/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:32,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:32,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:32,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:16:32,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:16:32,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:16:32,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:16:32,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:16:32,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:16:32,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:16:32,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:16:32,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:16:32,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:32,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:32,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:32,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:32,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:32,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:32,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:32,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:32,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:32,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:32,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:32,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:32,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:16:32,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:16:32,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:16:32,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:16:32,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:16:32,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:16:32,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:16:32,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:16:32,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:16:32,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:16:32,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:16:32,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:16:32,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:16:32,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:16:32,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:32,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:32,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:32,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:16:32,828 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:32,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:32,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:32,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:32,830 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:32,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:32,830 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:32,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:32,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:32,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:32,832 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:32,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:32,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:32,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:32,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:32,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:32,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:32,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:32,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:32,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:32,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:32,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:32,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:32,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:33,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:33,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:33,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:33,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:33,126 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:33,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-11-06 19:16:33,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780812e12/1ec492550ca74ed6847d3c67715ebf79/FLAG97a401840 [2019-11-06 19:16:33,900 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:33,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-11-06 19:16:33,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780812e12/1ec492550ca74ed6847d3c67715ebf79/FLAG97a401840 [2019-11-06 19:16:34,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780812e12/1ec492550ca74ed6847d3c67715ebf79 [2019-11-06 19:16:34,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:34,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:34,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:34,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:34,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:34,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:34" (1/1) ... [2019-11-06 19:16:34,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6b97bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:34, skipping insertion in model container [2019-11-06 19:16:34,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:34" (1/1) ... [2019-11-06 19:16:34,074 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:34,173 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:35,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:35,217 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:35,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:35,581 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:35,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35 WrapperNode [2019-11-06 19:16:35,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:35,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:35,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:35,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:35,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... [2019-11-06 19:16:35,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:35,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:35,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:35,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:35,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-11-06 19:16:35,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:16:35,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:16:35,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:16:35,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:16:35,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:16:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:16:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:16:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:16:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:16:35,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:16:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:16:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:16:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:16:39,852 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:16:39,852 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:16:39,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:39 BoogieIcfgContainer [2019-11-06 19:16:39,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:16:39,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:16:39,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:16:39,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:16:39,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:34" (1/3) ... [2019-11-06 19:16:39,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2a221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:39, skipping insertion in model container [2019-11-06 19:16:39,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:35" (2/3) ... [2019-11-06 19:16:39,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2a221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:39, skipping insertion in model container [2019-11-06 19:16:39,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:39" (3/3) ... [2019-11-06 19:16:39,863 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2019-11-06 19:16:39,873 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:16:39,882 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:16:39,891 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:16:39,921 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:16:39,922 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:16:39,922 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:16:39,922 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:16:39,922 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:16:39,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:16:39,923 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:16:39,923 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:16:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:16:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 19:16:39,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:39,962 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:39,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash 54256576, now seen corresponding path program 1 times [2019-11-06 19:16:39,980 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:39,980 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784236521] [2019-11-06 19:16:39,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:40,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784236521] [2019-11-06 19:16:40,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:40,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:16:40,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463023155] [2019-11-06 19:16:40,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:40,421 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:16:40,438 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:47,449 INFO L93 Difference]: Finished difference Result 1525 states and 2796 transitions. [2019-11-06 19:16:47,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:47,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 19:16:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:47,480 INFO L225 Difference]: With dead ends: 1525 [2019-11-06 19:16:47,480 INFO L226 Difference]: Without dead ends: 1020 [2019-11-06 19:16:47,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-11-06 19:16:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1014. [2019-11-06 19:16:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2019-11-06 19:16:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1536 transitions. [2019-11-06 19:16:47,651 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1536 transitions. Word has length 46 [2019-11-06 19:16:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:47,652 INFO L462 AbstractCegarLoop]: Abstraction has 1014 states and 1536 transitions. [2019-11-06 19:16:47,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1536 transitions. [2019-11-06 19:16:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 19:16:47,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:47,661 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:16:47,662 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1513205916, now seen corresponding path program 1 times [2019-11-06 19:16:47,663 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:47,663 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685894997] [2019-11-06 19:16:47,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:47,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685894997] [2019-11-06 19:16:47,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:47,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:16:47,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642017206] [2019-11-06 19:16:47,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:16:47,996 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:16:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:47,997 INFO L87 Difference]: Start difference. First operand 1014 states and 1536 transitions. Second operand 7 states. [2019-11-06 19:16:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:53,396 INFO L93 Difference]: Finished difference Result 3014 states and 4633 transitions. [2019-11-06 19:16:53,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:16:53,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-11-06 19:16:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:53,411 INFO L225 Difference]: With dead ends: 3014 [2019-11-06 19:16:53,412 INFO L226 Difference]: Without dead ends: 2006 [2019-11-06 19:16:53,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:16:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2019-11-06 19:16:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1970. [2019-11-06 19:16:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1970 states. [2019-11-06 19:16:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 2632 transitions. [2019-11-06 19:16:53,501 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 2632 transitions. Word has length 162 [2019-11-06 19:16:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:53,503 INFO L462 AbstractCegarLoop]: Abstraction has 1970 states and 2632 transitions. [2019-11-06 19:16:53,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:16:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 2632 transitions. [2019-11-06 19:16:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-11-06 19:16:53,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:53,518 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:53,518 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:53,519 INFO L82 PathProgramCache]: Analyzing trace with hash 899976135, now seen corresponding path program 1 times [2019-11-06 19:16:53,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:53,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022156413] [2019-11-06 19:16:53,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 138 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:16:54,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022156413] [2019-11-06 19:16:54,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243038503] [2019-11-06 19:16:54,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:54,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 19:16:54,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:55,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:16:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 19:16:55,319 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:55,319 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-11-06 19:16:55,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854831019] [2019-11-06 19:16:55,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:55,324 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:16:55,333 INFO L87 Difference]: Start difference. First operand 1970 states and 2632 transitions. Second operand 5 states. [2019-11-06 19:16:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:58,779 INFO L93 Difference]: Finished difference Result 4290 states and 5667 transitions. [2019-11-06 19:16:58,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:58,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2019-11-06 19:16:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:58,804 INFO L225 Difference]: With dead ends: 4290 [2019-11-06 19:16:58,804 INFO L226 Difference]: Without dead ends: 2326 [2019-11-06 19:16:58,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 330 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:16:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2019-11-06 19:16:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2294. [2019-11-06 19:16:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2294 states. [2019-11-06 19:16:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2971 transitions. [2019-11-06 19:16:58,889 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2971 transitions. Word has length 326 [2019-11-06 19:16:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:58,892 INFO L462 AbstractCegarLoop]: Abstraction has 2294 states and 2971 transitions. [2019-11-06 19:16:58,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2971 transitions. [2019-11-06 19:16:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-11-06 19:16:58,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:58,900 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:59,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:59,109 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1774073790, now seen corresponding path program 1 times [2019-11-06 19:16:59,110 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:59,110 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641326375] [2019-11-06 19:16:59,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:16:59,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641326375] [2019-11-06 19:16:59,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727678647] [2019-11-06 19:16:59,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:59,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:59,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:00,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:17:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:00,197 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:00,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-06 19:17:00,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180700902] [2019-11-06 19:17:00,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 19:17:00,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 19:17:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:17:00,200 INFO L87 Difference]: Start difference. First operand 2294 states and 2971 transitions. Second operand 10 states.