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/Problem17_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 21:45:32,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 21:45:32,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 21:45:32,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 21:45:32,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 21:45:32,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 21:45:32,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 21:45:32,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 21:45:32,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 21:45:32,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 21:45:32,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 21:45:32,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 21:45:32,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 21:45:32,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 21:45:32,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 21:45:32,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 21:45:32,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 21:45:32,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 21:45:32,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 21:45:32,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 21:45:32,550 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 21:45:32,576 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 21:45:32,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 21:45:32,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 21:45:32,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 21:45:32,578 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 21:45:32,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 21:45:32,579 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 21:45:32,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 21:45:32,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 21:45:32,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 21:45:32,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 21:45:32,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 21:45:32,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 21:45:32,580 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 21:45:32,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 21:45:32,581 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 21:45:32,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 21:45:32,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 21:45:32,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 21:45:32,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 21:45:32,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 21:45:32,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 21:45:32,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 21:45:32,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 21:45:32,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 21:45:32,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 21:45:32,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 21:45:32,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 21:45:32,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 21:45:32,611 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 21:45:32,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 21:45:32,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 21:45:32,629 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 21:45:32,629 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 21:45:32,629 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label26.c [2019-09-07 21:45:32,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113318825/66e87b6b813f4ba1a6aa6d52a3ade5df/FLAG1dd9f9ff8 [2019-09-07 21:45:33,516 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 21:45:33,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label26.c [2019-09-07 21:45:33,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113318825/66e87b6b813f4ba1a6aa6d52a3ade5df/FLAG1dd9f9ff8 [2019-09-07 21:45:34,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113318825/66e87b6b813f4ba1a6aa6d52a3ade5df [2019-09-07 21:45:34,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 21:45:34,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 21:45:34,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 21:45:34,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 21:45:34,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 21:45:34,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:45:34" (1/1) ... [2019-09-07 21:45:34,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e3ab4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:34, skipping insertion in model container [2019-09-07 21:45:34,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:45:34" (1/1) ... [2019-09-07 21:45:34,092 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 21:45:34,213 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 21:45:35,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 21:45:35,427 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 21:45:35,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 21:45:35,898 INFO L192 MainTranslator]: Completed translation [2019-09-07 21:45:35,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35 WrapperNode [2019-09-07 21:45:35,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 21:45:35,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 21:45:35,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 21:45:35,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 21:45:35,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:35,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:35,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:35,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:36,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:36,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:36,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... [2019-09-07 21:45:36,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 21:45:36,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 21:45:36,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 21:45:36,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 21:45:36,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 21:45:36,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 21:45:36,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 21:45:36,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-07 21:45:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-07 21:45:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 21:45:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-07 21:45:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-07 21:45:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 21:45:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 21:45:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-07 21:45:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 21:45:36,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 21:45:36,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 21:45:40,687 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 21:45:40,688 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-07 21:45:40,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:45:40 BoogieIcfgContainer [2019-09-07 21:45:40,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 21:45:40,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 21:45:40,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 21:45:40,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 21:45:40,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:45:34" (1/3) ... [2019-09-07 21:45:40,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f36755e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:45:40, skipping insertion in model container [2019-09-07 21:45:40,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:45:35" (2/3) ... [2019-09-07 21:45:40,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f36755e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:45:40, skipping insertion in model container [2019-09-07 21:45:40,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:45:40" (3/3) ... [2019-09-07 21:45:40,712 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label26.c [2019-09-07 21:45:40,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 21:45:40,745 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 21:45:40,772 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 21:45:40,842 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 21:45:40,844 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 21:45:40,844 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 21:45:40,844 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 21:45:40,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 21:45:40,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 21:45:40,845 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 21:45:40,845 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 21:45:40,845 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 21:45:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-07 21:45:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 21:45:40,912 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:45:40,913 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] [2019-09-07 21:45:40,916 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:45:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:45:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash 323584841, now seen corresponding path program 1 times [2019-09-07 21:45:40,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:45:40,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:45:40,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:40,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:45:40,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:45:41,308 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 21:45:41,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 21:45:41,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 21:45:41,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 21:45:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 21:45:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 21:45:41,333 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-07 21:45:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:45:48,207 INFO L93 Difference]: Finished difference Result 2158 states and 4003 transitions. [2019-09-07 21:45:48,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 21:45:48,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 21:45:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:45:48,240 INFO L225 Difference]: With dead ends: 2158 [2019-09-07 21:45:48,240 INFO L226 Difference]: Without dead ends: 1474 [2019-09-07 21:45:48,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 21:45:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2019-09-07 21:45:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1447. [2019-09-07 21:45:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1447 states. [2019-09-07 21:45:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2481 transitions. [2019-09-07 21:45:48,407 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2481 transitions. Word has length 34 [2019-09-07 21:45:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:45:48,408 INFO L475 AbstractCegarLoop]: Abstraction has 1447 states and 2481 transitions. [2019-09-07 21:45:48,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 21:45:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2481 transitions. [2019-09-07 21:45:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 21:45:48,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:45:48,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:45:48,415 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:45:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:45:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -371810984, now seen corresponding path program 1 times [2019-09-07 21:45:48,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:45:48,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:45:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:48,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:45:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:45:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 21:45:48,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 21:45:48,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-07 21:45:48,618 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 21:45:48,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 21:45:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-07 21:45:48,619 INFO L87 Difference]: Start difference. First operand 1447 states and 2481 transitions. Second operand 6 states. [2019-09-07 21:45:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:45:57,667 INFO L93 Difference]: Finished difference Result 5602 states and 9930 transitions. [2019-09-07 21:45:57,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 21:45:57,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-09-07 21:45:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:45:57,703 INFO L225 Difference]: With dead ends: 5602 [2019-09-07 21:45:57,703 INFO L226 Difference]: Without dead ends: 4161 [2019-09-07 21:45:57,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 21:45:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2019-09-07 21:45:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 4140. [2019-09-07 21:45:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4140 states. [2019-09-07 21:45:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6053 transitions. [2019-09-07 21:45:57,877 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6053 transitions. Word has length 112 [2019-09-07 21:45:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:45:57,879 INFO L475 AbstractCegarLoop]: Abstraction has 4140 states and 6053 transitions. [2019-09-07 21:45:57,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 21:45:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6053 transitions. [2019-09-07 21:45:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 21:45:57,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:45:57,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:45:57,889 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:45:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:45:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -914176444, now seen corresponding path program 1 times [2019-09-07 21:45:57,890 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:45:57,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:45:57,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:57,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:45:57,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:45:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:45:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 21:45:58,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 21:45:58,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-07 21:45:58,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 21:45:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 21:45:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-07 21:45:58,076 INFO L87 Difference]: Start difference. First operand 4140 states and 6053 transitions. Second operand 6 states. [2019-09-07 21:46:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:46:03,217 INFO L93 Difference]: Finished difference Result 12482 states and 19726 transitions. [2019-09-07 21:46:03,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 21:46:03,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-09-07 21:46:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:46:03,273 INFO L225 Difference]: With dead ends: 12482 [2019-09-07 21:46:03,273 INFO L226 Difference]: Without dead ends: 8348 [2019-09-07 21:46:03,290 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-07 21:46:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8348 states. [2019-09-07 21:46:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8348 to 8275. [2019-09-07 21:46:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8275 states. [2019-09-07 21:46:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 12051 transitions. [2019-09-07 21:46:03,576 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 12051 transitions. Word has length 113 [2019-09-07 21:46:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:46:03,585 INFO L475 AbstractCegarLoop]: Abstraction has 8275 states and 12051 transitions. [2019-09-07 21:46:03,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 21:46:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 12051 transitions. [2019-09-07 21:46:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 21:46:03,589 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:46:03,589 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-07 21:46:03,589 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:46:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:46:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash -10649297, now seen corresponding path program 1 times [2019-09-07 21:46:03,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:46:03,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:46:03,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:03,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:46:03,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-07 21:46:03,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:46:03,869 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:46:03,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:46:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:03,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 21:46:03,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:46:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 21:46:04,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:46:04,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-09-07 21:46:04,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 21:46:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 21:46:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-07 21:46:04,113 INFO L87 Difference]: Start difference. First operand 8275 states and 12051 transitions. Second operand 9 states. [2019-09-07 21:46:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:46:10,707 INFO L93 Difference]: Finished difference Result 20630 states and 30023 transitions. [2019-09-07 21:46:10,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 21:46:10,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2019-09-07 21:46:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:46:10,778 INFO L225 Difference]: With dead ends: 20630 [2019-09-07 21:46:10,779 INFO L226 Difference]: Without dead ends: 11062 [2019-09-07 21:46:10,809 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 21:46:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2019-09-07 21:46:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9699. [2019-09-07 21:46:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9699 states. [2019-09-07 21:46:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 12440 transitions. [2019-09-07 21:46:11,094 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 12440 transitions. Word has length 186 [2019-09-07 21:46:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:46:11,095 INFO L475 AbstractCegarLoop]: Abstraction has 9699 states and 12440 transitions. [2019-09-07 21:46:11,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 21:46:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 12440 transitions. [2019-09-07 21:46:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-09-07 21:46:11,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:46:11,099 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:46:11,099 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:46:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:46:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2079444093, now seen corresponding path program 1 times [2019-09-07 21:46:11,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:46:11,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:46:11,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:11,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:46:11,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 21:46:11,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:46:11,422 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 21:46:11,436 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 21:46:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:11,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 21:46:11,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:46:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 21:46:11,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 21:46:11,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-09-07 21:46:11,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 21:46:11,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 21:46:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-07 21:46:11,622 INFO L87 Difference]: Start difference. First operand 9699 states and 12440 transitions. Second operand 8 states. [2019-09-07 21:46:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:46:17,446 INFO L93 Difference]: Finished difference Result 19463 states and 25362 transitions. [2019-09-07 21:46:17,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 21:46:17,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 199 [2019-09-07 21:46:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:46:17,489 INFO L225 Difference]: With dead ends: 19463 [2019-09-07 21:46:17,489 INFO L226 Difference]: Without dead ends: 9770 [2019-09-07 21:46:17,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-09-07 21:46:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9770 states. [2019-09-07 21:46:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9770 to 9699. [2019-09-07 21:46:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9699 states. [2019-09-07 21:46:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 12278 transitions. [2019-09-07 21:46:17,843 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 12278 transitions. Word has length 199 [2019-09-07 21:46:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:46:17,844 INFO L475 AbstractCegarLoop]: Abstraction has 9699 states and 12278 transitions. [2019-09-07 21:46:17,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 21:46:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 12278 transitions. [2019-09-07 21:46:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-09-07 21:46:17,850 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:46:17,851 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 21:46:17,851 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:46:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:46:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash -47814250, now seen corresponding path program 1 times [2019-09-07 21:46:17,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:46:17,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:46:17,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:17,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:46:17,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-07 21:46:18,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:46:18,118 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) [2019-09-07 21:46:18,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:46:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:18,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 21:46:18,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:46:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 21:46:18,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:46:18,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-09-07 21:46:18,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 21:46:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 21:46:18,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-07 21:46:18,332 INFO L87 Difference]: Start difference. First operand 9699 states and 12278 transitions. Second operand 7 states. [2019-09-07 21:46:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:46:27,010 INFO L93 Difference]: Finished difference Result 25567 states and 33613 transitions. [2019-09-07 21:46:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 21:46:27,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 275 [2019-09-07 21:46:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:46:27,066 INFO L225 Difference]: With dead ends: 25567 [2019-09-07 21:46:27,066 INFO L226 Difference]: Without dead ends: 15874 [2019-09-07 21:46:27,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-09-07 21:46:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2019-09-07 21:46:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 14436. [2019-09-07 21:46:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14436 states. [2019-09-07 21:46:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14436 states to 14436 states and 18222 transitions. [2019-09-07 21:46:27,422 INFO L78 Accepts]: Start accepts. Automaton has 14436 states and 18222 transitions. Word has length 275 [2019-09-07 21:46:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:46:27,425 INFO L475 AbstractCegarLoop]: Abstraction has 14436 states and 18222 transitions. [2019-09-07 21:46:27,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 21:46:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 14436 states and 18222 transitions. [2019-09-07 21:46:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2019-09-07 21:46:27,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:46:27,433 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:27,433 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:46:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:46:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -911371161, now seen corresponding path program 1 times [2019-09-07 21:46:27,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:46:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:46:27,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:27,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:46:27,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:46:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 89 proven. 146 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-09-07 21:46:27,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:46:27,830 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) [2019-09-07 21:46:27,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:46:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:46:27,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 21:46:27,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:46:27,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:46:27,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:46:30,047 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2019-09-07 21:46:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-09-07 21:46:30,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:46:30,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-09-07 21:46:30,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 21:46:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 21:46:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-07 21:46:30,153 INFO L87 Difference]: Start difference. First operand 14436 states and 18222 transitions. Second operand 10 states. [2019-09-07 21:47:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:47:44,392 INFO L93 Difference]: Finished difference Result 43571 states and 62541 transitions. [2019-09-07 21:47:44,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 21:47:44,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 321 [2019-09-07 21:47:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:47:44,500 INFO L225 Difference]: With dead ends: 43571 [2019-09-07 21:47:44,500 INFO L226 Difference]: Without dead ends: 28153 [2019-09-07 21:47:44,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2019-09-07 21:47:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28153 states. [2019-09-07 21:47:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28153 to 26489. [2019-09-07 21:47:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26489 states. [2019-09-07 21:47:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26489 states to 26489 states and 34232 transitions. [2019-09-07 21:47:45,184 INFO L78 Accepts]: Start accepts. Automaton has 26489 states and 34232 transitions. Word has length 321 [2019-09-07 21:47:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:47:45,185 INFO L475 AbstractCegarLoop]: Abstraction has 26489 states and 34232 transitions. [2019-09-07 21:47:45,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 21:47:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26489 states and 34232 transitions. [2019-09-07 21:47:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-09-07 21:47:45,195 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:47:45,195 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 21:47:45,196 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:47:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:47:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash 912628005, now seen corresponding path program 1 times [2019-09-07 21:47:45,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:47:45,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:47:45,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:47:45,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:47:45,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:47:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:47:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 170 proven. 109 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-09-07 21:47:45,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:47:45,787 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) [2019-09-07 21:47:45,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:47:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:47:45,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 21:47:45,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:47:45,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:47:45,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:47:50,049 WARN L188 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2019-09-07 21:47:50,905 WARN L188 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-09-07 21:47:50,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-07 21:47:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-07 21:47:51,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:47:51,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-07 21:47:51,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 21:47:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 21:47:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-09-07 21:47:51,114 INFO L87 Difference]: Start difference. First operand 26489 states and 34232 transitions. Second operand 14 states. [2019-09-07 21:48:46,260 WARN L188 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2019-09-07 21:51:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:51:48,579 INFO L93 Difference]: Finished difference Result 73474 states and 101806 transitions. [2019-09-07 21:51:48,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-09-07 21:51:48,579 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 358 [2019-09-07 21:51:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:51:48,775 INFO L225 Difference]: With dead ends: 73474 [2019-09-07 21:51:48,775 INFO L226 Difference]: Without dead ends: 46991 [2019-09-07 21:51:48,834 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5024 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1837, Invalid=11045, Unknown=0, NotChecked=0, Total=12882 [2019-09-07 21:51:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46991 states. [2019-09-07 21:51:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46991 to 44287. [2019-09-07 21:51:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44287 states. [2019-09-07 21:51:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44287 states to 44287 states and 57018 transitions. [2019-09-07 21:51:49,973 INFO L78 Accepts]: Start accepts. Automaton has 44287 states and 57018 transitions. Word has length 358 [2019-09-07 21:51:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:51:49,973 INFO L475 AbstractCegarLoop]: Abstraction has 44287 states and 57018 transitions. [2019-09-07 21:51:49,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 21:51:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 44287 states and 57018 transitions. [2019-09-07 21:51:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-09-07 21:51:49,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:51:49,993 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, 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, 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 21:51:49,993 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:51:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:51:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1250060244, now seen corresponding path program 1 times [2019-09-07 21:51:49,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:51:49,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:51:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:51:49,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:51:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:51:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:51:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 387 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-09-07 21:51:50,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:51:50,355 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:51:50,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:51:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:51:50,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 21:51:50,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:51:50,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:51:50,826 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 21 [2019-09-07 21:51:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 529 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Stream closed [2019-09-07 21:51:51,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:51:51,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 21:51:51,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 21:51:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 21:51:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-07 21:51:51,021 INFO L87 Difference]: Start difference. First operand 44287 states and 57018 transitions. Second operand 8 states. [2019-09-07 21:52:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 21:52:15,531 INFO L93 Difference]: Finished difference Result 108990 states and 144542 transitions. [2019-09-07 21:52:15,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 21:52:15,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 437 [2019-09-07 21:52:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 21:52:15,717 INFO L225 Difference]: With dead ends: 108990 [2019-09-07 21:52:15,717 INFO L226 Difference]: Without dead ends: 61814 [2019-09-07 21:52:15,791 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 21:52:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61814 states. [2019-09-07 21:52:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61814 to 58257. [2019-09-07 21:52:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58257 states. [2019-09-07 21:52:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58257 states to 58257 states and 72244 transitions. [2019-09-07 21:52:18,602 INFO L78 Accepts]: Start accepts. Automaton has 58257 states and 72244 transitions. Word has length 437 [2019-09-07 21:52:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 21:52:18,603 INFO L475 AbstractCegarLoop]: Abstraction has 58257 states and 72244 transitions. [2019-09-07 21:52:18,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 21:52:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 58257 states and 72244 transitions. [2019-09-07 21:52:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2019-09-07 21:52:18,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 21:52:18,623 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, 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, 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] [2019-09-07 21:52:18,623 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 21:52:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 21:52:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1841135000, now seen corresponding path program 1 times [2019-09-07 21:52:18,624 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 21:52:18,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 21:52:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:52:18,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:52:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 21:52:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:52:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 290 proven. 76 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-09-07 21:52:19,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 21:52:19,034 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 21:52:19,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 21:52:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 21:52:19,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 21:52:19,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 21:52:19,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:19,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 21:52:35,496 WARN L188 SmtUtils]: Spent 14.22 s on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2019-09-07 21:52:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 482 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-09-07 21:52:35,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 21:52:35,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-07 21:52:35,683 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 21:52:35,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 21:52:35,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-07 21:52:35,684 INFO L87 Difference]: Start difference. First operand 58257 states and 72244 transitions. Second operand 8 states. [2019-09-07 21:52:39,782 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 27