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_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:29:53,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:29:53,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:29:53,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:29:53,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:29:53,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:29:53,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:29:53,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:29:53,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:29:53,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:29:53,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:29:53,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:29:53,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:29:53,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:29:53,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:29:53,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:29:53,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:29:53,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:29:53,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:29:53,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:29:53,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:29:53,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:29:53,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:29:53,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:29:53,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:29:53,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:29:53,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:29:53,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:29:53,480 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 09:29:53,502 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:29:53,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:29:53,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:29:53,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:29:53,505 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:29:53,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:29:53,506 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:29:53,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:29:53,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:29:53,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:29:53,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:29:53,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:29:53,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:29:53,508 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:29:53,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:29:53,509 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:29:53,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:29:53,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:29:53,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:29:53,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:29:53,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:29:53,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:29:53,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:29:53,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:29:53,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:29:53,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:29:53,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:29:53,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:29:53,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:29:53,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:29:53,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:29:53,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:29:53,592 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:29:53,592 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:29:53,593 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-09-07 09:29:53,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ed3f672e/40fa1875f5d345058f4f53763ae18db3/FLAGf79e4604d [2019-09-07 09:29:54,095 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:29:54,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-09-07 09:29:54,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ed3f672e/40fa1875f5d345058f4f53763ae18db3/FLAGf79e4604d [2019-09-07 09:29:54,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ed3f672e/40fa1875f5d345058f4f53763ae18db3 [2019-09-07 09:29:54,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:29:54,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:29:54,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:54,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:29:54,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:29:54,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635b5632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54, skipping insertion in model container [2019-09-07 09:29:54,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,531 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:29:54,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:29:54,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:54,721 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:29:54,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:54,758 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:29:54,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54 WrapperNode [2019-09-07 09:29:54,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:54,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:29:54,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:29:54,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:29:54,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (1/1) ... [2019-09-07 09:29:54,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:29:54,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:29:54,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:29:54,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:29:54,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (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 09:29:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:29:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:29:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:29:54,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:29:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:29:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:29:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:29:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:29:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:29:55,183 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:29:55,183 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 09:29:55,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:55 BoogieIcfgContainer [2019-09-07 09:29:55,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:29:55,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:29:55,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:29:55,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:29:55,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:29:54" (1/3) ... [2019-09-07 09:29:55,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77213658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:55, skipping insertion in model container [2019-09-07 09:29:55,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:54" (2/3) ... [2019-09-07 09:29:55,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77213658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:55, skipping insertion in model container [2019-09-07 09:29:55,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:55" (3/3) ... [2019-09-07 09:29:55,193 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2019-09-07 09:29:55,206 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:29:55,216 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:29:55,238 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:29:55,312 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:29:55,313 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:29:55,313 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:29:55,316 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:29:55,316 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:29:55,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:29:55,317 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:29:55,317 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:29:55,317 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:29:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-07 09:29:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:29:55,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:55,347 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:55,349 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2019-09-07 09:29:55,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:55,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:55,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:55,484 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 09:29:55,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:55,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:29:55,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:29:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:29:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:29:55,502 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-07 09:29:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:55,529 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-09-07 09:29:55,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:29:55,531 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-07 09:29:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:55,539 INFO L225 Difference]: With dead ends: 46 [2019-09-07 09:29:55,540 INFO L226 Difference]: Without dead ends: 22 [2019-09-07 09:29:55,544 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 09:29:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-07 09:29:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-07 09:29:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-07 09:29:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-09-07 09:29:55,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-09-07 09:29:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:55,589 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-09-07 09:29:55,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:29:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-09-07 09:29:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:29:55,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:55,591 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:55,591 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2019-09-07 09:29:55,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:55,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:55,713 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 09:29:55,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:55,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:55,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:55,718 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2019-09-07 09:29:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:55,760 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-09-07 09:29:55,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:55,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-07 09:29:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:55,762 INFO L225 Difference]: With dead ends: 38 [2019-09-07 09:29:55,762 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 09:29:55,764 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 09:29:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 09:29:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-07 09:29:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-07 09:29:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-07 09:29:55,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-09-07 09:29:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:55,775 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-07 09:29:55,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-07 09:29:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:29:55,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:55,780 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:55,780 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2019-09-07 09:29:55,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:55,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:55,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:55,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:55,874 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:55,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:55,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:55,875 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-09-07 09:29:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:55,897 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-09-07 09:29:55,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:55,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 09:29:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:55,899 INFO L225 Difference]: With dead ends: 36 [2019-09-07 09:29:55,899 INFO L226 Difference]: Without dead ends: 25 [2019-09-07 09:29:55,900 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 09:29:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-07 09:29:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-07 09:29:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 09:29:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-07 09:29:55,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-09-07 09:29:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:55,907 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-07 09:29:55,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-07 09:29:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:29:55,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:55,909 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:55,909 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2019-09-07 09:29:55,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:55,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:55,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:55,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:55,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:55,978 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:55,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:56,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:29:56,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:56,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:56,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:29:56,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:29:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:29:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:29:56,082 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-09-07 09:29:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:56,123 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-07 09:29:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:29:56,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-07 09:29:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:56,125 INFO L225 Difference]: With dead ends: 42 [2019-09-07 09:29:56,125 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 09:29:56,126 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 09:29:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 09:29:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-07 09:29:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 09:29:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-09-07 09:29:56,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-09-07 09:29:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:56,138 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-09-07 09:29:56,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:29:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-09-07 09:29:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:29:56,141 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:56,141 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:56,141 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash 64185792, now seen corresponding path program 2 times [2019-09-07 09:29:56,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:56,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:56,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:56,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:29:56,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:56,206 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 09:29:56,225 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 09:29:56,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:56,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:56,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:29:56,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:56,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:56,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 09:29:56,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:56,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:56,294 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-09-07 09:29:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:56,351 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-09-07 09:29:56,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:29:56,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-09-07 09:29:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:56,353 INFO L225 Difference]: With dead ends: 47 [2019-09-07 09:29:56,353 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 09:29:56,353 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 09:29:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-07 09:29:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 09:29:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-07 09:29:56,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2019-09-07 09:29:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:56,360 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-07 09:29:56,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-07 09:29:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 09:29:56,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:56,362 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:56,362 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash 683083068, now seen corresponding path program 3 times [2019-09-07 09:29:56,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:56,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:56,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:56,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:56,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:29:56,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:56,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:29:56,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:56,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:29:56,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:56,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:56,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:29:56,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:29:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:29:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:29:56,525 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2019-09-07 09:29:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:56,553 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-07 09:29:56,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:29:56,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-09-07 09:29:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:56,555 INFO L225 Difference]: With dead ends: 44 [2019-09-07 09:29:56,555 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 09:29:56,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 09:29:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 09:29:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-07 09:29:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:29:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-07 09:29:56,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2019-09-07 09:29:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:56,562 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-07 09:29:56,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:29:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-07 09:29:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:29:56,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:56,563 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:56,564 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 4 times [2019-09-07 09:29:56,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:56,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:56,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:56,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:56,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:56,649 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 09:29:56,665 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 09:29:56,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:56,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:56,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:29:56,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:56,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:56,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:29:56,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:56,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:56,726 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2019-09-07 09:29:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:56,772 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-09-07 09:29:56,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:29:56,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-07 09:29:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:56,774 INFO L225 Difference]: With dead ends: 54 [2019-09-07 09:29:56,774 INFO L226 Difference]: Without dead ends: 35 [2019-09-07 09:29:56,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 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 09:29:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-07 09:29:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-07 09:29:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 09:29:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-09-07 09:29:56,785 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2019-09-07 09:29:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:56,786 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-09-07 09:29:56,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-09-07 09:29:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:29:56,789 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:56,789 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:56,790 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1626114376, now seen corresponding path program 5 times [2019-09-07 09:29:56,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:56,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:56,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:56,895 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:29:56,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:56,959 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:29:56,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:56,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:29:56,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:56,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:56,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:29:56,986 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:56,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:56,987 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2019-09-07 09:29:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:57,027 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-09-07 09:29:57,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:29:57,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-09-07 09:29:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:57,029 INFO L225 Difference]: With dead ends: 48 [2019-09-07 09:29:57,029 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 09:29:57,031 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 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 09:29:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 09:29:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-07 09:29:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 09:29:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-07 09:29:57,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2019-09-07 09:29:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:57,037 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-07 09:29:57,037 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-07 09:29:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:29:57,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:57,038 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:57,039 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 6 times [2019-09-07 09:29:57,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:57,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:57,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:57,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:57,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:57,117 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:57,132 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:29:57,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:29:57,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:57,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:29:57,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:57,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:57,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:29:57,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:29:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:29:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:29:57,229 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2019-09-07 09:29:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:57,305 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2019-09-07 09:29:57,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:29:57,305 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-09-07 09:29:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:57,306 INFO L225 Difference]: With dead ends: 63 [2019-09-07 09:29:57,307 INFO L226 Difference]: Without dead ends: 42 [2019-09-07 09:29:57,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:29:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-07 09:29:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-09-07 09:29:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:29:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-09-07 09:29:57,313 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2019-09-07 09:29:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:57,313 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-09-07 09:29:57,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:29:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-09-07 09:29:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:29:57,314 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:57,314 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:57,315 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 7 times [2019-09-07 09:29:57,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:57,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:57,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:57,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:29:57,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:57,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:57,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:57,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:29:57,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:29:57,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:57,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:29:57,468 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:29:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:29:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:29:57,469 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2019-09-07 09:29:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:57,505 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2019-09-07 09:29:57,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:29:57,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-09-07 09:29:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:57,506 INFO L225 Difference]: With dead ends: 66 [2019-09-07 09:29:57,506 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:29:57,507 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 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 09:29:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:29:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-07 09:29:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:29:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-07 09:29:57,513 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2019-09-07 09:29:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:57,513 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-07 09:29:57,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:29:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-07 09:29:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:29:57,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:57,515 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:57,515 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:57,516 INFO L82 PathProgramCache]: Analyzing trace with hash 551735216, now seen corresponding path program 8 times [2019-09-07 09:29:57,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:57,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:57,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:57,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:29:57,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:57,592 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:57,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:29:57,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:57,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:57,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:57,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:29:57,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:57,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:29:57,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:29:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:29:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:57,763 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 15 states. [2019-09-07 09:29:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:57,837 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2019-09-07 09:29:57,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:29:57,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-09-07 09:29:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:57,839 INFO L225 Difference]: With dead ends: 71 [2019-09-07 09:29:57,840 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 09:29:57,841 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 09:29:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-09-07 09:29:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 09:29:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-09-07 09:29:57,852 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2019-09-07 09:29:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:57,854 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-09-07 09:29:57,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:29:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-09-07 09:29:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 09:29:57,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:57,856 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:57,856 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1469335764, now seen corresponding path program 9 times [2019-09-07 09:29:57,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:57,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:57,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:57,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:57,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:57,973 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 09:29:57,987 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 09:29:58,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:29:58,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:58,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:58,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:29:58,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:58,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:29:58,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:29:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:29:58,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:58,123 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2019-09-07 09:29:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:58,160 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-09-07 09:29:58,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:29:58,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-09-07 09:29:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:58,161 INFO L225 Difference]: With dead ends: 60 [2019-09-07 09:29:58,162 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 09:29:58,162 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 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 09:29:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 09:29:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-07 09:29:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 09:29:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-09-07 09:29:58,168 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2019-09-07 09:29:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:58,168 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-09-07 09:29:58,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:29:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-09-07 09:29:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 09:29:58,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:58,169 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:58,169 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:58,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 10 times [2019-09-07 09:29:58,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:58,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:58,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:58,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:58,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:58,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:29:58,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:29:58,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:58,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:58,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:29:58,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:58,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:58,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:29:58,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:29:58,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:29:58,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:29:58,344 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2019-09-07 09:29:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:58,388 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2019-09-07 09:29:58,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:29:58,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-09-07 09:29:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:58,389 INFO L225 Difference]: With dead ends: 78 [2019-09-07 09:29:58,390 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 09:29:58,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 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 09:29:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 09:29:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-07 09:29:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-07 09:29:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-09-07 09:29:58,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2019-09-07 09:29:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:58,401 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-09-07 09:29:58,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:29:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-09-07 09:29:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 09:29:58,404 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:58,404 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:58,404 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2040098984, now seen corresponding path program 11 times [2019-09-07 09:29:58,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:58,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:58,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:58,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:29:58,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:58,512 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:58,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:29:58,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:29:58,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:58,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:29:58,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:59,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:59,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-09-07 09:29:59,035 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:29:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:29:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:29:59,036 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2019-09-07 09:29:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:59,138 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-09-07 09:29:59,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:29:59,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2019-09-07 09:29:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:59,139 INFO L225 Difference]: With dead ends: 83 [2019-09-07 09:29:59,139 INFO L226 Difference]: Without dead ends: 56 [2019-09-07 09:29:59,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:29:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-07 09:29:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-09-07 09:29:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 09:29:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-09-07 09:29:59,150 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2019-09-07 09:29:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:59,151 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-09-07 09:29:59,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:29:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-09-07 09:29:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 09:29:59,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:59,152 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:59,152 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1043790884, now seen corresponding path program 12 times [2019-09-07 09:29:59,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:59,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:59,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:59,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:59,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:29:59,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:59,263 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) [2019-09-07 09:29:59,290 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:59,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:29:59,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:59,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:29:59,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:29:59,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:59,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:29:59,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:29:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:29:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:29:59,615 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2019-09-07 09:29:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:59,718 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-09-07 09:29:59,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:29:59,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2019-09-07 09:29:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:59,719 INFO L225 Difference]: With dead ends: 89 [2019-09-07 09:29:59,719 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:29:59,720 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:29:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:29:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-09-07 09:29:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 09:29:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-09-07 09:29:59,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2019-09-07 09:29:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:59,725 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-09-07 09:29:59,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:29:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-09-07 09:29:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 09:29:59,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:59,726 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:59,727 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1316005472, now seen corresponding path program 13 times [2019-09-07 09:29:59,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:59,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:59,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:29:59,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:59,822 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 09:29:59,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:59,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:29:59,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:30:00,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:00,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:30:00,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:30:00,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:30:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:30:00,014 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2019-09-07 09:30:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:00,143 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2019-09-07 09:30:00,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:30:00,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2019-09-07 09:30:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:00,144 INFO L225 Difference]: With dead ends: 95 [2019-09-07 09:30:00,144 INFO L226 Difference]: Without dead ends: 64 [2019-09-07 09:30:00,146 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:30:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-07 09:30:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-09-07 09:30:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 09:30:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-09-07 09:30:00,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2019-09-07 09:30:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:00,151 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-09-07 09:30:00,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:30:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-09-07 09:30:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 09:30:00,152 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:00,152 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:00,152 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 544049436, now seen corresponding path program 14 times [2019-09-07 09:30:00,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:00,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:00,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:00,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:30:00,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:00,263 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 09:30:00,276 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 09:30:00,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:30:00,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:00,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:30:00,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:30:00,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:00,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:30:00,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:30:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:30:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:30:00,472 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2019-09-07 09:30:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:00,573 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-09-07 09:30:00,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:30:00,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-09-07 09:30:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:00,575 INFO L225 Difference]: With dead ends: 101 [2019-09-07 09:30:00,575 INFO L226 Difference]: Without dead ends: 68 [2019-09-07 09:30:00,576 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:30:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-07 09:30:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-09-07 09:30:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:30:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-09-07 09:30:00,588 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 57 [2019-09-07 09:30:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:00,590 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-09-07 09:30:00,590 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:30:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-09-07 09:30:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:30:00,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:00,591 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:00,591 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:00,592 INFO L82 PathProgramCache]: Analyzing trace with hash -384005480, now seen corresponding path program 15 times [2019-09-07 09:30:00,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:00,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:00,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:00,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:30:00,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:00,726 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 09:30:00,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:30:01,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:30:01,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:01,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:30:01,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:30:01,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:01,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:30:01,510 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:30:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:30:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:30:01,511 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2019-09-07 09:30:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:01,557 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2019-09-07 09:30:01,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:30:01,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-09-07 09:30:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:01,558 INFO L225 Difference]: With dead ends: 80 [2019-09-07 09:30:01,558 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 09:30:01,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 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 09:30:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 09:30:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-09-07 09:30:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 09:30:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-09-07 09:30:01,565 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2019-09-07 09:30:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:01,565 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-09-07 09:30:01,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:30:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-09-07 09:30:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 09:30:01,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:01,566 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:01,566 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash 367873014, now seen corresponding path program 16 times [2019-09-07 09:30:01,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:01,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:01,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:01,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:01,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:30:01,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:01,724 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) [2019-09-07 09:30:01,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:01,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:30:01,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:01,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:30:01,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:30:01,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:01,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:30:01,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:30:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:30:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:30:01,807 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2019-09-07 09:30:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:01,853 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2019-09-07 09:30:01,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:30:01,855 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-09-07 09:30:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:01,855 INFO L225 Difference]: With dead ends: 108 [2019-09-07 09:30:01,855 INFO L226 Difference]: Without dead ends: 71 [2019-09-07 09:30:01,856 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 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 09:30:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-07 09:30:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-09-07 09:30:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 09:30:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-09-07 09:30:01,860 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2019-09-07 09:30:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:01,861 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-09-07 09:30:01,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:30:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-09-07 09:30:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 09:30:01,862 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:01,862 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:01,862 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash -77111788, now seen corresponding path program 17 times [2019-09-07 09:30:01,863 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:01,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:01,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:01,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:01,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:30:02,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:02,000 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 09:30:02,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:30:05,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 09:30:05,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:05,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:30:05,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:30:05,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:05,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:30:05,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:30:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:30:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:30:05,402 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2019-09-07 09:30:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:05,453 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2019-09-07 09:30:05,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:30:05,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-09-07 09:30:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:05,455 INFO L225 Difference]: With dead ends: 84 [2019-09-07 09:30:05,455 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 09:30:05,456 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 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 09:30:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 09:30:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-09-07 09:30:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 09:30:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-09-07 09:30:05,459 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2019-09-07 09:30:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:05,460 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-09-07 09:30:05,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:30:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-09-07 09:30:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:30:05,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:05,461 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:05,461 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1060032398, now seen corresponding path program 18 times [2019-09-07 09:30:05,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:05,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:05,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:30:05,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:05,592 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 09:30:05,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:30:09,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-07 09:30:09,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:09,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:30:09,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 169 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:30:09,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:09,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2019-09-07 09:30:09,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 09:30:09,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 09:30:09,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2019-09-07 09:30:09,633 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 32 states. [2019-09-07 09:30:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:10,008 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2019-09-07 09:30:10,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 09:30:10,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2019-09-07 09:30:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:10,009 INFO L225 Difference]: With dead ends: 118 [2019-09-07 09:30:10,009 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 09:30:10,010 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 09:30:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 09:30:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-09-07 09:30:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-07 09:30:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-09-07 09:30:10,015 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 67 [2019-09-07 09:30:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:10,015 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-09-07 09:30:10,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 09:30:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-09-07 09:30:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 09:30:10,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:10,016 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:10,016 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1820558580, now seen corresponding path program 19 times [2019-09-07 09:30:10,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:10,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:10,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:10,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:30:10,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:10,161 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 09:30:10,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:10,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:30:10,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 09:30:10,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:10,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 09:30:10,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:30:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:30:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:30:10,523 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 33 states. [2019-09-07 09:30:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:10,652 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2019-09-07 09:30:10,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:30:10,654 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2019-09-07 09:30:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:10,655 INFO L225 Difference]: With dead ends: 125 [2019-09-07 09:30:10,655 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 09:30:10,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:30:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 09:30:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-09-07 09:30:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-07 09:30:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-09-07 09:30:10,660 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 73 [2019-09-07 09:30:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:10,660 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-09-07 09:30:10,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:30:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-09-07 09:30:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-07 09:30:10,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:10,662 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:10,662 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1348256904, now seen corresponding path program 20 times [2019-09-07 09:30:10,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:10,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:10,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:30:10,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:10,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:30:10,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:30:10,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:30:10,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:10,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:30:10,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:30:11,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:11,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2019-09-07 09:30:11,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 09:30:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 09:30:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:30:11,145 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 35 states. [2019-09-07 09:30:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:11,302 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2019-09-07 09:30:11,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 09:30:11,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2019-09-07 09:30:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:11,305 INFO L225 Difference]: With dead ends: 131 [2019-09-07 09:30:11,305 INFO L226 Difference]: Without dead ends: 88 [2019-09-07 09:30:11,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:30:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-07 09:30:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2019-09-07 09:30:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 09:30:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-09-07 09:30:11,313 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2019-09-07 09:30:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:11,313 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-09-07 09:30:11,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 09:30:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-09-07 09:30:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 09:30:11,314 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:11,314 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:11,315 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash -989536252, now seen corresponding path program 21 times [2019-09-07 09:30:11,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:11,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:11,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:11,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:11,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:30:11,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:11,545 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) [2019-09-07 09:30:11,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:19,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-07 09:30:19,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:19,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:30:19,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 33 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:30:19,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:19,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 22 [2019-09-07 09:30:19,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:30:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:30:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:30:19,882 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2019-09-07 09:30:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:20,219 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2019-09-07 09:30:20,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:30:20,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2019-09-07 09:30:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:20,221 INFO L225 Difference]: With dead ends: 100 [2019-09-07 09:30:20,221 INFO L226 Difference]: Without dead ends: 89 [2019-09-07 09:30:20,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=536, Invalid=946, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:30:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-07 09:30:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-09-07 09:30:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 09:30:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2019-09-07 09:30:20,227 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2019-09-07 09:30:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:20,227 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2019-09-07 09:30:20,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:30:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2019-09-07 09:30:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:30:20,228 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:20,228 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:20,228 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613918, now seen corresponding path program 22 times [2019-09-07 09:30:20,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:20,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:20,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:20,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:20,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:30:20,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:20,597 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:20,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:30:20,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:30:20,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:20,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:30:20,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:30:21,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:21,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-09-07 09:30:21,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 09:30:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 09:30:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 09:30:21,051 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 38 states. [2019-09-07 09:30:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:21,201 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2019-09-07 09:30:21,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 09:30:21,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2019-09-07 09:30:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:21,202 INFO L225 Difference]: With dead ends: 141 [2019-09-07 09:30:21,202 INFO L226 Difference]: Without dead ends: 94 [2019-09-07 09:30:21,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 09:30:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-07 09:30:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-09-07 09:30:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 09:30:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-09-07 09:30:21,209 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2019-09-07 09:30:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:21,209 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-09-07 09:30:21,210 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 09:30:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-09-07 09:30:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 09:30:21,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:21,211 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:21,211 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash 164328670, now seen corresponding path program 23 times [2019-09-07 09:30:21,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:21,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:21,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:21,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:21,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:30:21,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:21,435 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:30:21,446 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:31:06,769 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-07 09:31:06,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:06,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:31:06,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:31:06,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:06,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:31:06,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:31:06,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:31:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:31:06,825 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 22 states. [2019-09-07 09:31:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:06,882 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2019-09-07 09:31:06,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:31:06,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-09-07 09:31:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:06,883 INFO L225 Difference]: With dead ends: 144 [2019-09-07 09:31:06,883 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 09:31:06,884 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:31:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 09:31:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-09-07 09:31:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-07 09:31:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-09-07 09:31:06,889 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2019-09-07 09:31:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:06,889 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-09-07 09:31:06,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:31:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-09-07 09:31:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 09:31:06,890 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:06,891 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:06,891 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2074571524, now seen corresponding path program 24 times [2019-09-07 09:31:06,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:06,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:06,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:06,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:31:07,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:07,139 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) [2019-09-07 09:31:07,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:34,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-07 09:31:34,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:34,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:31:34,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:31:34,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:34,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:31:34,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:31:34,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:31:34,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:31:34,160 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 22 states. [2019-09-07 09:31:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:34,218 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2019-09-07 09:31:34,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:31:34,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-09-07 09:31:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:34,219 INFO L225 Difference]: With dead ends: 108 [2019-09-07 09:31:34,219 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 09:31:34,219 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:31:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 09:31:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-09-07 09:31:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 09:31:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-09-07 09:31:34,223 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2019-09-07 09:31:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:34,224 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-09-07 09:31:34,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:31:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-09-07 09:31:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 09:31:34,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:34,225 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:34,225 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -768457382, now seen corresponding path program 25 times [2019-09-07 09:31:34,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:34,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:34,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:34,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:31:34,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:34,461 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 09:31:34,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:34,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:31:34,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:31:34,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:34,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 09:31:34,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:31:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:31:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:31:34,534 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 23 states. [2019-09-07 09:31:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:34,612 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2019-09-07 09:31:34,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:31:34,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2019-09-07 09:31:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:34,616 INFO L225 Difference]: With dead ends: 150 [2019-09-07 09:31:34,617 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 09:31:34,617 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:31:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 09:31:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-09-07 09:31:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-07 09:31:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2019-09-07 09:31:34,622 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2019-09-07 09:31:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:34,622 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2019-09-07 09:31:34,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:31:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2019-09-07 09:31:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 09:31:34,623 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:34,623 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:34,623 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1843782024, now seen corresponding path program 26 times [2019-09-07 09:31:34,624 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:34,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:31:34,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:34,836 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:34,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:31:34,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:31:34,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:34,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:31:34,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:31:35,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:35,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2019-09-07 09:31:35,324 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 09:31:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 09:31:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:31:35,325 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 43 states. [2019-09-07 09:31:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:35,483 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2019-09-07 09:31:35,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 09:31:35,483 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2019-09-07 09:31:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:35,484 INFO L225 Difference]: With dead ends: 155 [2019-09-07 09:31:35,484 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 09:31:35,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:31:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 09:31:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-09-07 09:31:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-07 09:31:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2019-09-07 09:31:35,495 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 93 [2019-09-07 09:31:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:35,495 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2019-09-07 09:31:35,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 09:31:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2019-09-07 09:31:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:31:35,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:35,496 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:35,497 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash -573603340, now seen corresponding path program 27 times [2019-09-07 09:31:35,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:35,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:35,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:35,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:35,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:31:35,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:35,763 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:35,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:31:52,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-07 09:31:52,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:52,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:31:52,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 41 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:31:52,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:52,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 26 [2019-09-07 09:31:52,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 09:31:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 09:31:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2019-09-07 09:31:52,082 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 26 states. [2019-09-07 09:31:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:52,451 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2019-09-07 09:31:52,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:31:52,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2019-09-07 09:31:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:52,454 INFO L225 Difference]: With dead ends: 116 [2019-09-07 09:31:52,454 INFO L226 Difference]: Without dead ends: 105 [2019-09-07 09:31:52,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=786, Invalid=1376, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:31:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-07 09:31:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-09-07 09:31:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 09:31:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-09-07 09:31:52,460 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2019-09-07 09:31:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:52,460 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-09-07 09:31:52,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 09:31:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-09-07 09:31:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 09:31:52,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:52,461 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:52,461 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044014, now seen corresponding path program 28 times [2019-09-07 09:31:52,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:52,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:52,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:52,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:52,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:31:52,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:52,751 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 09:31:52,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:31:52,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:31:52,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:52,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:31:52,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:31:52,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:52,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:31:52,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:31:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:31:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:31:52,826 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 25 states. [2019-09-07 09:31:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:52,885 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2019-09-07 09:31:52,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:31:52,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2019-09-07 09:31:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:52,887 INFO L225 Difference]: With dead ends: 162 [2019-09-07 09:31:52,887 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 09:31:52,887 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 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 09:31:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 09:31:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-09-07 09:31:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:31:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2019-09-07 09:31:52,892 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2019-09-07 09:31:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:52,892 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2019-09-07 09:31:52,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:31:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2019-09-07 09:31:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:31:52,893 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:52,893 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:52,894 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -188500112, now seen corresponding path program 29 times [2019-09-07 09:31:52,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:52,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:52,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:52,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:52,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:31:53,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:53,182 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 09:31:53,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:33:24,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-07 09:33:24,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:24,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:33:24,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:33:25,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:25,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-09-07 09:33:25,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-07 09:33:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-07 09:33:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:33:25,408 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 47 states. [2019-09-07 09:33:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:25,565 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2019-09-07 09:33:25,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-07 09:33:25,565 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2019-09-07 09:33:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:25,566 INFO L225 Difference]: With dead ends: 167 [2019-09-07 09:33:25,566 INFO L226 Difference]: Without dead ends: 112 [2019-09-07 09:33:25,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:33:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-07 09:33:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-09-07 09:33:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-07 09:33:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-09-07 09:33:25,577 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 101 [2019-09-07 09:33:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:25,577 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-09-07 09:33:25,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-07 09:33:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-09-07 09:33:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-07 09:33:25,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:25,578 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:25,579 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash -171852052, now seen corresponding path program 30 times [2019-09-07 09:33:25,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:25,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:25,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:33:25,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:25,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:25,867 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:34:20,860 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-07 09:34:20,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:20,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 09:34:20,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:34:21,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:21,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2019-09-07 09:34:21,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-07 09:34:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-07 09:34:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 09:34:21,752 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 49 states. [2019-09-07 09:34:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:21,933 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2019-09-07 09:34:21,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-07 09:34:21,933 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2019-09-07 09:34:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:21,935 INFO L225 Difference]: With dead ends: 173 [2019-09-07 09:34:21,935 INFO L226 Difference]: Without dead ends: 116 [2019-09-07 09:34:21,936 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 09:34:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-07 09:34:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2019-09-07 09:34:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 09:34:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2019-09-07 09:34:21,946 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 105 [2019-09-07 09:34:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:21,946 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2019-09-07 09:34:21,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-07 09:34:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2019-09-07 09:34:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-07 09:34:21,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:21,947 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:21,948 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 286562408, now seen corresponding path program 31 times [2019-09-07 09:34:21,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:21,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:21,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:21,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:21,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:34:22,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:22,276 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:22,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:22,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:34:22,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:34:23,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:23,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2019-09-07 09:34:23,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-07 09:34:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-07 09:34:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:34:23,205 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 51 states. [2019-09-07 09:34:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:23,426 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2019-09-07 09:34:23,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-07 09:34:23,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2019-09-07 09:34:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:23,430 INFO L225 Difference]: With dead ends: 179 [2019-09-07 09:34:23,430 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 09:34:23,431 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:34:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 09:34:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2019-09-07 09:34:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 09:34:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2019-09-07 09:34:23,436 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 109 [2019-09-07 09:34:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:23,436 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2019-09-07 09:34:23,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-07 09:34:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2019-09-07 09:34:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 09:34:23,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:23,438 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:23,438 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 143082468, now seen corresponding path program 32 times [2019-09-07 09:34:23,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:23,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:23,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:23,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:34:23,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:23,752 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:23,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:34:23,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:34:23,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:23,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:34:23,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:34:24,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:24,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2019-09-07 09:34:24,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 09:34:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 09:34:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 09:34:24,409 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 53 states. [2019-09-07 09:34:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:24,654 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2019-09-07 09:34:24,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 09:34:24,655 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2019-09-07 09:34:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:24,656 INFO L225 Difference]: With dead ends: 185 [2019-09-07 09:34:24,656 INFO L226 Difference]: Without dead ends: 124 [2019-09-07 09:34:24,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 09:34:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-07 09:34:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2019-09-07 09:34:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:34:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2019-09-07 09:34:24,663 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 113 [2019-09-07 09:34:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:24,663 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2019-09-07 09:34:24,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 09:34:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2019-09-07 09:34:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 09:34:24,665 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:24,665 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:24,665 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1352351392, now seen corresponding path program 33 times [2019-09-07 09:34:24,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:24,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:24,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:24,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:34:25,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:25,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:25,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:35:43,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 09:35:43,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:43,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:35:43,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:35:43,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:43,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 09:35:43,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:35:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:35:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:35:43,761 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 29 states. [2019-09-07 09:35:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:43,869 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2019-09-07 09:35:43,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 09:35:43,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2019-09-07 09:35:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:43,871 INFO L225 Difference]: With dead ends: 136 [2019-09-07 09:35:43,871 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 09:35:43,871 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 117 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 09:35:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 09:35:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-09-07 09:35:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 09:35:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2019-09-07 09:35:43,876 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2019-09-07 09:35:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:43,876 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2019-09-07 09:35:43,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:35:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2019-09-07 09:35:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 09:35:43,878 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:43,878 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:43,878 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1795354814, now seen corresponding path program 34 times [2019-09-07 09:35:43,879 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:43,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:43,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:43,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:43,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:35:44,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:44,316 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:44,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:35:44,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:35:44,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:44,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:35:44,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:35:44,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:44,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 09:35:44,420 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:35:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:35:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:35:44,421 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 30 states. [2019-09-07 09:35:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:44,529 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2019-09-07 09:35:44,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:35:44,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 119 [2019-09-07 09:35:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:44,532 INFO L225 Difference]: With dead ends: 192 [2019-09-07 09:35:44,532 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 09:35:44,532 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:35:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 09:35:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-09-07 09:35:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 09:35:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2019-09-07 09:35:44,537 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2019-09-07 09:35:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:44,538 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2019-09-07 09:35:44,538 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:35:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2019-09-07 09:35:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 09:35:44,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:44,539 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:44,539 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1786253532, now seen corresponding path program 35 times [2019-09-07 09:35:44,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:44,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:44,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:44,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:44,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:35:44,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:44,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:44,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:37:59,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 09:37:59,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:59,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:37:59,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:37:59,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:59,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 09:37:59,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:37:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:37:59,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:37:59,874 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 30 states. [2019-09-07 09:37:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:59,987 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2019-09-07 09:37:59,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:37:59,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2019-09-07 09:37:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:59,989 INFO L225 Difference]: With dead ends: 140 [2019-09-07 09:37:59,989 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 09:37:59,989 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:37:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 09:37:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-09-07 09:37:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 09:37:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2019-09-07 09:37:59,994 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 121 [2019-09-07 09:37:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:59,995 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2019-09-07 09:37:59,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:37:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2019-09-07 09:37:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 09:37:59,996 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:59,996 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:59,996 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1367322310, now seen corresponding path program 36 times [2019-09-07 09:37:59,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:59,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:59,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:59,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:38:00,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:00,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:38:00,509 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:40:14,871 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-07 09:40:14,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:40:14,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-07 09:40:14,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:40:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-09-07 09:40:14,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:40:14,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-07 09:40:14,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:40:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:40:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:40:14,970 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 31 states. [2019-09-07 09:40:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:40:15,068 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2019-09-07 09:40:15,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:40:15,068 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 123 [2019-09-07 09:40:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:40:15,069 INFO L225 Difference]: With dead ends: 198 [2019-09-07 09:40:15,069 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 09:40:15,070 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:40:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 09:40:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-09-07 09:40:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-07 09:40:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2019-09-07 09:40:15,075 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2019-09-07 09:40:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:40:15,075 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2019-09-07 09:40:15,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:40:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2019-09-07 09:40:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-07 09:40:15,076 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:40:15,077 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:40:15,077 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:40:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:40:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1341377960, now seen corresponding path program 37 times [2019-09-07 09:40:15,077 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:40:15,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:40:15,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:15,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:40:15,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 09:40:15,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:40:15,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:40:15,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:40:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:15,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 09:40:15,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:40:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (38)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:40:16,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:40:16,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2019-09-07 09:40:16,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-07 09:40:16,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-07 09:40:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2019-09-07 09:40:16,573 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 59 states. [2019-09-07 09:40:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:40:16,804 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2019-09-07 09:40:16,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-07 09:40:16,805 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2019-09-07 09:40:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:40:16,806 INFO L225 Difference]: With dead ends: 203 [2019-09-07 09:40:16,806 INFO L226 Difference]: Without dead ends: 136 [2019-09-07 09:40:16,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2019-09-07 09:40:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-09-07 09:40:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-09-07 09:40:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-09-07 09:40:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2019-09-07 09:40:16,814 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2019-09-07 09:40:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:40:16,814 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2019-09-07 09:40:16,814 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-07 09:40:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2019-09-07 09:40:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-07 09:40:16,815 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:40:16,815 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:40:16,816 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:40:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:40:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2014566956, now seen corresponding path program 38 times [2019-09-07 09:40:16,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:40:16,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:40:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:16,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:40:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:40:17,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:40:17,336 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:40:17,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:40:17,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:40:17,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:40:17,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:40:17,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:40:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 09:40:18,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:40:18,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 61 [2019-09-07 09:40:18,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 09:40:18,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 09:40:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 09:40:18,094 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 61 states. [2019-09-07 09:40:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:40:18,396 INFO L93 Difference]: Finished difference Result 209 states and 214 transitions. [2019-09-07 09:40:18,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 09:40:18,397 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 129 [2019-09-07 09:40:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:40:18,398 INFO L225 Difference]: With dead ends: 209 [2019-09-07 09:40:18,398 INFO L226 Difference]: Without dead ends: 140 [2019-09-07 09:40:18,399 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 09:40:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-07 09:40:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-09-07 09:40:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-07 09:40:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2019-09-07 09:40:18,404 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 129 [2019-09-07 09:40:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:40:18,404 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2019-09-07 09:40:18,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 09:40:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2019-09-07 09:40:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-07 09:40:18,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:40:18,406 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:40:18,406 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:40:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:40:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 191032144, now seen corresponding path program 39 times [2019-09-07 09:40:18,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:40:18,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:40:18,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:18,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:40:18,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:40:19,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:40:19,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:40:19,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:24,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 09:42:24,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:24,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-07 09:42:24,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 59 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:42:24,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:24,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 35 [2019-09-07 09:42:24,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 09:42:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 09:42:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:42:24,474 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 35 states. [2019-09-07 09:42:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:25,191 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2019-09-07 09:42:25,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 09:42:25,194 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-09-07 09:42:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:25,195 INFO L225 Difference]: With dead ends: 152 [2019-09-07 09:42:25,195 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 09:42:25,196 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1524, Invalid=2636, Unknown=0, NotChecked=0, Total=4160 [2019-09-07 09:42:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 09:42:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-09-07 09:42:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 09:42:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2019-09-07 09:42:25,201 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2019-09-07 09:42:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:25,201 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2019-09-07 09:42:25,201 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 09:42:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2019-09-07 09:42:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-07 09:42:25,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:25,202 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:25,202 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1071751506, now seen corresponding path program 40 times [2019-09-07 09:42:25,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:25,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:25,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:25,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:25,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:42:25,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:25,642 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:25,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:42:25,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:42:25,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:42:25,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 09:42:25,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:42:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:42:25,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:42:25,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-07 09:42:25,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 09:42:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 09:42:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 09:42:25,772 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 34 states. [2019-09-07 09:42:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:42:25,896 INFO L93 Difference]: Finished difference Result 216 states and 220 transitions. [2019-09-07 09:42:25,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:42:25,897 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 135 [2019-09-07 09:42:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:42:25,898 INFO L225 Difference]: With dead ends: 216 [2019-09-07 09:42:25,898 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 09:42:25,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 09:42:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 09:42:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-09-07 09:42:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 09:42:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2019-09-07 09:42:25,909 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2019-09-07 09:42:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:42:25,910 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2019-09-07 09:42:25,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 09:42:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2019-09-07 09:42:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:42:25,911 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:42:25,911 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:42:25,912 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:42:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:42:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash -449084724, now seen corresponding path program 41 times [2019-09-07 09:42:25,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:42:25,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:42:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:25,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:42:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:42:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:42:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-09-07 09:42:26,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:42:26,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:42:26,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1