/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:26:30,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:26:30,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:26:30,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:26:30,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:26:30,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:26:30,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:26:30,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:26:30,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:26:30,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:26:30,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:26:30,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:26:30,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:26:30,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:26:30,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:26:30,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:26:30,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:26:30,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:26:30,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:26:30,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:26:30,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:26:30,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:26:30,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:26:30,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:26:30,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:26:30,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:26:30,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:26:30,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:26:30,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:26:30,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:26:30,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:26:30,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:26:30,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:26:30,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:26:30,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:26:30,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:26:30,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:26:30,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:26:30,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:26:30,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:26:30,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:26:30,493 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 [2020-10-27 19:26:30,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:26:30,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:26:30,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:26:30,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:26:30,586 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:26:30,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:26:30,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:26:30,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:26:30,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:26:30,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:26:30,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:26:30,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:26:30,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:26:30,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:26:30,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:26:30,590 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:26:30,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:26:30,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:26:30,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:26:30,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:26:30,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:26:30,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:26:30,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:26:30,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:26:30,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:26:30,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:26:30,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:26:30,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:26:30,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:26:30,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:26:31,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:26:31,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:26:31,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:26:31,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:26:31,246 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:26:31,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label28.c [2020-10-27 19:26:31,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5affe8c1/65720d051f144296bfdf77a3f56836f2/FLAG7aac708f8 [2020-10-27 19:26:32,900 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:26:32,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label28.c [2020-10-27 19:26:32,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5affe8c1/65720d051f144296bfdf77a3f56836f2/FLAG7aac708f8 [2020-10-27 19:26:33,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5affe8c1/65720d051f144296bfdf77a3f56836f2 [2020-10-27 19:26:33,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:26:33,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:26:33,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:26:33,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:26:33,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:26:33,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:26:33" (1/1) ... [2020-10-27 19:26:33,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:33, skipping insertion in model container [2020-10-27 19:26:33,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:26:33" (1/1) ... [2020-10-27 19:26:33,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:26:33,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:26:35,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:26:36,020 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:26:37,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:26:37,504 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:26:37,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37 WrapperNode [2020-10-27 19:26:37,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:26:37,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:26:37,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:26:37,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:26:37,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:37,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:37,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:37,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:38,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:38,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:38,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (1/1) ... [2020-10-27 19:26:38,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:26:38,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:26:38,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:26:38,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:26:38,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (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 [2020-10-27 19:26:38,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:26:38,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:26:38,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:26:38,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:26:38,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:26:38,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:26:38,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:26:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:26:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:26:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:26:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:26:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:26:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:26:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:26:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:26:38,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:26:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:26:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:26:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:26:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:26:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:26:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:26:38,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:26:38,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:26:57,730 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:26:57,733 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:26:57,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:26:57 BoogieIcfgContainer [2020-10-27 19:26:57,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:26:57,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:26:57,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:26:57,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:26:57,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:26:33" (1/3) ... [2020-10-27 19:26:57,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2a6be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:26:57, skipping insertion in model container [2020-10-27 19:26:57,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:26:37" (2/3) ... [2020-10-27 19:26:57,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2a6be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:26:57, skipping insertion in model container [2020-10-27 19:26:57,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:26:57" (3/3) ... [2020-10-27 19:26:57,752 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2020-10-27 19:26:57,769 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:26:57,781 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:26:57,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:26:57,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:26:57,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:26:57,849 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:26:57,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:26:57,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:26:57,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:26:57,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:26:57,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:26:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:26:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:26:58,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:26:58,013 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] [2020-10-27 19:26:58,013 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:26:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:26:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 776129933, now seen corresponding path program 1 times [2020-10-27 19:26:58,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:26:58,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663553464] [2020-10-27 19:26:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:26:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:59,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:59,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:26:59,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:59,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-27 19:26:59,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:59,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:26:59,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:26:59,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:26:59,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 19:26:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:26:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:59,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:59,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:26:59,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 19:26:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:26:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:26:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:26:59,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663553464] [2020-10-27 19:26:59,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:26:59,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:26:59,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873131838] [2020-10-27 19:26:59,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:26:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:26:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:26:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:26:59,324 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:27:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:27:31,711 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 19:27:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:27:31,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 19:27:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:27:31,766 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 19:27:31,766 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 19:27:31,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:27:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 19:27:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 19:27:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 19:27:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 19:27:32,050 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 30 [2020-10-27 19:27:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:27:32,051 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 19:27:32,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:27:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 19:27:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 19:27:32,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:27:32,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:27:32,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:27:32,057 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:27:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:27:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash 10325299, now seen corresponding path program 1 times [2020-10-27 19:27:32,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:27:32,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493455897] [2020-10-27 19:27:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:27:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:33,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:33,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 19:27:33,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:27:33,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-27 19:27:33,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:27:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:27:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:27:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:27:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:27:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:33,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:33,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:27:33,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:33,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:27:33,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:33,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:27:33,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:33,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:27:33,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:33,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:27:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:33,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:33,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:33,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:27:33,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:33,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 19:27:33,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:33,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:27:33,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:27:33,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:27:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:27:34,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493455897] [2020-10-27 19:27:34,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:27:34,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:27:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599439438] [2020-10-27 19:27:34,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:27:34,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:27:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:27:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:27:34,058 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 5 states. [2020-10-27 19:28:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:28:09,696 INFO L93 Difference]: Finished difference Result 7888 states and 13865 transitions. [2020-10-27 19:28:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:28:09,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-27 19:28:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:28:09,728 INFO L225 Difference]: With dead ends: 7888 [2020-10-27 19:28:09,728 INFO L226 Difference]: Without dead ends: 4694 [2020-10-27 19:28:09,738 INFO L677 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 [2020-10-27 19:28:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2020-10-27 19:28:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4627. [2020-10-27 19:28:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4627 states. [2020-10-27 19:28:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 8168 transitions. [2020-10-27 19:28:09,911 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 8168 transitions. Word has length 102 [2020-10-27 19:28:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:28:09,914 INFO L481 AbstractCegarLoop]: Abstraction has 4627 states and 8168 transitions. [2020-10-27 19:28:09,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:28:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 8168 transitions. [2020-10-27 19:28:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 19:28:09,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:28:09,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:28:09,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:28:09,927 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:28:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:28:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1208723772, now seen corresponding path program 1 times [2020-10-27 19:28:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:28:09,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772467656] [2020-10-27 19:28:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:28:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:10,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:11,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:11,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 19:28:11,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:28:11,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-27 19:28:11,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:28:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 19:28:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:28:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:11,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:28:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:11,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:11,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:28:11,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:11,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:28:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:28:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:28:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:11,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:11,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:11,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:28:11,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 19:28:11,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:28:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:28:11,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:28:11,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772467656] [2020-10-27 19:28:11,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:28:11,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:28:11,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467540819] [2020-10-27 19:28:11,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:28:11,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:28:11,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:28:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:28:11,510 INFO L87 Difference]: Start difference. First operand 4627 states and 8168 transitions. Second operand 5 states. [2020-10-27 19:28:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:28:59,757 INFO L93 Difference]: Finished difference Result 13529 states and 24235 transitions. [2020-10-27 19:28:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:28:59,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-27 19:28:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:28:59,816 INFO L225 Difference]: With dead ends: 13529 [2020-10-27 19:28:59,816 INFO L226 Difference]: Without dead ends: 8908 [2020-10-27 19:28:59,831 INFO L677 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 [2020-10-27 19:28:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2020-10-27 19:29:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8894. [2020-10-27 19:29:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8894 states. [2020-10-27 19:29:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 14161 transitions. [2020-10-27 19:29:00,126 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 14161 transitions. Word has length 105 [2020-10-27 19:29:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:29:00,130 INFO L481 AbstractCegarLoop]: Abstraction has 8894 states and 14161 transitions. [2020-10-27 19:29:00,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:29:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 14161 transitions. [2020-10-27 19:29:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 19:29:00,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:29:00,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:29:00,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:29:00,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:29:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:29:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash -187574824, now seen corresponding path program 1 times [2020-10-27 19:29:00,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:29:00,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633271686] [2020-10-27 19:29:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:29:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:29:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:29:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:29:00,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:29:00,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 19:29:00,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:29:00,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-27 19:29:00,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:29:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:29:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:29:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:29:00,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:29:01,275 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:29:01,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:29:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:29:01,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:29:01,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:29:01,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:29:01,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:29:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:29:01,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:29:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:29:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:29:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:29:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:29:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:29:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:29:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:29:01,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:29:01,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:29:01,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:29:01,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 19:29:01,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:29:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:29:01,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:29:01,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:29:01,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:29:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:29:01,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633271686] [2020-10-27 19:29:01,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:29:01,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:29:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286034972] [2020-10-27 19:29:01,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:29:01,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:29:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:29:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:29:01,550 INFO L87 Difference]: Start difference. First operand 8894 states and 14161 transitions. Second operand 6 states. [2020-10-27 19:29:01,700 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 19:30:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:30:26,978 INFO L93 Difference]: Finished difference Result 34698 states and 57127 transitions. [2020-10-27 19:30:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:30:26,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-27 19:30:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:30:27,155 INFO L225 Difference]: With dead ends: 34698 [2020-10-27 19:30:27,155 INFO L226 Difference]: Without dead ends: 25810 [2020-10-27 19:30:27,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:30:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25810 states. [2020-10-27 19:30:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25810 to 25792. [2020-10-27 19:30:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25792 states. [2020-10-27 19:30:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25792 states to 25792 states and 37612 transitions. [2020-10-27 19:30:28,230 INFO L78 Accepts]: Start accepts. Automaton has 25792 states and 37612 transitions. Word has length 111 [2020-10-27 19:30:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:30:28,233 INFO L481 AbstractCegarLoop]: Abstraction has 25792 states and 37612 transitions. [2020-10-27 19:30:28,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:30:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25792 states and 37612 transitions. [2020-10-27 19:30:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:30:28,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:30:28,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:30:28,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:30:28,242 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:30:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:30:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2026188621, now seen corresponding path program 1 times [2020-10-27 19:30:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:30:28,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773879782] [2020-10-27 19:30:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:30:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:28,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:29,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:29,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 19:30:29,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:30:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-27 19:30:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:30:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 19:30:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:30:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:30:30,108 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:30:30,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:30:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:30,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:30,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:30:30,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 19:30:30,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:30:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:30:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:30:30,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:30:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:30:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:30:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:30:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:30:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 19:30:30,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:30:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 19:30:30,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:30:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:30:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:30:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 19:30:30,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:30:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:30:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773879782] [2020-10-27 19:30:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:30:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:30:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245396132] [2020-10-27 19:30:30,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:30:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:30:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:30:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:30:30,675 INFO L87 Difference]: Start difference. First operand 25792 states and 37612 transitions. Second operand 5 states.