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/Problem19_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 23:08:01,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 23:08:01,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 23:08:01,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 23:08:01,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 23:08:01,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 23:08:01,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 23:08:01,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 23:08:01,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 23:08:01,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 23:08:01,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 23:08:01,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 23:08:01,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 23:08:01,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 23:08:01,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 23:08:01,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 23:08:01,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 23:08:01,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 23:08:01,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 23:08:01,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 23:08:01,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 23:08:01,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 23:08:01,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 23:08:01,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 23:08:01,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 23:08:01,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 23:08:01,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 23:08:01,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 23:08:01,457 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 [2019-09-07 23:08:01,471 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 23:08:01,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 23:08:01,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 23:08:01,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 23:08:01,473 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 23:08:01,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 23:08:01,474 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 23:08:01,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 23:08:01,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 23:08:01,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 23:08:01,475 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 23:08:01,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 23:08:01,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 23:08:01,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 23:08:01,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 23:08:01,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 23:08:01,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 23:08:01,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 23:08:01,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 23:08:01,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 23:08:01,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 23:08:01,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 23:08:01,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 23:08:01,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 23:08:01,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 23:08:01,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 23:08:01,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 23:08:01,532 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 23:08:01,532 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 23:08:01,533 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2019-09-07 23:08:01,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b90a9c95/9f9965901ce745e9805c1f297aaa6407/FLAG47a7a5564 [2019-09-07 23:08:02,526 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 23:08:02,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2019-09-07 23:08:02,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b90a9c95/9f9965901ce745e9805c1f297aaa6407/FLAG47a7a5564 [2019-09-07 23:08:02,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b90a9c95/9f9965901ce745e9805c1f297aaa6407 [2019-09-07 23:08:02,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 23:08:02,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 23:08:02,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 23:08:02,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 23:08:02,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 23:08:02,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:08:02" (1/1) ... [2019-09-07 23:08:02,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb7ab14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:02, skipping insertion in model container [2019-09-07 23:08:02,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:08:02" (1/1) ... [2019-09-07 23:08:02,971 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 23:08:03,161 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 23:08:05,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 23:08:05,652 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 23:08:06,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 23:08:06,880 INFO L192 MainTranslator]: Completed translation [2019-09-07 23:08:06,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06 WrapperNode [2019-09-07 23:08:06,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 23:08:06,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 23:08:06,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 23:08:06,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 23:08:06,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:06,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:06,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:06,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:07,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:07,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:07,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (1/1) ... [2019-09-07 23:08:07,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 23:08:07,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 23:08:07,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 23:08:07,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 23:08:07,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (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 [2019-09-07 23:08:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 23:08:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 23:08:07,350 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-07 23:08:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-07 23:08:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-07 23:08:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-07 23:08:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-07 23:08:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-07 23:08:07,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 23:08:07,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-07 23:08:07,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-07 23:08:07,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-07 23:08:07,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-07 23:08:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-07 23:08:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-07 23:08:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 23:08:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 23:08:07,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-07 23:08:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 23:08:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 23:08:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 23:08:17,816 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 23:08:17,817 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-07 23:08:17,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:08:17 BoogieIcfgContainer [2019-09-07 23:08:17,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 23:08:17,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 23:08:17,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 23:08:17,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 23:08:17,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:08:02" (1/3) ... [2019-09-07 23:08:17,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3d7183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:08:17, skipping insertion in model container [2019-09-07 23:08:17,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:08:06" (2/3) ... [2019-09-07 23:08:17,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3d7183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:08:17, skipping insertion in model container [2019-09-07 23:08:17,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:08:17" (3/3) ... [2019-09-07 23:08:17,844 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2019-09-07 23:08:17,860 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 23:08:17,880 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 23:08:17,905 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 23:08:17,983 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 23:08:17,984 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 23:08:17,984 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 23:08:17,984 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 23:08:17,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 23:08:17,985 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 23:08:17,985 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 23:08:17,985 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 23:08:17,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 23:08:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-07 23:08:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 23:08:18,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:08:18,070 INFO L399 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] [2019-09-07 23:08:18,073 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:08:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:08:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash 692192756, now seen corresponding path program 1 times [2019-09-07 23:08:18,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:08:18,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:08:18,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:18,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:08:18,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:08:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:08:18,475 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:08:18,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 23:08:18,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 23:08:18,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 23:08:18,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 23:08:18,497 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-07 23:08:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:08:29,017 INFO L93 Difference]: Finished difference Result 5046 states and 9510 transitions. [2019-09-07 23:08:29,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 23:08:29,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2019-09-07 23:08:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:08:29,066 INFO L225 Difference]: With dead ends: 5046 [2019-09-07 23:08:29,066 INFO L226 Difference]: Without dead ends: 3207 [2019-09-07 23:08:29,078 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 23:08:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2019-09-07 23:08:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3156. [2019-09-07 23:08:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3156 states. [2019-09-07 23:08:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5827 transitions. [2019-09-07 23:08:29,285 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5827 transitions. Word has length 51 [2019-09-07 23:08:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:08:29,287 INFO L475 AbstractCegarLoop]: Abstraction has 3156 states and 5827 transitions. [2019-09-07 23:08:29,288 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 23:08:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5827 transitions. [2019-09-07 23:08:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-07 23:08:29,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:08:29,305 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:08:29,305 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:08:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:08:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash -549491864, now seen corresponding path program 1 times [2019-09-07 23:08:29,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:08:29,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:08:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:29,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:08:29,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:08:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:08:29,660 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:08:29,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-07 23:08:29,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 23:08:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 23:08:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-07 23:08:29,663 INFO L87 Difference]: Start difference. First operand 3156 states and 5827 transitions. Second operand 6 states. [2019-09-07 23:08:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:08:43,336 INFO L93 Difference]: Finished difference Result 9280 states and 17297 transitions. [2019-09-07 23:08:43,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 23:08:43,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-09-07 23:08:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:08:43,384 INFO L225 Difference]: With dead ends: 9280 [2019-09-07 23:08:43,384 INFO L226 Difference]: Without dead ends: 6130 [2019-09-07 23:08:43,396 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-07 23:08:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2019-09-07 23:08:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 6069. [2019-09-07 23:08:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6069 states. [2019-09-07 23:08:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 10871 transitions. [2019-09-07 23:08:43,624 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 10871 transitions. Word has length 122 [2019-09-07 23:08:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:08:43,627 INFO L475 AbstractCegarLoop]: Abstraction has 6069 states and 10871 transitions. [2019-09-07 23:08:43,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 23:08:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 10871 transitions. [2019-09-07 23:08:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-07 23:08:43,637 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:08:43,637 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:08:43,637 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:08:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:08:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash 951952602, now seen corresponding path program 1 times [2019-09-07 23:08:43,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:08:43,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:08:43,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:43,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:08:43,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:08:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:08:43,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:08:43,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 23:08:43,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 23:08:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 23:08:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 23:08:43,859 INFO L87 Difference]: Start difference. First operand 6069 states and 10871 transitions. Second operand 5 states. [2019-09-07 23:08:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:08:59,030 INFO L93 Difference]: Finished difference Result 18453 states and 33722 transitions. [2019-09-07 23:08:59,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 23:08:59,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-09-07 23:08:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:08:59,097 INFO L225 Difference]: With dead ends: 18453 [2019-09-07 23:08:59,097 INFO L226 Difference]: Without dead ends: 12390 [2019-09-07 23:08:59,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 23:08:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12390 states. [2019-09-07 23:08:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12390 to 12116. [2019-09-07 23:08:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12116 states. [2019-09-07 23:08:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12116 states to 12116 states and 18908 transitions. [2019-09-07 23:08:59,485 INFO L78 Accepts]: Start accepts. Automaton has 12116 states and 18908 transitions. Word has length 124 [2019-09-07 23:08:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:08:59,488 INFO L475 AbstractCegarLoop]: Abstraction has 12116 states and 18908 transitions. [2019-09-07 23:08:59,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 23:08:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 12116 states and 18908 transitions. [2019-09-07 23:08:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-07 23:08:59,491 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:08:59,492 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:08:59,492 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:08:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:08:59,493 INFO L82 PathProgramCache]: Analyzing trace with hash -755902026, now seen corresponding path program 1 times [2019-09-07 23:08:59,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:08:59,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:08:59,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:59,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:08:59,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:08:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:08:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:08:59,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:08:59,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 23:08:59,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 23:08:59,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 23:08:59,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 23:08:59,737 INFO L87 Difference]: Start difference. First operand 12116 states and 18908 transitions. Second operand 5 states. [2019-09-07 23:09:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:09:15,121 INFO L93 Difference]: Finished difference Result 37319 states and 60878 transitions. [2019-09-07 23:09:15,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 23:09:15,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2019-09-07 23:09:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:09:15,213 INFO L225 Difference]: With dead ends: 37319 [2019-09-07 23:09:15,214 INFO L226 Difference]: Without dead ends: 25209 [2019-09-07 23:09:15,245 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 23:09:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25209 states. [2019-09-07 23:09:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25209 to 24486. [2019-09-07 23:09:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24486 states. [2019-09-07 23:09:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24486 states to 24486 states and 34946 transitions. [2019-09-07 23:09:15,890 INFO L78 Accepts]: Start accepts. Automaton has 24486 states and 34946 transitions. Word has length 155 [2019-09-07 23:09:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:09:15,891 INFO L475 AbstractCegarLoop]: Abstraction has 24486 states and 34946 transitions. [2019-09-07 23:09:15,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 23:09:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 24486 states and 34946 transitions. [2019-09-07 23:09:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-07 23:09:15,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:09:15,896 INFO L399 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, 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] [2019-09-07 23:09:15,897 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:09:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:09:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash -657325999, now seen corresponding path program 1 times [2019-09-07 23:09:15,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:09:15,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:09:15,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:09:15,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:09:15,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:09:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:09:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 23:09:16,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 23:09:16,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 23:09:16,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 23:09:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:09:16,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 23:09:16,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 23:09:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 23:09:16,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 23:09:16,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-09-07 23:09:16,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 23:09:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 23:09:16,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-07 23:09:16,430 INFO L87 Difference]: Start difference. First operand 24486 states and 34946 transitions. Second operand 9 states. [2019-09-07 23:09:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:09:47,146 INFO L93 Difference]: Finished difference Result 77569 states and 126205 transitions. [2019-09-07 23:09:47,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 23:09:47,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2019-09-07 23:09:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:09:47,434 INFO L225 Difference]: With dead ends: 77569 [2019-09-07 23:09:47,434 INFO L226 Difference]: Without dead ends: 53089 [2019-09-07 23:09:47,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 23:09:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53089 states. [2019-09-07 23:09:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53089 to 51336. [2019-09-07 23:09:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51336 states. [2019-09-07 23:09:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51336 states to 51336 states and 71184 transitions. [2019-09-07 23:09:49,216 INFO L78 Accepts]: Start accepts. Automaton has 51336 states and 71184 transitions. Word has length 202 [2019-09-07 23:09:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:09:49,217 INFO L475 AbstractCegarLoop]: Abstraction has 51336 states and 71184 transitions. [2019-09-07 23:09:49,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 23:09:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 51336 states and 71184 transitions. [2019-09-07 23:09:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-07 23:09:49,222 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:09:49,222 INFO L399 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, 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] [2019-09-07 23:09:49,223 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:09:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:09:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -848418151, now seen corresponding path program 1 times [2019-09-07 23:09:49,223 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:09:49,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:09:49,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:09:49,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:09:49,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:09:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:09:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 88 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 23:09:49,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 23:09:49,402 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 23:09:49,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 23:09:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:09:49,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 23:09:49,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 23:09:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-09-07 23:09:49,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 23:09:49,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-09-07 23:09:49,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 23:09:49,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 23:09:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 23:09:49,567 INFO L87 Difference]: Start difference. First operand 51336 states and 71184 transitions. Second operand 8 states. [2019-09-07 23:10:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:10:15,896 INFO L93 Difference]: Finished difference Result 180721 states and 265816 transitions. [2019-09-07 23:10:15,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 23:10:15,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 214 [2019-09-07 23:10:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:10:16,468 INFO L225 Difference]: With dead ends: 180721 [2019-09-07 23:10:16,469 INFO L226 Difference]: Without dead ends: 129391 [2019-09-07 23:10:16,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-09-07 23:10:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129391 states. [2019-09-07 23:10:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129391 to 121586. [2019-09-07 23:10:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121586 states. [2019-09-07 23:10:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121586 states to 121586 states and 164522 transitions. [2019-09-07 23:10:19,396 INFO L78 Accepts]: Start accepts. Automaton has 121586 states and 164522 transitions. Word has length 214 [2019-09-07 23:10:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:10:19,397 INFO L475 AbstractCegarLoop]: Abstraction has 121586 states and 164522 transitions. [2019-09-07 23:10:19,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 23:10:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121586 states and 164522 transitions. [2019-09-07 23:10:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2019-09-07 23:10:19,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:10:19,409 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:10:19,410 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:10:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:10:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1647384258, now seen corresponding path program 1 times [2019-09-07 23:10:19,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:10:19,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:10:19,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:10:19,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:10:19,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:10:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:10:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-07 23:10:22,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 23:10:22,066 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 23:10:22,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:10:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:10:22,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 23:10:22,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 23:10:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:10:22,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 23:10:22,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-09-07 23:10:22,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 23:10:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 23:10:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 23:10:22,402 INFO L87 Difference]: Start difference. First operand 121586 states and 164522 transitions. Second operand 5 states. [2019-09-07 23:10:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:10:39,372 INFO L93 Difference]: Finished difference Result 330296 states and 456348 transitions. [2019-09-07 23:10:39,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 23:10:39,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 546 [2019-09-07 23:10:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:10:40,109 INFO L225 Difference]: With dead ends: 330296 [2019-09-07 23:10:40,109 INFO L226 Difference]: Without dead ends: 208716 [2019-09-07 23:10:40,267 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 550 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 23:10:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208716 states. [2019-09-07 23:10:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208716 to 194471. [2019-09-07 23:10:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194471 states. [2019-09-07 23:10:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194471 states to 194471 states and 251520 transitions. [2019-09-07 23:10:48,158 INFO L78 Accepts]: Start accepts. Automaton has 194471 states and 251520 transitions. Word has length 546 [2019-09-07 23:10:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:10:48,159 INFO L475 AbstractCegarLoop]: Abstraction has 194471 states and 251520 transitions. [2019-09-07 23:10:48,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 23:10:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 194471 states and 251520 transitions. [2019-09-07 23:10:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2019-09-07 23:10:48,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:10:48,195 INFO L399 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:10:48,196 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:10:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:10:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2118384393, now seen corresponding path program 1 times [2019-09-07 23:10:48,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:10:48,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:10:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:10:48,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:10:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:10:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:10:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-09-07 23:10:49,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:10:49,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 23:10:49,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 23:10:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 23:10:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 23:10:49,038 INFO L87 Difference]: Start difference. First operand 194471 states and 251520 transitions. Second operand 3 states. [2019-09-07 23:11:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:11:02,030 INFO L93 Difference]: Finished difference Result 471707 states and 628726 transitions. [2019-09-07 23:11:02,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 23:11:02,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 851 [2019-09-07 23:11:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:11:02,912 INFO L225 Difference]: With dead ends: 471707 [2019-09-07 23:11:02,912 INFO L226 Difference]: Without dead ends: 277242 [2019-09-07 23:11:03,129 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 23:11:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277242 states. [2019-09-07 23:11:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277242 to 270260. [2019-09-07 23:11:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270260 states. [2019-09-07 23:11:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270260 states to 270260 states and 355762 transitions. [2019-09-07 23:11:12,374 INFO L78 Accepts]: Start accepts. Automaton has 270260 states and 355762 transitions. Word has length 851 [2019-09-07 23:11:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:11:12,375 INFO L475 AbstractCegarLoop]: Abstraction has 270260 states and 355762 transitions. [2019-09-07 23:11:12,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 23:11:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 270260 states and 355762 transitions. [2019-09-07 23:11:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2019-09-07 23:11:12,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:11:12,396 INFO L399 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:11:12,396 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:11:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:11:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1192788328, now seen corresponding path program 1 times [2019-09-07 23:11:12,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:11:12,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:11:12,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:11:12,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:11:12,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:11:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:11:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-09-07 23:11:13,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:11:13,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 23:11:13,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 23:11:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 23:11:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 23:11:13,989 INFO L87 Difference]: Start difference. First operand 270260 states and 355762 transitions. Second operand 4 states. [2019-09-07 23:11:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:11:39,544 INFO L93 Difference]: Finished difference Result 747172 states and 1039028 transitions. [2019-09-07 23:11:39,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 23:11:39,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 927 [2019-09-07 23:11:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:11:41,568 INFO L225 Difference]: With dead ends: 747172 [2019-09-07 23:11:41,569 INFO L226 Difference]: Without dead ends: 476918 [2019-09-07 23:11:41,852 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 23:11:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476918 states. [2019-09-07 23:11:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476918 to 468429. [2019-09-07 23:11:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468429 states. [2019-09-07 23:11:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468429 states to 468429 states and 625703 transitions. [2019-09-07 23:11:55,019 INFO L78 Accepts]: Start accepts. Automaton has 468429 states and 625703 transitions. Word has length 927 [2019-09-07 23:11:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:11:55,021 INFO L475 AbstractCegarLoop]: Abstraction has 468429 states and 625703 transitions. [2019-09-07 23:11:55,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 23:11:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 468429 states and 625703 transitions. [2019-09-07 23:11:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2019-09-07 23:11:55,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:11:55,060 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:11:55,060 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:11:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:11:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 642993323, now seen corresponding path program 1 times [2019-09-07 23:11:55,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:11:55,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:11:55,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:11:55,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:11:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:11:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:12:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 23:12:05,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 23:12:05,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-07 23:12:05,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 23:12:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 23:12:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-07 23:12:05,459 INFO L87 Difference]: Start difference. First operand 468429 states and 625703 transitions. Second operand 7 states. [2019-09-07 23:12:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:12:26,325 INFO L93 Difference]: Finished difference Result 955471 states and 1280819 transitions. [2019-09-07 23:12:26,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 23:12:26,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1010 [2019-09-07 23:12:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:12:27,872 INFO L225 Difference]: With dead ends: 955471 [2019-09-07 23:12:27,873 INFO L226 Difference]: Without dead ends: 487048 [2019-09-07 23:12:29,120 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-07 23:12:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487048 states. [2019-09-07 23:12:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487048 to 486585. [2019-09-07 23:12:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486585 states. [2019-09-07 23:12:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486585 states to 486585 states and 648149 transitions. [2019-09-07 23:12:45,829 INFO L78 Accepts]: Start accepts. Automaton has 486585 states and 648149 transitions. Word has length 1010 [2019-09-07 23:12:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:12:45,830 INFO L475 AbstractCegarLoop]: Abstraction has 486585 states and 648149 transitions. [2019-09-07 23:12:45,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 23:12:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 486585 states and 648149 transitions. [2019-09-07 23:12:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1811 [2019-09-07 23:12:46,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:12:46,049 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:12:46,049 INFO L418 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:12:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:12:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1959905034, now seen corresponding path program 1 times [2019-09-07 23:12:46,050 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:12:46,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:12:46,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:12:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:12:46,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:12:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:12:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 1057 proven. 98 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-09-07 23:12:59,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 23:12:59,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 23:12:59,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:13:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:13:00,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 2212 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 23:13:00,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 23:13:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 1108 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 23:13:01,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 23:13:01,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-09-07 23:13:01,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 23:13:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 23:13:01,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-09-07 23:13:01,487 INFO L87 Difference]: Start difference. First operand 486585 states and 648149 transitions. Second operand 20 states. [2019-09-07 23:13:26,781 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2019-09-07 23:14:08,833 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2019-09-07 23:15:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 23:15:22,605 INFO L93 Difference]: Finished difference Result 1598173 states and 2268769 transitions. [2019-09-07 23:15:22,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 370 states. [2019-09-07 23:15:22,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1810 [2019-09-07 23:15:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 23:15:28,217 INFO L225 Difference]: With dead ends: 1598173 [2019-09-07 23:15:28,217 INFO L226 Difference]: Without dead ends: 1111594 [2019-09-07 23:15:30,466 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2500 GetRequests, 2121 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68767 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=12804, Invalid=131976, Unknown=0, NotChecked=0, Total=144780 [2019-09-07 23:15:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111594 states. [2019-09-07 23:16:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111594 to 1095028. [2019-09-07 23:16:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095028 states. [2019-09-07 23:16:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095028 states to 1095028 states and 1448146 transitions. [2019-09-07 23:16:32,178 INFO L78 Accepts]: Start accepts. Automaton has 1095028 states and 1448146 transitions. Word has length 1810 [2019-09-07 23:16:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 23:16:32,179 INFO L475 AbstractCegarLoop]: Abstraction has 1095028 states and 1448146 transitions. [2019-09-07 23:16:32,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 23:16:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1095028 states and 1448146 transitions. [2019-09-07 23:16:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2082 [2019-09-07 23:16:32,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 23:16:32,445 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 23:16:32,445 INFO L418 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 23:16:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 23:16:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1022545270, now seen corresponding path program 1 times [2019-09-07 23:16:32,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 23:16:32,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 23:16:32,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:16:32,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:16:32,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 23:16:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:16:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 803 proven. 793 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2019-09-07 23:16:48,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 23:16:48,636 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 23:16:48,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 23:16:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 23:16:49,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 23:16:49,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 23:16:49,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-07 23:16:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 2011 proven. 6 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 23:16:51,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 23:16:51,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-09-07 23:16:51,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 23:16:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 23:16:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2019-09-07 23:16:51,742 INFO L87 Difference]: Start difference. First operand 1095028 states and 1448146 transitions. Second operand 21 states. [2019-09-07 23:19:09,566 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52