:08:04,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:08:04,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:08:04,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:08:04,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:08:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:08:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2100593853, now seen corresponding path program 1 times [2020-10-29 13:08:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:08:04,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285504659] [2020-10-29 13:08:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:08:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:05,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:05,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:09,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:09,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:08:09,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:08:09,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:08:09,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:09,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:08:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:08:09,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-29 13:08:09,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:10,932 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:08:10,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:10,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:10,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:10,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:10,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:08:10,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:10,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:10,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:11,115 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 13:08:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285504659] [2020-10-29 13:08:11,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:11,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:08:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603942786] [2020-10-29 13:08:11,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:08:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:08:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:11,118 INFO L87 Difference]: Start difference. First operand 3928 states and 6051 transitions. Second operand 5 states. [2020-10-29 13:08:20,889 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:08:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:23,603 INFO L93 Difference]: Finished difference Result 11603 states and 17857 transitions. [2020-10-29 13:08:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:08:23,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-29 13:08:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:23,641 INFO L225 Difference]: With dead ends: 11603 [2020-10-29 13:08:23,641 INFO L226 Difference]: Without dead ends: 7708 [2020-10-29 13:08:23,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:08:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2020-10-29 13:08:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7554. [2020-10-29 13:08:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7554 states. [2020-10-29 13:08:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11576 transitions. [2020-10-29 13:08:24,099 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11576 transitions. Word has length 309 [2020-10-29 13:08:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:08:24,099 INFO L481 AbstractCegarLoop]: Abstraction has 7554 states and 11576 transitions. [2020-10-29 13:08:24,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:08:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11576 transitions. [2020-10-29 13:08:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 13:08:24,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:08:24,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:08:24,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:08:24,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:08:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:08:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1689744882, now seen corresponding path program 1 times [2020-10-29 13:08:24,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:08:24,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651508816] [2020-10-29 13:08:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:08:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:24,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:24,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:24,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:24,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:26,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:29,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:29,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:08:29,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:08:29,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-29 13:08:29,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:30,342 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:08:30,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:30,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:30,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:30,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:08:30,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:30,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:30,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:30,511 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 13:08:30,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651508816] [2020-10-29 13:08:30,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:30,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:08:30,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631329108] [2020-10-29 13:08:30,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:08:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:08:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:08:30,513 INFO L87 Difference]: Start difference. First operand 7554 states and 11576 transitions. Second operand 4 states. [2020-10-29 13:08:40,735 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-29 13:08:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:43,411 INFO L93 Difference]: Finished difference Result 22223 states and 33988 transitions. [2020-10-29 13:08:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:08:43,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 311 [2020-10-29 13:08:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:43,474 INFO L225 Difference]: With dead ends: 22223 [2020-10-29 13:08:43,474 INFO L226 Difference]: Without dead ends: 14813 [2020-10-29 13:08:43,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14813 states. [2020-10-29 13:08:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14813 to 14667. [2020-10-29 13:08:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14667 states. [2020-10-29 13:08:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 22341 transitions. [2020-10-29 13:08:44,287 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 22341 transitions. Word has length 311 [2020-10-29 13:08:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:08:44,288 INFO L481 AbstractCegarLoop]: Abstraction has 14667 states and 22341 transitions. [2020-10-29 13:08:44,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:08:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 22341 transitions. [2020-10-29 13:08:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-29 13:08:44,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:08:44,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:08:44,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:08:44,318 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:08:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:08:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1459531799, now seen corresponding path program 1 times [2020-10-29 13:08:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:08:44,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534649843] [2020-10-29 13:08:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:08:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:44,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:45,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:49,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:08:49,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:08:49,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-29 13:08:49,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:50,338 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:08:50,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:50,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:50,503 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 13:08:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534649843] [2020-10-29 13:08:50,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:50,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:08:50,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104671198] [2020-10-29 13:08:50,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:08:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:08:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:50,505 INFO L87 Difference]: Start difference. First operand 14667 states and 22341 transitions. Second operand 5 states. [2020-10-29 13:08:59,590 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:09:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:09:02,529 INFO L93 Difference]: Finished difference Result 43331 states and 65923 transitions. [2020-10-29 13:09:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:09:02,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-10-29 13:09:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:09:02,599 INFO L225 Difference]: With dead ends: 43331 [2020-10-29 13:09:02,599 INFO L226 Difference]: Without dead ends: 28751 [2020-10-29 13:09:02,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:09:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28751 states. [2020-10-29 13:09:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28751 to 28505. [2020-10-29 13:09:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28505 states. [2020-10-29 13:09:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28505 states to 28505 states and 43179 transitions. [2020-10-29 13:09:03,993 INFO L78 Accepts]: Start accepts. Automaton has 28505 states and 43179 transitions. Word has length 311 [2020-10-29 13:09:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:09:03,993 INFO L481 AbstractCegarLoop]: Abstraction has 28505 states and 43179 transitions. [2020-10-29 13:09:03,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:09:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28505 states and 43179 transitions. [2020-10-29 13:09:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 13:09:04,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:09:04,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:09:04,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:09:04,049 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:09:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:09:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash 207567744, now seen corresponding path program 1 times [2020-10-29 13:09:04,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:09:04,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388304450] [2020-10-29 13:09:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:09:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:04,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:04,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:09,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:09:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:09:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 13:09:09,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:10,084 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:09:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:09:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:10,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:10,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:09:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:09:10,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:09:10,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:10,226 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 13:09:10,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388304450] [2020-10-29 13:09:10,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:09:10,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:09:10,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820599214] [2020-10-29 13:09:10,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:09:10,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:09:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:09:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:09:10,228 INFO L87 Difference]: Start difference. First operand 28505 states and 43179 transitions. Second operand 5 states. [2020-10-29 13:09:20,680 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:09:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:09:23,755 INFO L93 Difference]: Finished difference Result 84087 states and 127170 transitions. [2020-10-29 13:09:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:09:23,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-29 13:09:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:09:23,907 INFO L225 Difference]: With dead ends: 84087 [2020-10-29 13:09:23,907 INFO L226 Difference]: Without dead ends: 55785 [2020-10-29 13:09:23,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:09:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55785 states. [2020-10-29 13:09:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55785 to 55539. [2020-10-29 13:09:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55539 states. [2020-10-29 13:09:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55539 states to 55539 states and 83492 transitions. [2020-10-29 13:09:26,772 INFO L78 Accepts]: Start accepts. Automaton has 55539 states and 83492 transitions. Word has length 313 [2020-10-29 13:09:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:09:26,773 INFO L481 AbstractCegarLoop]: Abstraction has 55539 states and 83492 transitions. [2020-10-29 13:09:26,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:09:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 55539 states and 83492 transitions. [2020-10-29 13:09:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-29 13:09:26,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:09:26,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:09:26,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:09:26,845 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:09:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:09:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1325674979, now seen corresponding path program 1 times [2020-10-29 13:09:26,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:09:26,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514946841] [2020-10-29 13:09:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:09:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:26,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:28,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:28,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:31,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:31,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-29 13:09:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:32,871 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:09:32,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:09:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:32,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:09:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:09:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:09:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:33,021 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 13:09:33,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514946841] [2020-10-29 13:09:33,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:09:33,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:09:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922189590] [2020-10-29 13:09:33,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:09:33,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:09:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:09:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:09:33,024 INFO L87 Difference]: Start difference. First operand 55539 states and 83492 transitions. Second operand 5 states. [2020-10-29 13:09:44,757 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:09:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:09:48,782 INFO L93 Difference]: Finished difference Result 157926 states and 236994 transitions. [2020-10-29 13:09:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:09:48,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-29 13:09:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:09:48,954 INFO L225 Difference]: With dead ends: 157926 [2020-10-29 13:09:48,954 INFO L226 Difference]: Without dead ends: 102743 [2020-10-29 13:09:49,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:09:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102743 states. [2020-10-29 13:09:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102743 to 102605. [2020-10-29 13:09:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102605 states. [2020-10-29 13:09:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102605 states to 102605 states and 152929 transitions. [2020-10-29 13:09:54,532 INFO L78 Accepts]: Start accepts. Automaton has 102605 states and 152929 transitions. Word has length 315 [2020-10-29 13:09:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:09:54,532 INFO L481 AbstractCegarLoop]: Abstraction has 102605 states and 152929 transitions. [2020-10-29 13:09:54,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:09:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 102605 states and 152929 transitions. [2020-10-29 13:09:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 13:09:54,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:09:54,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:09:54,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:09:54,848 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:09:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:09:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash 720685421, now seen corresponding path program 1 times [2020-10-29 13:09:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:09:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546396079] [2020-10-29 13:09:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:09:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:54,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:56,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:59,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:09:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 13:09:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:10:00,925 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:10:00,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:10:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:00,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:00,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:10:00,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:10:00,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:10:00,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:00,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:10:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:10:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:10:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:10:01,106 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 13:10:01,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546396079] [2020-10-29 13:10:01,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:10:01,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:10:01,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347646194] [2020-10-29 13:10:01,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:10:01,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:10:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:10:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:10:01,108 INFO L87 Difference]: Start difference. First operand 102605 states and 152929 transitions. Second operand 4 states. [2020-10-29 13:10:16,355 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-29 13:10:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:10:22,104 INFO L93 Difference]: Finished difference Result 302399 states and 449928 transitions. [2020-10-29 13:10:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:10:22,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-29 13:10:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:10:22,694 INFO L225 Difference]: With dead ends: 302399 [2020-10-29 13:10:22,694 INFO L226 Difference]: Without dead ends: 201287 [2020-10-29 13:10:22,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:10:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201287 states. [2020-10-29 13:10:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201287 to 200947. [2020-10-29 13:10:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200947 states. [2020-10-29 13:10:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200947 states to 200947 states and 297530 transitions. [2020-10-29 13:10:33,726 INFO L78 Accepts]: Start accepts. Automaton has 200947 states and 297530 transitions. Word has length 317 [2020-10-29 13:10:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:10:33,727 INFO L481 AbstractCegarLoop]: Abstraction has 200947 states and 297530 transitions. [2020-10-29 13:10:33,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:10:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 200947 states and 297530 transitions. [2020-10-29 13:10:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 13:10:33,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:10:33,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:10:33,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:10:33,870 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:10:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:10:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 950898504, now seen corresponding path program 1 times [2020-10-29 13:10:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:10:33,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244678462] [2020-10-29 13:10:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:10:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:35,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:36,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:10:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 13:10:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:10:40,127 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:10:40,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:10:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:10:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:10:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:10:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:10:40,342 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 13:10:40,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244678462] [2020-10-29 13:10:40,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:10:40,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:10:40,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915702917] [2020-10-29 13:10:40,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:10:40,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:10:40,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:10:40,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:10:40,344 INFO L87 Difference]: Start difference. First operand 200947 states and 297530 transitions. Second operand 4 states.