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/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:06:34,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:06:34,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:06:34,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 10:06:34,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:06:34,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:06:34,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:06:34,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:06:34,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:06:34,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:06:34,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:06:34,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:06:34,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:06:34,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:06:34,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:06:34,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:06:34,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:06:34,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:06:34,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:06:34,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:06:34,517 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 10:06:34,546 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:06:34,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:06:34,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:06:34,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:06:34,550 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:06:34,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:06:34,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:06:34,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:06:34,552 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:06:34,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:06:34,552 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:06:34,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:06:34,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:06:34,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:06:34,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:06:34,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:06:34,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:06:34,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:06:34,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:06:34,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:06:34,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:06:34,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:06:34,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:06:34,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:06:34,594 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:06:34,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:06:34,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:06:34,615 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:06:34,615 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:06:34,616 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-09-07 10:06:34,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b2e9ec9/6efd1a5365294898ac6bea9427f22908/FLAG269a5275f [2019-09-07 10:06:35,109 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:06:35,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-09-07 10:06:35,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b2e9ec9/6efd1a5365294898ac6bea9427f22908/FLAG269a5275f [2019-09-07 10:06:35,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b2e9ec9/6efd1a5365294898ac6bea9427f22908 [2019-09-07 10:06:35,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:06:35,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:06:35,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:06:35,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:06:35,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:06:35,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18829924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35, skipping insertion in model container [2019-09-07 10:06:35,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,517 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:06:35,533 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:06:35,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:06:35,704 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:06:35,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:06:35,830 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:06:35,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35 WrapperNode [2019-09-07 10:06:35,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:06:35,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:06:35,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:06:35,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:06:35,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (1/1) ... [2019-09-07 10:06:35,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:06:35,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:06:35,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:06:35,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:06:35,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (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 10:06:35,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:06:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:06:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:06:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:06:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:06:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:06:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:06:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:06:36,210 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:06:36,210 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-09-07 10:06:36,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:06:36 BoogieIcfgContainer [2019-09-07 10:06:36,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:06:36,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:06:36,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:06:36,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:06:36,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:06:35" (1/3) ... [2019-09-07 10:06:36,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c834b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:06:36, skipping insertion in model container [2019-09-07 10:06:36,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:35" (2/3) ... [2019-09-07 10:06:36,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c834b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:06:36, skipping insertion in model container [2019-09-07 10:06:36,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:06:36" (3/3) ... [2019-09-07 10:06:36,228 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2019-09-07 10:06:36,237 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:06:36,246 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:06:36,263 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:06:36,293 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:06:36,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:06:36,294 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:06:36,294 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:06:36,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:06:36,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:06:36,295 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:06:36,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:06:36,295 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:06:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-09-07 10:06:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 10:06:36,319 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:36,320 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] [2019-09-07 10:06:36,322 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -190793262, now seen corresponding path program 1 times [2019-09-07 10:06:36,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:36,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:36,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:36,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:36,460 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 10:06:36,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:06:36,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:06:36,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:06:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:06:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:06:36,481 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-09-07 10:06:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:36,520 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2019-09-07 10:06:36,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:06:36,522 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2019-09-07 10:06:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:36,533 INFO L225 Difference]: With dead ends: 63 [2019-09-07 10:06:36,534 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 10:06:36,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:06:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 10:06:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-07 10:06:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 10:06:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-07 10:06:36,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 25 [2019-09-07 10:06:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:36,601 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-07 10:06:36,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:06:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-07 10:06:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 10:06:36,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:36,605 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] [2019-09-07 10:06:36,606 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1826977482, now seen corresponding path program 1 times [2019-09-07 10:06:36,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:36,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:36,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:36,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:36,727 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 10:06:36,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:06:36,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:06:36,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:06:36,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:06:36,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:06:36,732 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-09-07 10:06:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:36,869 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2019-09-07 10:06:36,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:06:36,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-09-07 10:06:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:36,871 INFO L225 Difference]: With dead ends: 60 [2019-09-07 10:06:36,871 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 10:06:36,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 10:06:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 10:06:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-07 10:06:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 10:06:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-09-07 10:06:36,882 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-09-07 10:06:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:36,882 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-09-07 10:06:36,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:06:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-09-07 10:06:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 10:06:36,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:36,884 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] [2019-09-07 10:06:36,885 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1635964633, now seen corresponding path program 1 times [2019-09-07 10:06:36,885 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:36,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:36,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:36,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 10:06:36,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:36,960 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 10:06:36,982 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 10:06:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:37,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:06:37,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 10:06:37,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:37,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:06:37,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:06:37,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:06:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:06:37,097 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2019-09-07 10:06:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:37,234 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-09-07 10:06:37,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:06:37,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-09-07 10:06:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:37,236 INFO L225 Difference]: With dead ends: 73 [2019-09-07 10:06:37,236 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 10:06:37,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:06:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 10:06:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-07 10:06:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 10:06:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-09-07 10:06:37,245 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2019-09-07 10:06:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:37,245 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-09-07 10:06:37,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:06:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-09-07 10:06:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 10:06:37,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:37,247 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-07 10:06:37,248 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:37,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1768739882, now seen corresponding path program 2 times [2019-09-07 10:06:37,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:37,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:37,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:37,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:37,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 10:06:37,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:37,374 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 10:06:37,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:37,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:06:37,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:37,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:06:37,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Stream closed [2019-09-07 10:06:37,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:37,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:06:37,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:06:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:06:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:06:37,461 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2019-09-07 10:06:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:37,607 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-09-07 10:06:37,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:06:37,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-09-07 10:06:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:37,611 INFO L225 Difference]: With dead ends: 86 [2019-09-07 10:06:37,611 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 10:06:37,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:06:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 10:06:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-07 10:06:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 10:06:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-09-07 10:06:37,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2019-09-07 10:06:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:37,628 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-09-07 10:06:37,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:06:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-09-07 10:06:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 10:06:37,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:37,632 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 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 10:06:37,632 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1394041657, now seen corresponding path program 3 times [2019-09-07 10:06:37,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:37,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:37,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:37,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:37,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 10:06:37,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:37,777 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 10:06:37,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:06:37,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 10:06:37,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:37,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:06:37,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 10:06:37,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:37,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:06:37,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:06:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:06:37,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:06:37,906 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2019-09-07 10:06:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:38,034 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-09-07 10:06:38,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:06:38,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-09-07 10:06:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:38,037 INFO L225 Difference]: With dead ends: 99 [2019-09-07 10:06:38,037 INFO L226 Difference]: Without dead ends: 58 [2019-09-07 10:06:38,038 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:06:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-07 10:06:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-07 10:06:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 10:06:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-09-07 10:06:38,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 46 [2019-09-07 10:06:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:38,057 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-09-07 10:06:38,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:06:38,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-09-07 10:06:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 10:06:38,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:38,059 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 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 10:06:38,059 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:38,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1002468982, now seen corresponding path program 4 times [2019-09-07 10:06:38,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:38,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:38,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:38,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:38,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-07 10:06:38,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:38,169 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 10:06:38,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:38,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:06:38,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:38,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:06:38,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:06:38,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:38,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:06:38,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:06:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:06:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:06:38,258 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2019-09-07 10:06:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:38,396 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-09-07 10:06:38,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:06:38,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-09-07 10:06:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:38,398 INFO L225 Difference]: With dead ends: 112 [2019-09-07 10:06:38,398 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 10:06:38,399 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:06:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 10:06:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-07 10:06:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-07 10:06:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2019-09-07 10:06:38,407 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2019-09-07 10:06:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:38,408 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2019-09-07 10:06:38,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:06:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2019-09-07 10:06:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 10:06:38,410 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:38,410 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 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 10:06:38,412 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash 451754087, now seen corresponding path program 5 times [2019-09-07 10:06:38,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:38,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:38,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-07 10:06:38,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:38,572 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 10:06:38,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:06:42,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-07 10:06:42,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:42,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:06:42,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-07 10:06:42,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:42,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:06:42,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:06:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:06:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:06:42,346 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2019-09-07 10:06:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:42,482 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2019-09-07 10:06:42,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:06:42,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-09-07 10:06:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:42,484 INFO L225 Difference]: With dead ends: 125 [2019-09-07 10:06:42,484 INFO L226 Difference]: Without dead ends: 72 [2019-09-07 10:06:42,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:06:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-07 10:06:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-07 10:06:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 10:06:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-09-07 10:06:42,493 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 60 [2019-09-07 10:06:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:42,493 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-09-07 10:06:42,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:06:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-09-07 10:06:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 10:06:42,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:42,495 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 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 10:06:42,495 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash 757831402, now seen corresponding path program 6 times [2019-09-07 10:06:42,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:42,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:42,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-07 10:06:42,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:42,580 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) [2019-09-07 10:06:42,598 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:43,544 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-07 10:06:43,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:43,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:06:43,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-07 10:06:43,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:43,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:06:43,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:06:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:06:43,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:06:43,582 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 10 states. [2019-09-07 10:06:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:43,696 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-09-07 10:06:43,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:06:43,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-09-07 10:06:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:43,698 INFO L225 Difference]: With dead ends: 138 [2019-09-07 10:06:43,698 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 10:06:43,699 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:06:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 10:06:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-07 10:06:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 10:06:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2019-09-07 10:06:43,707 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 67 [2019-09-07 10:06:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:43,708 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2019-09-07 10:06:43,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:06:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2019-09-07 10:06:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-07 10:06:43,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:43,710 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 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 10:06:43,710 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1686307833, now seen corresponding path program 7 times [2019-09-07 10:06:43,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:43,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:43,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:43,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:43,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-09-07 10:06:43,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:43,828 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) [2019-09-07 10:06:43,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:43,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:06:43,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-09-07 10:06:43,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:43,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:06:43,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:06:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:06:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:06:43,947 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 11 states. [2019-09-07 10:06:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:44,087 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2019-09-07 10:06:44,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:06:44,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2019-09-07 10:06:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:44,089 INFO L225 Difference]: With dead ends: 151 [2019-09-07 10:06:44,089 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 10:06:44,094 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:06:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 10:06:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-07 10:06:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 10:06:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-09-07 10:06:44,116 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 74 [2019-09-07 10:06:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:44,116 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-09-07 10:06:44,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:06:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-09-07 10:06:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 10:06:44,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:44,118 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 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 10:06:44,118 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 494861386, now seen corresponding path program 8 times [2019-09-07 10:06:44,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:44,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:44,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:44,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:44,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-09-07 10:06:44,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:44,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:06:44,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:44,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:06:44,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:44,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:06:44,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-09-07 10:06:44,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:44,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:06:44,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:06:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:06:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:06:44,364 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2019-09-07 10:06:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:44,512 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2019-09-07 10:06:44,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:06:44,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2019-09-07 10:06:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:44,513 INFO L225 Difference]: With dead ends: 164 [2019-09-07 10:06:44,513 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 10:06:44,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:06:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 10:06:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-07 10:06:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 10:06:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2019-09-07 10:06:44,531 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 81 [2019-09-07 10:06:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:44,532 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2019-09-07 10:06:44,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:06:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2019-09-07 10:06:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 10:06:44,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:44,535 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 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 10:06:44,537 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -938874969, now seen corresponding path program 9 times [2019-09-07 10:06:44,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:44,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:44,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:44,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:44,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-09-07 10:06:44,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:44,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:06:44,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:01,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 10:07:01,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:01,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 10:07:01,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-09-07 10:07:01,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:01,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-09-07 10:07:01,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:07:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:07:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:07:01,148 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 14 states. [2019-09-07 10:07:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:01,328 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2019-09-07 10:07:01,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:07:01,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2019-09-07 10:07:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:01,329 INFO L225 Difference]: With dead ends: 177 [2019-09-07 10:07:01,329 INFO L226 Difference]: Without dead ends: 100 [2019-09-07 10:07:01,330 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:07:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-07 10:07:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-07 10:07:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 10:07:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2019-09-07 10:07:01,348 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 88 [2019-09-07 10:07:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:01,349 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2019-09-07 10:07:01,349 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:07:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2019-09-07 10:07:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 10:07:01,350 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:01,350 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 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 10:07:01,350 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1207453270, now seen corresponding path program 10 times [2019-09-07 10:07:01,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:01,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:01,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:01,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 10:07:01,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:01,520 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:01,549 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:07:01,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:07:01,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:01,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:07:01,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 10:07:01,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:01,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:07:01,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:07:01,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:07:01,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:07:01,648 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2019-09-07 10:07:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:01,798 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2019-09-07 10:07:01,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:07:01,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2019-09-07 10:07:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:01,800 INFO L225 Difference]: With dead ends: 190 [2019-09-07 10:07:01,800 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 10:07:01,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:07:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 10:07:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-07 10:07:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 10:07:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2019-09-07 10:07:01,808 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 95 [2019-09-07 10:07:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:01,808 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2019-09-07 10:07:01,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:07:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2019-09-07 10:07:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 10:07:01,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:01,810 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 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 10:07:01,810 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1082522439, now seen corresponding path program 11 times [2019-09-07 10:07:01,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:01,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:01,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:01,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:01,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-07 10:07:01,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:01,956 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:07:01,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:51,194 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 10:07:51,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:51,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:07:51,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-07 10:07:51,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:51,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:07:51,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:07:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:07:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:07:51,284 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 15 states. [2019-09-07 10:07:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:51,458 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2019-09-07 10:07:51,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:07:51,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2019-09-07 10:07:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:51,459 INFO L225 Difference]: With dead ends: 203 [2019-09-07 10:07:51,460 INFO L226 Difference]: Without dead ends: 114 [2019-09-07 10:07:51,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:07:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-07 10:07:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-09-07 10:07:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 10:07:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2019-09-07 10:07:51,468 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 102 [2019-09-07 10:07:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:51,469 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2019-09-07 10:07:51,469 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:07:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2019-09-07 10:07:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-07 10:07:51,470 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:51,470 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 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 10:07:51,470 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1458319606, now seen corresponding path program 12 times [2019-09-07 10:07:51,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:51,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:51,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2019-09-07 10:07:51,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:51,651 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:51,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:08:28,689 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:08:28,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:08:28,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:08:28,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2019-09-07 10:08:28,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:28,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:08:28,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:08:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:08:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:08:28,782 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 16 states. [2019-09-07 10:08:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:28,970 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2019-09-07 10:08:28,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:08:28,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2019-09-07 10:08:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:28,972 INFO L225 Difference]: With dead ends: 216 [2019-09-07 10:08:28,972 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 10:08:28,973 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:08:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 10:08:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-09-07 10:08:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 10:08:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2019-09-07 10:08:28,980 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 109 [2019-09-07 10:08:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:28,981 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2019-09-07 10:08:28,981 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:08:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2019-09-07 10:08:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 10:08:28,982 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:28,982 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 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 10:08:28,983 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash -882690329, now seen corresponding path program 13 times [2019-09-07 10:08:28,983 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:28,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:28,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:08:28,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-09-07 10:08:29,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:29,185 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:08:29,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:08:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:29,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:08:29,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-09-07 10:08:29,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:29,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:08:29,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:08:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:08:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:08:29,329 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 17 states. [2019-09-07 10:08:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:29,570 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2019-09-07 10:08:29,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:08:29,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2019-09-07 10:08:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:29,572 INFO L225 Difference]: With dead ends: 229 [2019-09-07 10:08:29,572 INFO L226 Difference]: Without dead ends: 128 [2019-09-07 10:08:29,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:08:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-07 10:08:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2019-09-07 10:08:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 10:08:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2019-09-07 10:08:29,582 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 116 [2019-09-07 10:08:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:29,583 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2019-09-07 10:08:29,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:08:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2019-09-07 10:08:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 10:08:29,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:29,584 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 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 10:08:29,584 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash 108084330, now seen corresponding path program 14 times [2019-09-07 10:08:29,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:29,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:29,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:29,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:08:29,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:08:29,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:29,784 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:08:29,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:08:29,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:08:29,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:08:29,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:08:29,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:08:29,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:29,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:08:29,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:08:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:08:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:08:29,932 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 18 states. [2019-09-07 10:08:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:30,195 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2019-09-07 10:08:30,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:08:30,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 123 [2019-09-07 10:08:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:30,198 INFO L225 Difference]: With dead ends: 242 [2019-09-07 10:08:30,198 INFO L226 Difference]: Without dead ends: 135 [2019-09-07 10:08:30,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:08:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-09-07 10:08:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-09-07 10:08:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 10:08:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2019-09-07 10:08:30,207 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 123 [2019-09-07 10:08:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:30,209 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2019-09-07 10:08:30,209 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:08:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2019-09-07 10:08:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 10:08:30,210 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:30,210 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 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 10:08:30,211 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1972607623, now seen corresponding path program 15 times [2019-09-07 10:08:30,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:30,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:30,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:30,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:08:30,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 10:08:30,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:30,423 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:08:30,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:09:24,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 10:09:24,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:09:24,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:09:24,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:09:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 10:09:24,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:09:24,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 10:09:24,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:09:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:09:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:09:24,795 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 19 states. [2019-09-07 10:09:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:09:24,997 INFO L93 Difference]: Finished difference Result 255 states and 275 transitions. [2019-09-07 10:09:24,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:09:24,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2019-09-07 10:09:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:09:24,999 INFO L225 Difference]: With dead ends: 255 [2019-09-07 10:09:24,999 INFO L226 Difference]: Without dead ends: 142 [2019-09-07 10:09:25,000 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:09:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-09-07 10:09:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-09-07 10:09:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 10:09:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2019-09-07 10:09:25,006 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 130 [2019-09-07 10:09:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:09:25,007 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2019-09-07 10:09:25,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:09:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2019-09-07 10:09:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 10:09:25,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:09:25,009 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 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 10:09:25,009 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:09:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:09:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash 795738570, now seen corresponding path program 16 times [2019-09-07 10:09:25,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:09:25,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:09:25,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:25,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:09:25,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:09:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-09-07 10:09:25,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:09:25,273 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:09:25,283 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:09:25,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:09:25,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:09:25,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:09:25,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:09:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-09-07 10:09:25,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:09:25,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:09:25,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:09:25,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:09:25,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:09:25,405 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 20 states. [2019-09-07 10:09:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:09:25,628 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2019-09-07 10:09:25,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:09:25,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2019-09-07 10:09:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:09:25,630 INFO L225 Difference]: With dead ends: 268 [2019-09-07 10:09:25,630 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 10:09:25,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:09:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 10:09:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-09-07 10:09:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-09-07 10:09:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2019-09-07 10:09:25,638 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 137 [2019-09-07 10:09:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:09:25,638 INFO L475 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2019-09-07 10:09:25,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:09:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2019-09-07 10:09:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-07 10:09:25,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:09:25,640 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 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 10:09:25,640 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:09:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:09:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1299634649, now seen corresponding path program 17 times [2019-09-07 10:09:25,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:09:25,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:09:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:25,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:09:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:09:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:09:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-09-07 10:09:25,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:09:25,877 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:09:25,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:10:51,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 10:10:51,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:10:51,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:10:51,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:10:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-09-07 10:10:51,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:10:51,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:10:51,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:10:51,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:10:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:10:51,525 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand 21 states. [2019-09-07 10:10:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:10:51,729 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2019-09-07 10:10:51,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:10:51,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2019-09-07 10:10:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:10:51,731 INFO L225 Difference]: With dead ends: 281 [2019-09-07 10:10:51,731 INFO L226 Difference]: Without dead ends: 156 [2019-09-07 10:10:51,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:10:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-07 10:10:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-07 10:10:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 10:10:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2019-09-07 10:10:51,738 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 144 [2019-09-07 10:10:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:10:51,739 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2019-09-07 10:10:51,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:10:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2019-09-07 10:10:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 10:10:51,740 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:10:51,741 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 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 10:10:51,741 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:10:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:10:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1395122390, now seen corresponding path program 18 times [2019-09-07 10:10:51,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:10:51,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:10:51,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:10:51,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:10:51,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:10:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:10:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2019-09-07 10:10:52,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:10:52,048 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:10:52,066 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:12:05,767 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 10:12:05,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:12:05,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-07 10:12:05,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:12:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 108 proven. 171 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-09-07 10:12:05,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:12:05,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-09-07 10:12:05,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:12:05,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:12:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:12:05,912 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 23 states. [2019-09-07 10:12:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:12:06,190 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2019-09-07 10:12:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:12:06,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 151 [2019-09-07 10:12:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:12:06,192 INFO L225 Difference]: With dead ends: 294 [2019-09-07 10:12:06,192 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 10:12:06,193 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:12:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 10:12:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2019-09-07 10:12:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-09-07 10:12:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2019-09-07 10:12:06,199 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 151 [2019-09-07 10:12:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:12:06,199 INFO L475 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2019-09-07 10:12:06,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:12:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2019-09-07 10:12:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-07 10:12:06,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:12:06,201 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 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 10:12:06,201 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:12:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:12:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2083903943, now seen corresponding path program 19 times [2019-09-07 10:12:06,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:12:06,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:12:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:06,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:12:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:12:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2019-09-07 10:12:06,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:12:06,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:12:06,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:12:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:12:06,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:12:06,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:12:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2019-09-07 10:12:06,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:12:06,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:12:06,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:12:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:12:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:12:06,791 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand 23 states. [2019-09-07 10:12:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:12:07,125 INFO L93 Difference]: Finished difference Result 307 states and 327 transitions. [2019-09-07 10:12:07,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:12:07,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2019-09-07 10:12:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:12:07,128 INFO L225 Difference]: With dead ends: 307 [2019-09-07 10:12:07,128 INFO L226 Difference]: Without dead ends: 170 [2019-09-07 10:12:07,129 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:12:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-09-07 10:12:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2019-09-07 10:12:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-07 10:12:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2019-09-07 10:12:07,138 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 158 [2019-09-07 10:12:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:12:07,139 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2019-09-07 10:12:07,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:12:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2019-09-07 10:12:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-07 10:12:07,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:12:07,140 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 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 10:12:07,141 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:12:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:12:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 285054090, now seen corresponding path program 20 times [2019-09-07 10:12:07,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:12:07,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:12:07,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:07,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:12:07,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:12:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2019-09-07 10:12:07,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:12:07,462 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:12:07,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:12:07,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:12:07,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:12:07,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:12:07,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:12:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2019-09-07 10:12:07,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:12:07,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:12:07,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:12:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:12:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:12:07,623 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 24 states. [2019-09-07 10:12:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:12:07,927 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2019-09-07 10:12:07,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:12:07,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2019-09-07 10:12:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:12:07,931 INFO L225 Difference]: With dead ends: 320 [2019-09-07 10:12:07,931 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 10:12:07,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:12:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 10:12:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-09-07 10:12:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 10:12:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2019-09-07 10:12:07,940 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 165 [2019-09-07 10:12:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:12:07,940 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2019-09-07 10:12:07,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:12:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2019-09-07 10:12:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-07 10:12:07,945 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:12:07,945 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 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 10:12:07,945 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:12:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:12:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1930147175, now seen corresponding path program 21 times [2019-09-07 10:12:07,946 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:12:07,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:12:07,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:07,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:12:07,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:12:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:12:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2019-09-07 10:12:08,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:12:08,335 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:12:08,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:13:25,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 10:13:25,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:25,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:13:25,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2019-09-07 10:13:25,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:25,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:13:25,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:13:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:13:25,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:13:25,766 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand 25 states. [2019-09-07 10:13:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:26,097 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2019-09-07 10:13:26,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:13:26,097 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 172 [2019-09-07 10:13:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:26,098 INFO L225 Difference]: With dead ends: 333 [2019-09-07 10:13:26,098 INFO L226 Difference]: Without dead ends: 184 [2019-09-07 10:13:26,099 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:13:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-07 10:13:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2019-09-07 10:13:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-07 10:13:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2019-09-07 10:13:26,106 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 172 [2019-09-07 10:13:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:26,107 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2019-09-07 10:13:26,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:13:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2019-09-07 10:13:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-07 10:13:26,108 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:26,108 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 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 10:13:26,108 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash -676568598, now seen corresponding path program 22 times [2019-09-07 10:13:26,109 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:26,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:26,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:26,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:26,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-09-07 10:13:26,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:26,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:26,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:27,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:13:27,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:27,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:13:27,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-09-07 10:13:27,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:27,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:13:27,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:13:27,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:13:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:13:27,154 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand 26 states. [2019-09-07 10:13:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:27,483 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2019-09-07 10:13:27,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:13:27,484 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2019-09-07 10:13:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:27,486 INFO L225 Difference]: With dead ends: 346 [2019-09-07 10:13:27,486 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 10:13:27,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:13:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 10:13:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-09-07 10:13:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-09-07 10:13:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 198 transitions. [2019-09-07 10:13:27,495 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 198 transitions. Word has length 179 [2019-09-07 10:13:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:27,495 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 198 transitions. [2019-09-07 10:13:27,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:13:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 198 transitions. [2019-09-07 10:13:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 10:13:27,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:27,497 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 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 10:13:27,497 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -33769209, now seen corresponding path program 23 times [2019-09-07 10:13:27,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:27,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:27,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:27,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:27,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2019-09-07 10:13:28,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:28,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:28,029 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:15:29,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 10:15:29,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:15:29,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:15:29,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:15:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2019-09-07 10:15:29,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:15:29,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 10:15:29,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:15:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:15:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:15:29,579 INFO L87 Difference]: Start difference. First operand 191 states and 198 transitions. Second operand 27 states. [2019-09-07 10:15:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:15:29,876 INFO L93 Difference]: Finished difference Result 359 states and 379 transitions. [2019-09-07 10:15:29,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:15:29,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 186 [2019-09-07 10:15:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:15:29,878 INFO L225 Difference]: With dead ends: 359 [2019-09-07 10:15:29,878 INFO L226 Difference]: Without dead ends: 198 [2019-09-07 10:15:29,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:15:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-09-07 10:15:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-09-07 10:15:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-09-07 10:15:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2019-09-07 10:15:29,889 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 186 [2019-09-07 10:15:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:15:29,889 INFO L475 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2019-09-07 10:15:29,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:15:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2019-09-07 10:15:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-07 10:15:29,890 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:15:29,890 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 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 10:15:29,891 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:15:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:15:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1177716554, now seen corresponding path program 24 times [2019-09-07 10:15:29,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:15:29,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:15:29,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:29,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:15:29,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 10:15:30,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:15:30,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:15:30,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:17:20,269 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:17:20,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:17:20,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 10:17:20,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 10:17:20,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:20,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 10:17:20,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 10:17:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 10:17:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:17:20,404 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand 28 states. [2019-09-07 10:17:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:20,810 INFO L93 Difference]: Finished difference Result 372 states and 392 transitions. [2019-09-07 10:17:20,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 10:17:20,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 193 [2019-09-07 10:17:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:20,812 INFO L225 Difference]: With dead ends: 372 [2019-09-07 10:17:20,812 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 10:17:20,814 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:17:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 10:17:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-09-07 10:17:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 10:17:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2019-09-07 10:17:20,823 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 193 [2019-09-07 10:17:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:20,824 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2019-09-07 10:17:20,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 10:17:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2019-09-07 10:17:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-07 10:17:20,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:20,826 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 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 10:17:20,827 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1786438823, now seen corresponding path program 25 times [2019-09-07 10:17:20,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:20,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:20,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:17:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2019-09-07 10:17:21,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:21,318 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:17:21,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:17:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:21,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:17:21,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2019-09-07 10:17:21,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:21,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 10:17:21,510 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:17:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:17:21,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:17:21,511 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand 29 states. [2019-09-07 10:17:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:21,995 INFO L93 Difference]: Finished difference Result 385 states and 405 transitions. [2019-09-07 10:17:21,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:17:21,996 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 200 [2019-09-07 10:17:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:21,997 INFO L225 Difference]: With dead ends: 385 [2019-09-07 10:17:21,998 INFO L226 Difference]: Without dead ends: 212 [2019-09-07 10:17:21,999 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:17:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-07 10:17:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-09-07 10:17:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-07 10:17:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2019-09-07 10:17:22,008 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 200 [2019-09-07 10:17:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:22,008 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2019-09-07 10:17:22,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:17:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2019-09-07 10:17:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-07 10:17:22,009 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:22,009 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 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 10:17:22,010 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1264452778, now seen corresponding path program 26 times [2019-09-07 10:17:22,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:22,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:22,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:17:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2019-09-07 10:17:22,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:22,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:17:22,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:17:22,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:17:22,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:17:22,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:17:22,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2019-09-07 10:17:22,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:22,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 10:17:22,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:17:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:17:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:17:22,793 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand 30 states. [2019-09-07 10:17:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:23,195 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2019-09-07 10:17:23,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:17:23,196 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 207 [2019-09-07 10:17:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:23,198 INFO L225 Difference]: With dead ends: 398 [2019-09-07 10:17:23,198 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 10:17:23,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:17:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 10:17:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2019-09-07 10:17:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-09-07 10:17:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 226 transitions. [2019-09-07 10:17:23,207 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 226 transitions. Word has length 207 [2019-09-07 10:17:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:23,208 INFO L475 AbstractCegarLoop]: Abstraction has 219 states and 226 transitions. [2019-09-07 10:17:23,208 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:17:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 226 transitions. [2019-09-07 10:17:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-07 10:17:23,209 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:23,209 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 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 10:17:23,210 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 209205319, now seen corresponding path program 27 times [2019-09-07 10:17:23,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:23,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:23,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:23,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:17:23,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2019-09-07 10:17:23,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:23,775 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:17:23,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:27,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 10:19:27,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:27,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-07 10:19:27,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2019-09-07 10:19:27,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:27,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-09-07 10:19:27,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:19:27,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:19:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:27,162 INFO L87 Difference]: Start difference. First operand 219 states and 226 transitions. Second operand 32 states. [2019-09-07 10:19:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:27,664 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2019-09-07 10:19:27,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:19:27,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 214 [2019-09-07 10:19:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:27,666 INFO L225 Difference]: With dead ends: 411 [2019-09-07 10:19:27,666 INFO L226 Difference]: Without dead ends: 226 [2019-09-07 10:19:27,667 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-09-07 10:19:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2019-09-07 10:19:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 10:19:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2019-09-07 10:19:27,675 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 214 [2019-09-07 10:19:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:27,675 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2019-09-07 10:19:27,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:19:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2019-09-07 10:19:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-07 10:19:27,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:27,677 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 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 10:19:27,677 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1602017802, now seen corresponding path program 28 times [2019-09-07 10:19:27,678 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:27,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:27,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:27,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:27,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2019-09-07 10:19:28,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:28,362 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:28,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:19:28,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:19:28,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:28,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:19:28,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2019-09-07 10:19:28,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:28,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 10:19:28,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:19:28,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:19:28,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:28,573 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand 32 states. [2019-09-07 10:19:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:28,954 INFO L93 Difference]: Finished difference Result 424 states and 444 transitions. [2019-09-07 10:19:28,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:19:28,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 221 [2019-09-07 10:19:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:28,956 INFO L225 Difference]: With dead ends: 424 [2019-09-07 10:19:28,956 INFO L226 Difference]: Without dead ends: 233 [2019-09-07 10:19:28,959 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-09-07 10:19:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2019-09-07 10:19:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-09-07 10:19:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 240 transitions. [2019-09-07 10:19:28,970 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 240 transitions. Word has length 221 [2019-09-07 10:19:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:28,971 INFO L475 AbstractCegarLoop]: Abstraction has 233 states and 240 transitions. [2019-09-07 10:19:28,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:19:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 240 transitions. [2019-09-07 10:19:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 10:19:28,973 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:28,973 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 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 10:19:28,974 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1583789031, now seen corresponding path program 29 times [2019-09-07 10:19:28,975 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:28,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:28,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:28,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:28,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2019-09-07 10:19:29,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:29,707 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:29,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1