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/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:15:42,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:15:42,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:15:42,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 11:15:42,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:15:42,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:15:42,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:15:42,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:15:42,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:15:42,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:15:42,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:15:42,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:15:42,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:15:42,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:15:42,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:15:42,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:15:42,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:15:42,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:15:42,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:15:42,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:15:42,459 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 11:15:42,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:15:42,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:15:42,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:15:42,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:15:42,475 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:15:42,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:15:42,475 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:15:42,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:15:42,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:15:42,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:15:42,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:15:42,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:15:42,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:15:42,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:15:42,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:15:42,477 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:15:42,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:15:42,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:15:42,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:15:42,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:15:42,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:15:42,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:15:42,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:15:42,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:15:42,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:15:42,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:15:42,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:15:42,525 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:15:42,525 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:15:42,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-09-07 11:15:42,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b77f333/f0dea2f29edd42b0b5dc7da69bf25593/FLAGd12c6ac78 [2019-09-07 11:15:43,009 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:15:43,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-09-07 11:15:43,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b77f333/f0dea2f29edd42b0b5dc7da69bf25593/FLAGd12c6ac78 [2019-09-07 11:15:43,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b77f333/f0dea2f29edd42b0b5dc7da69bf25593 [2019-09-07 11:15:43,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:15:43,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:15:43,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:15:43,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:15:43,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:15:43,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19027eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43, skipping insertion in model container [2019-09-07 11:15:43,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,468 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:15:43,489 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:15:43,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:15:43,710 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:15:43,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:15:43,748 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:15:43,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43 WrapperNode [2019-09-07 11:15:43,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:15:43,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:15:43,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:15:43,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:15:43,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (1/1) ... [2019-09-07 11:15:43,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:15:43,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:15:43,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:15:43,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:15:43,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (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 11:15:43,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:15:43,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:15:43,948 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-09-07 11:15:43,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:15:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:15:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:15:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-09-07 11:15:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:15:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:15:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:15:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:15:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:15:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:15:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:15:44,207 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:15:44,207 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:15:44,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:15:44 BoogieIcfgContainer [2019-09-07 11:15:44,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:15:44,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:15:44,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:15:44,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:15:44,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:15:43" (1/3) ... [2019-09-07 11:15:44,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d7fe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:15:44, skipping insertion in model container [2019-09-07 11:15:44,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:15:43" (2/3) ... [2019-09-07 11:15:44,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d7fe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:15:44, skipping insertion in model container [2019-09-07 11:15:44,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:15:44" (3/3) ... [2019-09-07 11:15:44,219 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-09-07 11:15:44,234 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:15:44,250 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:15:44,269 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:15:44,308 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:15:44,309 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:15:44,309 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:15:44,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:15:44,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:15:44,310 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:15:44,310 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:15:44,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:15:44,310 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:15:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 11:15:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:15:44,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:44,341 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:44,343 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-09-07 11:15:44,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:44,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:44,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:44,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:15:44,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:15:44,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:15:44,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:15:44,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:15:44,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:15:44,523 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-07 11:15:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:44,546 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-09-07 11:15:44,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:15:44,548 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 11:15:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:44,557 INFO L225 Difference]: With dead ends: 56 [2019-09-07 11:15:44,557 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 11:15:44,561 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 11:15:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 11:15:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-07 11:15:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:15:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-07 11:15:44,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-09-07 11:15:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:44,603 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-07 11:15:44,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:15:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-07 11:15:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:15:44,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:44,608 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:44,608 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-09-07 11:15:44,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:44,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:44,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:44,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:15:44,682 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:15:44,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:15:44,684 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:15:44,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:15:44,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:15:44,685 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-07 11:15:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:44,721 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-07 11:15:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:15:44,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 11:15:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:44,724 INFO L225 Difference]: With dead ends: 48 [2019-09-07 11:15:44,724 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 11:15:44,725 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 11:15:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 11:15:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 11:15:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 11:15:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-07 11:15:44,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-09-07 11:15:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:44,734 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-07 11:15:44,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:15:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-07 11:15:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 11:15:44,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:44,736 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:44,736 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-09-07 11:15:44,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:44,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:44,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:44,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 11:15:44,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:44,841 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 11:15:44,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:44,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:15:44,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:15:44,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:15:44,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:15:44,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:15:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:15:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:15:44,972 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-07 11:15:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:45,009 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-09-07 11:15:45,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:15:45,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 11:15:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:45,011 INFO L225 Difference]: With dead ends: 49 [2019-09-07 11:15:45,011 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 11:15:45,012 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:15:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 11:15:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-07 11:15:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 11:15:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-07 11:15:45,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-09-07 11:15:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:45,028 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-07 11:15:45,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:15:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-07 11:15:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 11:15:45,033 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:45,033 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:45,034 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-09-07 11:15:45,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:45,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:45,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:45,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:15:45,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:15:45,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:15:45,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:15:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:15:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:15:45,142 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-09-07 11:15:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:45,167 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-09-07 11:15:45,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:15:45,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-09-07 11:15:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:45,169 INFO L225 Difference]: With dead ends: 45 [2019-09-07 11:15:45,169 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 11:15:45,170 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 11:15:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 11:15:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-07 11:15:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 11:15:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-07 11:15:45,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-09-07 11:15:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:45,188 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-07 11:15:45,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:15:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-07 11:15:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 11:15:45,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:45,194 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:45,195 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:45,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-09-07 11:15:45,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:45,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:45,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:45,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:15:45,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:45,292 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:45,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:45,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:15:45,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Stream closed [2019-09-07 11:15:45,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:45,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 11:15:45,381 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:15:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:15:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:15:45,382 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-09-07 11:15:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:45,409 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-09-07 11:15:45,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:15:45,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-09-07 11:15:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:45,411 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:15:45,411 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 11:15:45,412 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 11:15:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 11:15:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-07 11:15:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 11:15:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-09-07 11:15:45,418 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-09-07 11:15:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:45,419 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-09-07 11:15:45,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:15:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-09-07 11:15:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 11:15:45,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:45,420 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:45,421 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-09-07 11:15:45,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:45,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-09-07 11:15:45,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:45,521 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:45,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:15:45,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:15:45,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:45,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:15:45,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:15:45,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:45,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 11:15:45,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:15:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:15:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:15:45,628 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-09-07 11:15:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:45,699 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-09-07 11:15:45,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:15:45,702 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-09-07 11:15:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:45,705 INFO L225 Difference]: With dead ends: 61 [2019-09-07 11:15:45,706 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 11:15:45,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 11:15:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 11:15:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-07 11:15:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 11:15:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-09-07 11:15:45,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 47 [2019-09-07 11:15:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:45,723 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-09-07 11:15:45,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:15:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-09-07 11:15:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-07 11:15:45,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:45,726 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:45,727 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1057089466, now seen corresponding path program 3 times [2019-09-07 11:15:45,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:45,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:45,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:45,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-09-07 11:15:45,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:45,872 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 11:15:45,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:45,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 11:15:45,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:45,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:15:45,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 11:15:45,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:45,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-07 11:15:45,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:15:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:15:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:15:45,972 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2019-09-07 11:15:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:46,032 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-09-07 11:15:46,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:15:46,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2019-09-07 11:15:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:46,034 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:15:46,034 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:15:46,035 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:15:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:15:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-07 11:15:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 11:15:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-07 11:15:46,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 58 [2019-09-07 11:15:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:46,043 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-07 11:15:46,043 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:15:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-07 11:15:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 11:15:46,044 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:46,044 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:46,045 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash -515095459, now seen corresponding path program 4 times [2019-09-07 11:15:46,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:46,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:46,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-09-07 11:15:46,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:46,151 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 11:15:46,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:46,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:15:46,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:46,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:15:46,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 11:15:46,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:46,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-07 11:15:46,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:15:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:15:46,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:15:46,298 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2019-09-07 11:15:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:46,376 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-09-07 11:15:46,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:15:46,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2019-09-07 11:15:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:46,379 INFO L225 Difference]: With dead ends: 79 [2019-09-07 11:15:46,379 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 11:15:46,380 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:15:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 11:15:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-09-07 11:15:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 11:15:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-09-07 11:15:46,393 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 69 [2019-09-07 11:15:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:46,394 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-09-07 11:15:46,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:15:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-09-07 11:15:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 11:15:46,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:46,398 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:46,398 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1632310970, now seen corresponding path program 5 times [2019-09-07 11:15:46,399 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:46,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:46,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:46,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-09-07 11:15:46,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:46,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:15:46,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:46,677 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 11:15:46,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:46,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:15:46,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-09-07 11:15:46,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:46,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 11:15:46,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:15:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:15:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:15:46,707 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2019-09-07 11:15:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:46,729 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-09-07 11:15:46,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:15:46,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2019-09-07 11:15:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:46,730 INFO L225 Difference]: With dead ends: 73 [2019-09-07 11:15:46,730 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 11:15:46,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 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 11:15:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 11:15:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-09-07 11:15:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-07 11:15:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-09-07 11:15:46,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 80 [2019-09-07 11:15:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:46,738 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-09-07 11:15:46,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:15:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-09-07 11:15:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-07 11:15:46,739 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:46,739 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:46,740 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -144412808, now seen corresponding path program 6 times [2019-09-07 11:15:46,740 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:46,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:46,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:46,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-09-07 11:15:46,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:46,864 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:15:46,888 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:46,979 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-07 11:15:46,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:46,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:15:46,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-09-07 11:15:47,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:47,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 11:15:47,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:15:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:15:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:47,067 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2019-09-07 11:15:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:47,135 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2019-09-07 11:15:47,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:15:47,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-09-07 11:15:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:47,136 INFO L225 Difference]: With dead ends: 91 [2019-09-07 11:15:47,136 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 11:15:47,137 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 11:15:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-09-07 11:15:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 11:15:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-09-07 11:15:47,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2019-09-07 11:15:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:47,144 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-09-07 11:15:47,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:15:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-09-07 11:15:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 11:15:47,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:47,145 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:47,146 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:47,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash -513954565, now seen corresponding path program 7 times [2019-09-07 11:15:47,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:47,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 11:15:47,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:47,225 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 11:15:47,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:47,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:15:47,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Stream Closed [2019-09-07 11:15:47,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:47,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 11:15:47,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:15:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:15:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:47,391 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 12 states. [2019-09-07 11:15:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:47,460 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2019-09-07 11:15:47,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:15:47,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2019-09-07 11:15:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:47,462 INFO L225 Difference]: With dead ends: 97 [2019-09-07 11:15:47,463 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 11:15:47,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 11:15:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-09-07 11:15:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 11:15:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2019-09-07 11:15:47,471 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 93 [2019-09-07 11:15:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:47,471 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2019-09-07 11:15:47,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:15:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2019-09-07 11:15:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 11:15:47,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:47,473 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:47,473 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2094467301, now seen corresponding path program 8 times [2019-09-07 11:15:47,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:47,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:47,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:47,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-09-07 11:15:47,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:47,605 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 11:15:47,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:47,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:15:47,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:47,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:15:47,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-09-07 11:15:47,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:47,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 11:15:47,822 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 11:15:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 11:15:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:15:47,823 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 15 states. [2019-09-07 11:15:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:47,906 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2019-09-07 11:15:47,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 11:15:47,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2019-09-07 11:15:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:47,908 INFO L225 Difference]: With dead ends: 105 [2019-09-07 11:15:47,908 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 11:15:47,909 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 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 11:15:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 11:15:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-09-07 11:15:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 11:15:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-09-07 11:15:47,923 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 97 [2019-09-07 11:15:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:47,923 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-09-07 11:15:47,923 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 11:15:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-09-07 11:15:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 11:15:47,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:47,924 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:47,925 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash -127140932, now seen corresponding path program 9 times [2019-09-07 11:15:47,925 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:47,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:47,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:47,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2019-09-07 11:15:48,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:48,056 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 11:15:48,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:15:48,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 11:15:48,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:48,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:15:48,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-09-07 11:15:48,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:48,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 11:15:48,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:15:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:15:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:15:48,213 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2019-09-07 11:15:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:48,248 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2019-09-07 11:15:48,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:15:48,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2019-09-07 11:15:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:48,250 INFO L225 Difference]: With dead ends: 95 [2019-09-07 11:15:48,250 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 11:15:48,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:15:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 11:15:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-09-07 11:15:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-07 11:15:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2019-09-07 11:15:48,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 108 [2019-09-07 11:15:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:48,268 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2019-09-07 11:15:48,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:15:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2019-09-07 11:15:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-07 11:15:48,269 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:48,269 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:48,269 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2143419770, now seen corresponding path program 10 times [2019-09-07 11:15:48,270 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:48,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:48,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:48,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:48,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-09-07 11:15:48,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:48,401 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:15:48,425 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:48,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:15:48,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:48,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:15:48,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-09-07 11:15:48,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:48,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 11:15:48,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:15:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:15:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:15:48,562 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 10 states. [2019-09-07 11:15:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:48,598 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2019-09-07 11:15:48,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 11:15:48,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-09-07 11:15:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:48,601 INFO L225 Difference]: With dead ends: 113 [2019-09-07 11:15:48,602 INFO L226 Difference]: Without dead ends: 70 [2019-09-07 11:15:48,602 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 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 11:15:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-07 11:15:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-07 11:15:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 11:15:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2019-09-07 11:15:48,614 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 110 [2019-09-07 11:15:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:48,614 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2019-09-07 11:15:48,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:15:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2019-09-07 11:15:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 11:15:48,616 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:48,617 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:48,617 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2132592357, now seen corresponding path program 11 times [2019-09-07 11:15:48,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:48,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:48,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:48,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2019-09-07 11:15:48,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:48,765 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 11:15:48,793 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:49,200 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 11:15:49,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:49,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:15:49,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 326 proven. 70 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-09-07 11:15:49,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:49,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2019-09-07 11:15:49,355 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:15:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:15:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:15:49,356 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 16 states. [2019-09-07 11:15:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:49,432 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2019-09-07 11:15:49,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:15:49,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 119 [2019-09-07 11:15:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:49,434 INFO L225 Difference]: With dead ends: 122 [2019-09-07 11:15:49,434 INFO L226 Difference]: Without dead ends: 76 [2019-09-07 11:15:49,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:15:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-07 11:15:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-09-07 11:15:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-07 11:15:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2019-09-07 11:15:49,441 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 119 [2019-09-07 11:15:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:49,441 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2019-09-07 11:15:49,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:15:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2019-09-07 11:15:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 11:15:49,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:49,443 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:49,443 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash 790795096, now seen corresponding path program 12 times [2019-09-07 11:15:49,444 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:49,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:49,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:49,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:49,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-09-07 11:15:49,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:49,575 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 11:15:49,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:15:49,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 11:15:49,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:49,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:15:49,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 426 proven. 36 refuted. 0 times theorem prover too weak. 538 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 11:15:50,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:50,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-09-07 11:15:50,027 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 11:15:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 11:15:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 11:15:50,030 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 17 states. [2019-09-07 11:15:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:50,139 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2019-09-07 11:15:50,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 11:15:50,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 130 [2019-09-07 11:15:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:50,141 INFO L225 Difference]: With dead ends: 131 [2019-09-07 11:15:50,141 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 11:15:50,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 11:15:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 11:15:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-09-07 11:15:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-07 11:15:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2019-09-07 11:15:50,155 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 130 [2019-09-07 11:15:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:50,156 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2019-09-07 11:15:50,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 11:15:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2019-09-07 11:15:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-07 11:15:50,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:50,158 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:50,159 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1217936840, now seen corresponding path program 13 times [2019-09-07 11:15:50,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:50,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:50,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:50,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2019-09-07 11:15:50,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:50,376 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 11:15:50,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:50,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:15:50,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2019-09-07 11:15:50,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:50,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 11:15:50,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:15:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:15:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:50,529 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 12 states. [2019-09-07 11:15:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:50,572 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2019-09-07 11:15:50,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:15:50,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2019-09-07 11:15:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:50,574 INFO L225 Difference]: With dead ends: 134 [2019-09-07 11:15:50,574 INFO L226 Difference]: Without dead ends: 80 [2019-09-07 11:15:50,575 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-07 11:15:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-09-07 11:15:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 11:15:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2019-09-07 11:15:50,584 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 134 [2019-09-07 11:15:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:50,584 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2019-09-07 11:15:50,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:15:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2019-09-07 11:15:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-07 11:15:50,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:50,586 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:50,586 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1272808538, now seen corresponding path program 14 times [2019-09-07 11:15:50,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:50,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:50,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 11:15:50,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:50,759 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 11:15:50,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:15:50,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:15:50,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:50,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:15:50,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2019-09-07 11:15:50,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:51,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 11:15:51,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 11:15:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 11:15:51,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:15:51,003 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 21 states. [2019-09-07 11:15:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:51,088 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2019-09-07 11:15:51,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 11:15:51,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2019-09-07 11:15:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:51,089 INFO L225 Difference]: With dead ends: 140 [2019-09-07 11:15:51,090 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 11:15:51,090 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:15:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 11:15:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-09-07 11:15:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-07 11:15:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2019-09-07 11:15:51,095 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 136 [2019-09-07 11:15:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:51,095 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2019-09-07 11:15:51,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 11:15:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2019-09-07 11:15:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-07 11:15:51,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:51,097 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:51,097 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1400312281, now seen corresponding path program 15 times [2019-09-07 11:15:51,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:51,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1249 trivial. 0 not checked. [2019-09-07 11:15:51,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:51,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:51,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:15:51,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 11:15:51,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:51,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:15:51,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 532 proven. 49 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-09-07 11:15:51,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:51,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 11:15:51,479 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:15:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:15:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:15:51,480 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 11 states. [2019-09-07 11:15:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:51,509 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2019-09-07 11:15:51,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:15:51,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 147 [2019-09-07 11:15:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:51,511 INFO L225 Difference]: With dead ends: 125 [2019-09-07 11:15:51,511 INFO L226 Difference]: Without dead ends: 87 [2019-09-07 11:15:51,512 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 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 11:15:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-07 11:15:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-09-07 11:15:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 11:15:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2019-09-07 11:15:51,517 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 147 [2019-09-07 11:15:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:51,517 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2019-09-07 11:15:51,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:15:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2019-09-07 11:15:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-07 11:15:51,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:51,519 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:51,520 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1853120165, now seen corresponding path program 16 times [2019-09-07 11:15:51,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:51,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:51,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:51,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-09-07 11:15:51,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:51,683 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 11:15:51,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:15:51,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:15:51,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:51,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:15:51,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 526 proven. 117 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-09-07 11:15:51,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:51,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 11:15:51,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 11:15:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 11:15:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:15:51,825 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 13 states. [2019-09-07 11:15:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:51,870 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2019-09-07 11:15:51,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:15:51,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2019-09-07 11:15:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:51,872 INFO L225 Difference]: With dead ends: 147 [2019-09-07 11:15:51,872 INFO L226 Difference]: Without dead ends: 89 [2019-09-07 11:15:51,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:15:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-07 11:15:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-07 11:15:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 11:15:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2019-09-07 11:15:51,878 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 149 [2019-09-07 11:15:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:51,879 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2019-09-07 11:15:51,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 11:15:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2019-09-07 11:15:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-07 11:15:51,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:51,880 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:51,881 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1589640614, now seen corresponding path program 17 times [2019-09-07 11:15:51,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:51,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:51,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:51,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-09-07 11:15:52,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:52,029 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) [2019-09-07 11:15:52,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:15:52,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-09-07 11:15:52,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:52,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:15:52,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 650 proven. 64 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:15:52,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:52,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 11:15:52,805 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:15:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:15:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:52,805 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 12 states. [2019-09-07 11:15:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:52,845 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2019-09-07 11:15:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:15:52,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 158 [2019-09-07 11:15:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:52,846 INFO L225 Difference]: With dead ends: 132 [2019-09-07 11:15:52,846 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 11:15:52,847 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:15:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 11:15:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-07 11:15:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-07 11:15:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2019-09-07 11:15:52,851 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 158 [2019-09-07 11:15:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:52,852 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2019-09-07 11:15:52,852 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:15:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2019-09-07 11:15:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-07 11:15:52,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:52,853 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:52,853 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1889351576, now seen corresponding path program 18 times [2019-09-07 11:15:52,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:52,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:52,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:52,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:52,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-09-07 11:15:53,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:53,680 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 11:15:53,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:15:54,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-07 11:15:54,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:15:54,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-07 11:15:54,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:54,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 11:15:54,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 11:15:54,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 11:15:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 19 proven. 1305 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:15:54,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:54,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 24 [2019-09-07 11:15:54,820 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 11:15:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 11:15:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2019-09-07 11:15:54,821 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 24 states. [2019-09-07 11:15:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:15:55,774 INFO L93 Difference]: Finished difference Result 297 states and 414 transitions. [2019-09-07 11:15:55,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:15:55,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2019-09-07 11:15:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:15:55,783 INFO L225 Difference]: With dead ends: 297 [2019-09-07 11:15:55,783 INFO L226 Difference]: Without dead ends: 293 [2019-09-07 11:15:55,784 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:15:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-09-07 11:15:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 233. [2019-09-07 11:15:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-09-07 11:15:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2019-09-07 11:15:55,830 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 160 [2019-09-07 11:15:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:15:55,830 INFO L475 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2019-09-07 11:15:55,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 11:15:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2019-09-07 11:15:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-07 11:15:55,834 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:15:55,834 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:15:55,834 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:15:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:15:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1725557350, now seen corresponding path program 1 times [2019-09-07 11:15:55,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:15:55,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:15:55,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:55,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:15:55,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:15:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 648 proven. 504 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 11:15:57,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:15:57,307 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 11:15:57,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:15:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:15:57,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-07 11:15:57,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:15:57,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-07 11:15:57,475 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-09-07 11:15:57,476 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,481 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 11:15:57,481 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,482 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-09-07 11:15:57,624 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-09-07 11:15:57,625 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,629 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 11:15:57,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,630 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-09-07 11:15:57,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-09-07 11:15:57,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,655 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 11:15:57,656 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 11:15:57,657 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-09-07 11:15:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:15:58,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:15:58,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 42 [2019-09-07 11:15:58,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 11:15:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 11:15:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 11:15:58,502 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand 42 states. [2019-09-07 11:16:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:03,461 INFO L93 Difference]: Finished difference Result 675 states and 885 transitions. [2019-09-07 11:16:03,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-07 11:16:03,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 160 [2019-09-07 11:16:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:03,465 INFO L225 Difference]: With dead ends: 675 [2019-09-07 11:16:03,465 INFO L226 Difference]: Without dead ends: 599 [2019-09-07 11:16:03,468 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1059, Invalid=6773, Unknown=0, NotChecked=0, Total=7832 [2019-09-07 11:16:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-09-07 11:16:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 460. [2019-09-07 11:16:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-09-07 11:16:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 594 transitions. [2019-09-07 11:16:03,506 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 594 transitions. Word has length 160 [2019-09-07 11:16:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:03,507 INFO L475 AbstractCegarLoop]: Abstraction has 460 states and 594 transitions. [2019-09-07 11:16:03,507 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 11:16:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 594 transitions. [2019-09-07 11:16:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-07 11:16:03,510 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:03,510 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:16:03,510 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:03,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2147450282, now seen corresponding path program 2 times [2019-09-07 11:16:03,511 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:03,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:03,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:03,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:03,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 546 proven. 454 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-09-07 11:16:06,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:06,877 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:06,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:16:07,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:07,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:07,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-07 11:16:07,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:07,074 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-09-07 11:16:07,074 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 11:16:07,080 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 11:16:07,081 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 11:16:07,081 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:3 [2019-09-07 11:16:07,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:07,835 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:146) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-07 11:16:07,841 INFO L168 Benchmark]: Toolchain (without parser) took 24390.35 ms. Allocated memory was 137.4 MB in the beginning and 543.2 MB in the end (delta: 405.8 MB). Free memory was 85.1 MB in the beginning and 480.1 MB in the end (delta: -395.0 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,842 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 103.4 MB in the beginning and 103.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.70 ms. Allocated memory is still 137.4 MB. Free memory was 84.9 MB in the beginning and 74.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,844 INFO L168 Benchmark]: Boogie Preprocessor took 138.02 ms. Allocated memory was 137.4 MB in the beginning and 197.7 MB in the end (delta: 60.3 MB). Free memory was 74.6 MB in the beginning and 174.2 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,844 INFO L168 Benchmark]: RCFGBuilder took 322.76 ms. Allocated memory is still 197.7 MB. Free memory was 174.2 MB in the beginning and 157.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,853 INFO L168 Benchmark]: TraceAbstraction took 23628.31 ms. Allocated memory was 197.7 MB in the beginning and 543.2 MB in the end (delta: 345.5 MB). Free memory was 157.6 MB in the beginning and 480.1 MB in the end (delta: -322.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2019-09-07 11:16:07,859 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 103.4 MB in the beginning and 103.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.70 ms. Allocated memory is still 137.4 MB. Free memory was 84.9 MB in the beginning and 74.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.02 ms. Allocated memory was 137.4 MB in the beginning and 197.7 MB in the end (delta: 60.3 MB). Free memory was 74.6 MB in the beginning and 174.2 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 322.76 ms. Allocated memory is still 197.7 MB. Free memory was 174.2 MB in the beginning and 157.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23628.31 ms. Allocated memory was 197.7 MB in the beginning and 543.2 MB in the end (delta: 345.5 MB). Free memory was 157.6 MB in the beginning and 480.1 MB in the end (delta: -322.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...