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/Problem11_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:46,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:46,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:46,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:46,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:46,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:46,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:46,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:46,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:46,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:46,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:46,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:46,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:46,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:46,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:46,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:46,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:46,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:46,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:46,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:46,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:46,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:46,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:46,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:46,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:00:46,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:00:46,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:00:46,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:00:46,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:00:46,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:00:46,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:46,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:46,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:46,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:46,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:46,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:46,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:46,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:46,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:46,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:46,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:46,462 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 [2019-10-13 18:00:46,482 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:46,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:46,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:46,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:46,485 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:46,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:46,485 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:46,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:46,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:46,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:46,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:46,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:46,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:46,487 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:46,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:46,487 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:46,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:46,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:46,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:46,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:46,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:46,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:46,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:46,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:46,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:46,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:46,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:46,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:46,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:46,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:46,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:46,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:46,800 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:46,801 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:46,801 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label53.c [2019-10-13 18:00:46,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77df4d9c4/bcd9f2f9ca624ddb9900f7e5925a23b5/FLAG05ce35431 [2019-10-13 18:00:47,547 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:47,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label53.c [2019-10-13 18:00:47,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77df4d9c4/bcd9f2f9ca624ddb9900f7e5925a23b5/FLAG05ce35431 [2019-10-13 18:00:47,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77df4d9c4/bcd9f2f9ca624ddb9900f7e5925a23b5 [2019-10-13 18:00:47,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:47,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:47,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:47,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:47,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:47,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29dd0d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47, skipping insertion in model container [2019-10-13 18:00:47,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:47,773 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:48,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:48,297 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:48,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:48,612 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:48,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48 WrapperNode [2019-10-13 18:00:48,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:48,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:48,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:48,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:48,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (1/1) ... [2019-10-13 18:00:48,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:48,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:48,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:48,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:48,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (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 [2019-10-13 18:00:48,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:48,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:48,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:48,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:50,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:50,773 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:50,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:50 BoogieIcfgContainer [2019-10-13 18:00:50,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:50,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:50,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:50,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:50,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:47" (1/3) ... [2019-10-13 18:00:50,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224b7ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:50, skipping insertion in model container [2019-10-13 18:00:50,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:48" (2/3) ... [2019-10-13 18:00:50,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224b7ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:50, skipping insertion in model container [2019-10-13 18:00:50,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:50" (3/3) ... [2019-10-13 18:00:50,802 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label53.c [2019-10-13 18:00:50,815 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:50,826 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:50,841 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:50,886 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:50,886 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:50,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:50,887 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:50,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:50,887 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:50,887 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:50,888 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 18:00:50,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:50,942 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] [2019-10-13 18:00:50,947 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash 640789778, now seen corresponding path program 1 times [2019-10-13 18:00:50,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:50,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788714762] [2019-10-13 18:00:50,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:51,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788714762] [2019-10-13 18:00:51,522 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:51,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:51,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647150174] [2019-10-13 18:00:51,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:51,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:51,547 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:55,085 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-13 18:00:55,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:55,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-10-13 18:00:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:55,108 INFO L225 Difference]: With dead ends: 1009 [2019-10-13 18:00:55,108 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 18:00:55,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 18:00:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-13 18:00:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 18:00:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-13 18:00:55,226 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 53 [2019-10-13 18:00:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:55,227 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-13 18:00:55,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-13 18:00:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:00:55,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:55,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:55,235 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1201480114, now seen corresponding path program 1 times [2019-10-13 18:00:55,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:55,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525186045] [2019-10-13 18:00:55,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:55,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:55,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:55,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525186045] [2019-10-13 18:00:55,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:55,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:55,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721805383] [2019-10-13 18:00:55,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:55,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:55,652 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-13 18:00:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:58,730 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-13 18:00:58,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:58,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-13 18:00:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:58,752 INFO L225 Difference]: With dead ends: 2436 [2019-10-13 18:00:58,752 INFO L226 Difference]: Without dead ends: 1816 [2019-10-13 18:00:58,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-13 18:00:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-13 18:00:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-13 18:00:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2525 transitions. [2019-10-13 18:00:58,861 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2525 transitions. Word has length 125 [2019-10-13 18:00:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:58,862 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2525 transitions. [2019-10-13 18:00:58,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2525 transitions. [2019-10-13 18:00:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-13 18:00:58,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:58,877 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, 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] [2019-10-13 18:00:58,878 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -232900683, now seen corresponding path program 1 times [2019-10-13 18:00:58,879 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:58,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813653955] [2019-10-13 18:00:58,879 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,879 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:59,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813653955] [2019-10-13 18:00:59,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267032137] [2019-10-13 18:00:59,505 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 [2019-10-13 18:00:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:59,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:59,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 18:00:59,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:59,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 18:00:59,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24958385] [2019-10-13 18:00:59,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:59,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:59,868 INFO L87 Difference]: Start difference. First operand 1777 states and 2525 transitions. Second operand 5 states. [2019-10-13 18:01:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:01,533 INFO L93 Difference]: Finished difference Result 4179 states and 5943 transitions. [2019-10-13 18:01:01,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:01:01,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-10-13 18:01:01,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:01,549 INFO L225 Difference]: With dead ends: 4179 [2019-10-13 18:01:01,549 INFO L226 Difference]: Without dead ends: 2408 [2019-10-13 18:01:01,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:01:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2019-10-13 18:01:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2200. [2019-10-13 18:01:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2019-10-13 18:01:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3047 transitions. [2019-10-13 18:01:01,627 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3047 transitions. Word has length 228 [2019-10-13 18:01:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:01,628 INFO L462 AbstractCegarLoop]: Abstraction has 2200 states and 3047 transitions. [2019-10-13 18:01:01,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3047 transitions. [2019-10-13 18:01:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-10-13 18:01:01,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:01,635 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, 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] [2019-10-13 18:01:01,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:01,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -701389057, now seen corresponding path program 1 times [2019-10-13 18:01:01,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:01,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808202622] [2019-10-13 18:01:01,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:01,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:01,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 18:01:02,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808202622] [2019-10-13 18:01:02,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863672551] [2019-10-13 18:01:02,196 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 [2019-10-13 18:01:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 18:01:02,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:02,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:02,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:02,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 18:01:04,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:04,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-10-13 18:01:04,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183640330] [2019-10-13 18:01:04,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:01:04,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:01:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=88, Unknown=1, NotChecked=0, Total=132 [2019-10-13 18:01:04,737 INFO L87 Difference]: Start difference. First operand 2200 states and 3047 transitions. Second operand 12 states. [2019-10-13 18:01:09,399 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 34