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/Problem10_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:56:43,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:56:43,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:56:43,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:56:43,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:56:43,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:56:43,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:56:43,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:56:43,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:56:43,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:56:43,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:56:43,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:56:43,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:56:43,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:56:43,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:56:43,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:56:43,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:56:43,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:56:43,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:56:43,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:56:43,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:56:43,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:56:43,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:56:43,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:56:43,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:56:43,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:56:43,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:56:43,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:56:43,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:56:43,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:56:43,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:56:43,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:56:43,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:56:43,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:56:43,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:56:43,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:56:43,405 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 [2019-10-14 21:56:43,426 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:56:43,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:56:43,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:56:43,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:56:43,430 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:56:43,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:56:43,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:56:43,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:56:43,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:56:43,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:56:43,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:56:43,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:56:43,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:56:43,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:56:43,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:56:43,433 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:56:43,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:56:43,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:56:43,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:56:43,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:56:43,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:56:43,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:43,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:56:43,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:56:43,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:56:43,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:56:43,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:56:43,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:56:43,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:56:43,739 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:56:43,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:56:43,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:56:43,759 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:56:43,760 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:56:43,760 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-10-14 21:56:43,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/682284948/ca8cd8dc8f044406b73acf89437c1e76/FLAG6638826d4 [2019-10-14 21:56:44,446 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:56:44,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-10-14 21:56:44,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/682284948/ca8cd8dc8f044406b73acf89437c1e76/FLAG6638826d4 [2019-10-14 21:56:44,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/682284948/ca8cd8dc8f044406b73acf89437c1e76 [2019-10-14 21:56:44,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:56:44,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:56:44,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:44,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:56:44,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:56:44,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:44" (1/1) ... [2019-10-14 21:56:44,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:44, skipping insertion in model container [2019-10-14 21:56:44,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:44" (1/1) ... [2019-10-14 21:56:44,712 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:56:44,753 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:56:45,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:45,287 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:56:45,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:45,440 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:56:45,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45 WrapperNode [2019-10-14 21:56:45,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:45,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:56:45,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:56:45,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:56:45,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (1/1) ... [2019-10-14 21:56:45,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:56:45,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:56:45,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:56:45,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:56:45,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (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 [2019-10-14 21:56:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:56:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:56:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:56:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:56:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:56:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:56:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:56:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:56:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:56:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:56:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:56:46,960 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:56:46,960 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:56:46,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:46 BoogieIcfgContainer [2019-10-14 21:56:46,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:56:46,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:56:46,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:56:46,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:56:46,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:56:44" (1/3) ... [2019-10-14 21:56:46,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84aeedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:46, skipping insertion in model container [2019-10-14 21:56:46,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:45" (2/3) ... [2019-10-14 21:56:46,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84aeedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:46, skipping insertion in model container [2019-10-14 21:56:46,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:46" (3/3) ... [2019-10-14 21:56:46,970 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label11.c [2019-10-14 21:56:46,980 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:56:46,989 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:56:47,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:56:47,027 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:56:47,028 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:56:47,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:56:47,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:56:47,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:56:47,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:56:47,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:56:47,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:56:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:56:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:56:47,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:47,066 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:47,067 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1918215546, now seen corresponding path program 1 times [2019-10-14 21:56:47,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:47,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894200058] [2019-10-14 21:56:47,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:47,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:47,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:47,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894200058] [2019-10-14 21:56:47,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:47,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:56:47,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134673950] [2019-10-14 21:56:47,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:47,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:56:47,580 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:56:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:49,670 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-14 21:56:49,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:56:49,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-10-14 21:56:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:49,692 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:56:49,693 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:56:49,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:56:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:56:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-14 21:56:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-14 21:56:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-14 21:56:49,792 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 67 [2019-10-14 21:56:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:49,793 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-14 21:56:49,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:56:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-14 21:56:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 21:56:49,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:49,803 INFO L380 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, 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] [2019-10-14 21:56:49,803 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2016512505, now seen corresponding path program 1 times [2019-10-14 21:56:49,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:49,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956589410] [2019-10-14 21:56:49,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:49,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:49,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:50,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956589410] [2019-10-14 21:56:50,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238927331] [2019-10-14 21:56:50,242 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 [2019-10-14 21:56:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:56:50,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:50,484 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:56:50,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:56:50,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369891653] [2019-10-14 21:56:50,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:50,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:56:50,493 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 5 states. [2019-10-14 21:56:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:51,481 INFO L93 Difference]: Finished difference Result 1031 states and 1586 transitions. [2019-10-14 21:56:51,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:56:51,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-14 21:56:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:51,487 INFO L225 Difference]: With dead ends: 1031 [2019-10-14 21:56:51,488 INFO L226 Difference]: Without dead ends: 596 [2019-10-14 21:56:51,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:56:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-14 21:56:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2019-10-14 21:56:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-10-14 21:56:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 865 transitions. [2019-10-14 21:56:51,531 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 865 transitions. Word has length 186 [2019-10-14 21:56:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:51,532 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 865 transitions. [2019-10-14 21:56:51,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:56:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 865 transitions. [2019-10-14 21:56:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 21:56:51,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:51,538 INFO L380 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, 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] [2019-10-14 21:56:51,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:51,742 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1760446162, now seen corresponding path program 1 times [2019-10-14 21:56:51,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:51,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605778866] [2019-10-14 21:56:51,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:51,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:51,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:52,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605778866] [2019-10-14 21:56:52,221 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:52,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:56:52,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966664248] [2019-10-14 21:56:52,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:56:52,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:56:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:56:52,234 INFO L87 Difference]: Start difference. First operand 590 states and 865 transitions. Second operand 9 states. [2019-10-14 21:56:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:54,121 INFO L93 Difference]: Finished difference Result 1939 states and 3010 transitions. [2019-10-14 21:56:54,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:56:54,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 193 [2019-10-14 21:56:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:54,131 INFO L225 Difference]: With dead ends: 1939 [2019-10-14 21:56:54,131 INFO L226 Difference]: Without dead ends: 1355 [2019-10-14 21:56:54,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:56:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-10-14 21:56:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 894. [2019-10-14 21:56:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-14 21:56:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1190 transitions. [2019-10-14 21:56:54,179 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1190 transitions. Word has length 193 [2019-10-14 21:56:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:54,180 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1190 transitions. [2019-10-14 21:56:54,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:56:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1190 transitions. [2019-10-14 21:56:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 21:56:54,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:54,187 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:54,188 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1807493347, now seen corresponding path program 1 times [2019-10-14 21:56:54,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:54,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265635436] [2019-10-14 21:56:54,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:54,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:54,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:56:54,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265635436] [2019-10-14 21:56:54,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990394633] [2019-10-14 21:56:54,794 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 [2019-10-14 21:56:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:56:54,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:54,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:56:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:55,008 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:56:55,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-10-14 21:56:55,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576201956] [2019-10-14 21:56:55,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:56:55,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:56:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:56:55,010 INFO L87 Difference]: Start difference. First operand 894 states and 1190 transitions. Second operand 15 states. [2019-10-14 21:56:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:59,950 INFO L93 Difference]: Finished difference Result 2114 states and 2917 transitions. [2019-10-14 21:56:59,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:56:59,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 256 [2019-10-14 21:56:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:59,965 INFO L225 Difference]: With dead ends: 2114 [2019-10-14 21:56:59,965 INFO L226 Difference]: Without dead ends: 1369 [2019-10-14 21:56:59,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:56:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-10-14 21:57:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1051. [2019-10-14 21:57:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-10-14 21:57:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1323 transitions. [2019-10-14 21:57:00,056 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1323 transitions. Word has length 256 [2019-10-14 21:57:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:00,058 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1323 transitions. [2019-10-14 21:57:00,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:57:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1323 transitions. [2019-10-14 21:57:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-14 21:57:00,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:00,065 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:00,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:00,278 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:00,278 INFO L82 PathProgramCache]: Analyzing trace with hash 854527778, now seen corresponding path program 1 times [2019-10-14 21:57:00,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:00,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120563616] [2019-10-14 21:57:00,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:00,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:00,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:00,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120563616] [2019-10-14 21:57:00,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355511178] [2019-10-14 21:57:00,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:00,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:00,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:00,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:00,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114954704] [2019-10-14 21:57:00,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:00,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:00,856 INFO L87 Difference]: Start difference. First operand 1051 states and 1323 transitions. Second operand 11 states. [2019-10-14 21:57:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:04,180 INFO L93 Difference]: Finished difference Result 3243 states and 4611 transitions. [2019-10-14 21:57:04,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:57:04,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 271 [2019-10-14 21:57:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:04,192 INFO L225 Difference]: With dead ends: 3243 [2019-10-14 21:57:04,193 INFO L226 Difference]: Without dead ends: 1258 [2019-10-14 21:57:04,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:57:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-10-14 21:57:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1228. [2019-10-14 21:57:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-10-14 21:57:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1503 transitions. [2019-10-14 21:57:04,268 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1503 transitions. Word has length 271 [2019-10-14 21:57:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:04,273 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1503 transitions. [2019-10-14 21:57:04,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1503 transitions. [2019-10-14 21:57:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-14 21:57:04,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:04,281 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:04,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:04,486 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -550746410, now seen corresponding path program 1 times [2019-10-14 21:57:04,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:04,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645680784] [2019-10-14 21:57:04,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:04,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:04,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 120 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:57:04,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645680784] [2019-10-14 21:57:04,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132083119] [2019-10-14 21:57:04,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:57:04,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:57:04,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:04,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:57:04,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258346135] [2019-10-14 21:57:04,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:04,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:04,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:04,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:04,982 INFO L87 Difference]: Start difference. First operand 1228 states and 1503 transitions. Second operand 5 states. [2019-10-14 21:57:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:05,821 INFO L93 Difference]: Finished difference Result 2281 states and 2775 transitions. [2019-10-14 21:57:05,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:05,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2019-10-14 21:57:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:05,828 INFO L225 Difference]: With dead ends: 2281 [2019-10-14 21:57:05,829 INFO L226 Difference]: Without dead ends: 1218 [2019-10-14 21:57:05,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-14 21:57:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1196. [2019-10-14 21:57:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-10-14 21:57:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1370 transitions. [2019-10-14 21:57:05,866 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1370 transitions. Word has length 281 [2019-10-14 21:57:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:05,866 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1370 transitions. [2019-10-14 21:57:05,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1370 transitions. [2019-10-14 21:57:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-10-14 21:57:05,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:05,875 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:06,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:06,087 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:06,088 INFO L82 PathProgramCache]: Analyzing trace with hash 348873925, now seen corresponding path program 1 times [2019-10-14 21:57:06,088 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:06,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827235693] [2019-10-14 21:57:06,088 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:06,088 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:06,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 305 proven. 71 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:57:07,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827235693] [2019-10-14 21:57:07,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208594256] [2019-10-14 21:57:07,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:57:07,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:07,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:07,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:14,348 WARN L191 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-10-14 21:57:14,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:14,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:57:14,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:14,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-10-14 21:57:14,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140453550] [2019-10-14 21:57:14,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:57:14,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:57:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:57:14,698 INFO L87 Difference]: Start difference. First operand 1196 states and 1370 transitions. Second operand 24 states.