/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:10:58,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:10:58,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:10:58,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:10:58,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:10:58,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:10:58,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:10:58,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:10:58,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:10:58,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:10:58,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:10:58,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:10:58,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:10:58,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:10:58,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:10:58,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:10:58,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:10:58,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:10:58,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:10:58,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:10:58,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:10:58,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:10:58,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:10:58,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:10:58,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:10:58,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:10:58,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:10:58,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:10:58,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:10:58,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:10:58,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:10:58,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:10:58,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:10:59,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:10:59,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:10:59,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:10:59,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:10:59,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:10:59,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:10:59,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:10:59,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:10:59,005 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 [2020-10-13 10:10:59,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:10:59,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:10:59,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:10:59,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:10:59,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:10:59,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:10:59,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:10:59,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:10:59,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:10:59,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:10:59,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:10:59,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:10:59,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:10:59,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:10:59,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:10:59,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:10:59,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:10:59,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:10:59,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:10:59,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:10:59,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:10:59,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:10:59,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:10:59,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:10:59,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:10:59,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:10:59,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:10:59,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:10:59,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:10:59,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:10:59,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:10:59,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:10:59,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:10:59,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:10:59,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:10:59,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-13 10:10:59,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ca2ce72/2b27559d795a4522bc5b7caf428c4b8e/FLAG37a1c2710 [2020-10-13 10:11:00,440 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:11:00,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-13 10:11:00,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ca2ce72/2b27559d795a4522bc5b7caf428c4b8e/FLAG37a1c2710 [2020-10-13 10:11:00,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ca2ce72/2b27559d795a4522bc5b7caf428c4b8e [2020-10-13 10:11:00,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:11:00,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:11:00,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:11:00,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:11:00,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:11:00,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:11:00" (1/1) ... [2020-10-13 10:11:00,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14fb4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:00, skipping insertion in model container [2020-10-13 10:11:00,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:11:00" (1/1) ... [2020-10-13 10:11:00,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:11:01,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:11:03,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:11:03,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:11:04,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:11:04,763 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:11:04,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04 WrapperNode [2020-10-13 10:11:04,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:11:04,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:11:04,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:11:04,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:11:04,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:04,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:04,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:04,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:05,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:05,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:05,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (1/1) ... [2020-10-13 10:11:05,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:11:05,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:11:05,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:11:05,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:11:05,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (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 [2020-10-13 10:11:05,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:11:05,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:11:05,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:11:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:11:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:11:05,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:11:05,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:11:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:11:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:11:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:11:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:11:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:11:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:11:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:11:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:11:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:11:18,035 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:11:18,036 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:11:18,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:11:18 BoogieIcfgContainer [2020-10-13 10:11:18,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:11:18,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:11:18,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:11:18,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:11:18,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:11:00" (1/3) ... [2020-10-13 10:11:18,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6845b727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:11:18, skipping insertion in model container [2020-10-13 10:11:18,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:04" (2/3) ... [2020-10-13 10:11:18,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6845b727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:11:18, skipping insertion in model container [2020-10-13 10:11:18,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:11:18" (3/3) ... [2020-10-13 10:11:18,064 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2020-10-13 10:11:18,076 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:11:18,086 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:11:18,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:11:18,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:11:18,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:11:18,135 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:11:18,135 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:11:18,135 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:11:18,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:11:18,136 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:11:18,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:11:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:11:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:11:18,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:18,198 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] [2020-10-13 10:11:18,198 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash 578579204, now seen corresponding path program 1 times [2020-10-13 10:11:18,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:18,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287949672] [2020-10-13 10:11:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:18,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:18,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:11:18,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-13 10:11:18,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:11:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:11:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:11:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 10:11:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:18,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:18,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:18,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:11:18,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:18,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:11:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:18,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287949672] [2020-10-13 10:11:18,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:11:18,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:11:18,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622487809] [2020-10-13 10:11:18,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:11:18,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:11:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:11:18,937 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:11:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:45,434 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-13 10:11:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:45,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:11:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:45,493 INFO L225 Difference]: With dead ends: 5031 [2020-10-13 10:11:45,493 INFO L226 Difference]: Without dead ends: 3190 [2020-10-13 10:11:45,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-13 10:11:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-13 10:11:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-13 10:11:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-13 10:11:45,727 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 23 [2020-10-13 10:11:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:45,728 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-13 10:11:45,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:11:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-13 10:11:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:11:45,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:45,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:11:45,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:11:45,736 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash 803657603, now seen corresponding path program 1 times [2020-10-13 10:11:45,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:45,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127708717] [2020-10-13 10:11:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:47,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:47,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:47,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:11:47,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:11:47,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2022 [2020-10-13 10:11:47,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:11:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:11:47,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:11:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:48,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:11:48,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:48,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:48,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:48,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:48,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:11:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 10:11:48,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:11:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:11:48,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:48,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127708717] [2020-10-13 10:11:48,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:11:48,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:11:48,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347265463] [2020-10-13 10:11:48,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:48,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:48,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:48,283 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-13 10:12:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:27,427 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-13 10:12:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:27,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-13 10:12:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:27,473 INFO L225 Difference]: With dead ends: 9218 [2020-10-13 10:12:27,474 INFO L226 Difference]: Without dead ends: 6040 [2020-10-13 10:12:27,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:12:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-13 10:12:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-13 10:12:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:12:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8357 transitions. [2020-10-13 10:12:27,692 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8357 transitions. Word has length 96 [2020-10-13 10:12:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:27,693 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8357 transitions. [2020-10-13 10:12:27,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:12:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8357 transitions. [2020-10-13 10:12:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:12:27,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:27,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:12:27,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:12:27,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1022512321, now seen corresponding path program 1 times [2020-10-13 10:12:27,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:27,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893877706] [2020-10-13 10:12:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:28,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:28,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:12:28,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:12:28,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-13 10:12:28,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:12:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:12:28,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:12:28,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:28,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:28,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:28,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:28,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:28,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:28,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:12:28,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:28,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:28,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:28,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:28,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:29,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:29,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:12:29,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:29,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 10:12:29,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:29,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:12:29,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:29,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893877706] [2020-10-13 10:12:29,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:12:29,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:12:29,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691067144] [2020-10-13 10:12:29,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:12:29,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:29,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:12:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:12:29,188 INFO L87 Difference]: Start difference. First operand 6024 states and 8357 transitions. Second operand 5 states. [2020-10-13 10:13:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:13:25,972 INFO L93 Difference]: Finished difference Result 14872 states and 21399 transitions. [2020-10-13 10:13:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:13:25,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-13 10:13:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:13:26,032 INFO L225 Difference]: With dead ends: 14872 [2020-10-13 10:13:26,033 INFO L226 Difference]: Without dead ends: 8854 [2020-10-13 10:13:26,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:13:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2020-10-13 10:13:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8845. [2020-10-13 10:13:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8845 states. [2020-10-13 10:13:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 11623 transitions. [2020-10-13 10:13:26,394 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 11623 transitions. Word has length 96 [2020-10-13 10:13:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:13:26,403 INFO L479 AbstractCegarLoop]: Abstraction has 8845 states and 11623 transitions. [2020-10-13 10:13:26,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:13:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 11623 transitions. [2020-10-13 10:13:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:13:26,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:13:26,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:13:26,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:13:26,411 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:13:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:13:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash -623473094, now seen corresponding path program 1 times [2020-10-13 10:13:26,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:13:26,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337860464] [2020-10-13 10:13:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:13:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:26,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:13:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:13:27,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-13 10:13:27,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:13:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:13:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:13:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:13:27,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:13:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:13:27,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:27,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:13:27,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:13:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:27,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:13:27,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:13:27,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:13:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-13 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:13:27,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337860464] [2020-10-13 10:13:27,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:13:27,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:13:27,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99926971] [2020-10-13 10:13:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:13:27,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:13:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:13:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:13:27,965 INFO L87 Difference]: Start difference. First operand 8845 states and 11623 transitions. Second operand 5 states. [2020-10-13 10:14:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:14:26,427 INFO L93 Difference]: Finished difference Result 26193 states and 34881 transitions. [2020-10-13 10:14:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:14:26,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-13 10:14:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:14:26,493 INFO L225 Difference]: With dead ends: 26193 [2020-10-13 10:14:26,493 INFO L226 Difference]: Without dead ends: 17354 [2020-10-13 10:14:26,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:14:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17354 states. [2020-10-13 10:14:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17354 to 17305. [2020-10-13 10:14:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17305 states. [2020-10-13 10:14:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17305 states to 17305 states and 21488 transitions. [2020-10-13 10:14:26,914 INFO L78 Accepts]: Start accepts. Automaton has 17305 states and 21488 transitions. Word has length 104 [2020-10-13 10:14:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:14:26,917 INFO L479 AbstractCegarLoop]: Abstraction has 17305 states and 21488 transitions. [2020-10-13 10:14:26,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:14:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 17305 states and 21488 transitions. [2020-10-13 10:14:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 10:14:26,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:14:26,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:14:26,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:14:26,928 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:14:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:14:26,929 INFO L82 PathProgramCache]: Analyzing trace with hash 194005264, now seen corresponding path program 1 times [2020-10-13 10:14:26,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:14:26,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732166735] [2020-10-13 10:14:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:14:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:27,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:27,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:14:27,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:14:27,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-13 10:14:27,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:27,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:14:27,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:14:27,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:14:27,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:27,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:14:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:27,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:27,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:14:28,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:28,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:14:28,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:14:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:14:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:28,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:14:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:28,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:28,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:14:28,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:28,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-13 10:14:28,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:14:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:14:28,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:14:28,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732166735] [2020-10-13 10:14:28,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:14:28,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:14:28,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536984231] [2020-10-13 10:14:28,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:14:28,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:14:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:14:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:14:28,283 INFO L87 Difference]: Start difference. First operand 17305 states and 21488 transitions. Second operand 5 states.