java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/eureka_05_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:23,495 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:23,499 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:23,516 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:23,516 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:23,518 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:23,520 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:23,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:23,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:23,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:23,525 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:23,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:23,526 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:23,527 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:23,528 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:23,529 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:23,530 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:23,532 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:23,534 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:23,535 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:23,536 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:23,537 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:23,539 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:23,548 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:36:23,562 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:23,562 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:23,563 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:23,563 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:23,564 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:23,564 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:23,564 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:23,565 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:23,565 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:23,565 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:23,565 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:23,565 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:23,566 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:23,566 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:23,566 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:23,566 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:23,566 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:23,567 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:23,567 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:23,567 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:23,567 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:23,567 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:23,570 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:23,570 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:23,570 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:23,570 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:23,571 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:23,571 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:23,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:23,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:23,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:23,648 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:23,648 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:23,651 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/eureka_05_true-unreach-call_true-termination.i [2018-10-22 15:36:23,715 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8340b2d41/a671e668de584b18a0bce1daec40dfd0/FLAG7c9fe06f6 [2018-10-22 15:36:24,143 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:24,144 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05_true-unreach-call_true-termination.i [2018-10-22 15:36:24,149 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8340b2d41/a671e668de584b18a0bce1daec40dfd0/FLAG7c9fe06f6 [2018-10-22 15:36:24,165 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8340b2d41/a671e668de584b18a0bce1daec40dfd0 [2018-10-22 15:36:24,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:24,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:24,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:24,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:24,182 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:24,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748b0069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24, skipping insertion in model container [2018-10-22 15:36:24,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:24,219 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:24,428 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:24,438 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:24,471 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:24,500 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:24,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24 WrapperNode [2018-10-22 15:36:24,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:24,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:24,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:24,501 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:24,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:24,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:24,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:24,545 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:24,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... [2018-10-22 15:36:24,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:24,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:24,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:24,591 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:24,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:24,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-22 15:36:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-22 15:36:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:24,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-22 15:36:24,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-10-22 15:36:25,241 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:25,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:25 BoogieIcfgContainer [2018-10-22 15:36:25,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:25,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:25,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:25,246 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:25,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:24" (1/3) ... [2018-10-22 15:36:25,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2410916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:25, skipping insertion in model container [2018-10-22 15:36:25,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:24" (2/3) ... [2018-10-22 15:36:25,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2410916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:25, skipping insertion in model container [2018-10-22 15:36:25,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:25" (3/3) ... [2018-10-22 15:36:25,250 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05_true-unreach-call_true-termination.i [2018-10-22 15:36:25,261 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:25,270 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:25,287 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:25,322 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:25,323 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:25,323 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:25,323 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:25,324 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:25,324 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:25,324 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:25,324 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:25,324 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-10-22 15:36:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:36:25,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:25,353 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:25,355 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:25,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -794186159, now seen corresponding path program 1 times [2018-10-22 15:36:25,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:25,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:25,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:25,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:25,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:25,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:25,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:25,534 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2018-10-22 15:36:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:25,554 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2018-10-22 15:36:25,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:25,556 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-10-22 15:36:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:25,567 INFO L225 Difference]: With dead ends: 75 [2018-10-22 15:36:25,567 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:36:25,571 INFO L605 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 [2018-10-22 15:36:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:36:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-22 15:36:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:36:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-10-22 15:36:25,606 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 21 [2018-10-22 15:36:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:25,607 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-10-22 15:36:25,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-10-22 15:36:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:36:25,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:25,609 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:25,609 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:25,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash -593923913, now seen corresponding path program 1 times [2018-10-22 15:36:25,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:25,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:25,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:25,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:25,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:25,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:36:25,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:36:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:36:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:36:25,676 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 3 states. [2018-10-22 15:36:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:25,777 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2018-10-22 15:36:25,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:36:25,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-10-22 15:36:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:25,779 INFO L225 Difference]: With dead ends: 71 [2018-10-22 15:36:25,779 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:36:25,780 INFO L605 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 [2018-10-22 15:36:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:36:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-10-22 15:36:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:36:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-10-22 15:36:25,787 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 23 [2018-10-22 15:36:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:25,787 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-10-22 15:36:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:36:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-10-22 15:36:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:36:25,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:25,789 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:25,789 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:25,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash 496444158, now seen corresponding path program 1 times [2018-10-22 15:36:25,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:25,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:25,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:25,991 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:26,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:26,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:26,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:26,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:36:26,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:26,128 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2018-10-22 15:36:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:26,349 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-10-22 15:36:26,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:26,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-10-22 15:36:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:26,351 INFO L225 Difference]: With dead ends: 75 [2018-10-22 15:36:26,351 INFO L226 Difference]: Without dead ends: 49 [2018-10-22 15:36:26,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-22 15:36:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-10-22 15:36:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:36:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-10-22 15:36:26,358 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 27 [2018-10-22 15:36:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:26,359 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-10-22 15:36:26,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-10-22 15:36:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:36:26,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:26,361 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:26,361 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:26,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1750358469, now seen corresponding path program 2 times [2018-10-22 15:36:26,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:26,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:26,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:26,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:26,476 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:26,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:26,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-22 15:36:26,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:26,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-22 15:36:26,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:36:26,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-22 15:36:26,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:26,804 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2018-10-22 15:36:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:27,139 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2018-10-22 15:36:27,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:27,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-10-22 15:36:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:27,142 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:36:27,142 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:36:27,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:36:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:36:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2018-10-22 15:36:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:36:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-22 15:36:27,151 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 31 [2018-10-22 15:36:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:27,152 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-22 15:36:27,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-22 15:36:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:36:27,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:27,154 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:27,154 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:27,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2127477742, now seen corresponding path program 1 times [2018-10-22 15:36:27,155 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:27,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:27,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:27,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:27,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:27,257 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:27,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:27,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:27,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:36:27,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:36:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:36:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:27,345 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 6 states. [2018-10-22 15:36:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:27,490 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2018-10-22 15:36:27,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:36:27,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2018-10-22 15:36:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:27,494 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:36:27,494 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:36:27,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:36:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2018-10-22 15:36:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-22 15:36:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2018-10-22 15:36:27,510 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 46 [2018-10-22 15:36:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:27,511 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2018-10-22 15:36:27,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:36:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2018-10-22 15:36:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:36:27,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:27,517 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:27,518 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:27,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1834611179, now seen corresponding path program 2 times [2018-10-22 15:36:27,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:27,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:27,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:27,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:27,817 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:27,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:27,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:27,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:27,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:27,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:36:27,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:27,919 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2018-10-22 15:36:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:28,252 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2018-10-22 15:36:28,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:28,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2018-10-22 15:36:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:28,255 INFO L225 Difference]: With dead ends: 125 [2018-10-22 15:36:28,255 INFO L226 Difference]: Without dead ends: 97 [2018-10-22 15:36:28,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-22 15:36:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2018-10-22 15:36:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-22 15:36:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2018-10-22 15:36:28,264 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 50 [2018-10-22 15:36:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:28,264 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2018-10-22 15:36:28,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2018-10-22 15:36:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-22 15:36:28,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:28,266 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:28,266 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:28,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1755968700, now seen corresponding path program 3 times [2018-10-22 15:36:28,267 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:28,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:28,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:28,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-22 15:36:28,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:28,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:36:28,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:36:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:36:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:28,506 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 5 states. [2018-10-22 15:36:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:28,675 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2018-10-22 15:36:28,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:28,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2018-10-22 15:36:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:28,677 INFO L225 Difference]: With dead ends: 105 [2018-10-22 15:36:28,677 INFO L226 Difference]: Without dead ends: 80 [2018-10-22 15:36:28,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-22 15:36:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2018-10-22 15:36:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 15:36:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2018-10-22 15:36:28,688 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2018-10-22 15:36:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:28,688 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2018-10-22 15:36:28,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:36:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2018-10-22 15:36:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-22 15:36:28,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:28,690 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:28,691 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:28,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1400751282, now seen corresponding path program 1 times [2018-10-22 15:36:28,691 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:28,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:28,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:28,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-22 15:36:28,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:28,874 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:28,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:28,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-22 15:36:29,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:29,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2018-10-22 15:36:29,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:29,195 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 9 states. [2018-10-22 15:36:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:29,501 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2018-10-22 15:36:29,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:36:29,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2018-10-22 15:36:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:29,504 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:36:29,504 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:36:29,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:36:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:36:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-22 15:36:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:36:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2018-10-22 15:36:29,515 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 60 [2018-10-22 15:36:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:29,516 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2018-10-22 15:36:29,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2018-10-22 15:36:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:36:29,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:29,518 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:29,518 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:29,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -77800680, now seen corresponding path program 2 times [2018-10-22 15:36:29,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:29,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:29,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:29,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-22 15:36:29,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:29,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:36:29,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:36:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:36:29,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:29,682 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 5 states. [2018-10-22 15:36:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:29,764 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2018-10-22 15:36:29,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:29,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2018-10-22 15:36:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:29,766 INFO L225 Difference]: With dead ends: 146 [2018-10-22 15:36:29,766 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:36:29,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:36:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2018-10-22 15:36:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-22 15:36:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2018-10-22 15:36:29,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 88 [2018-10-22 15:36:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:29,778 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2018-10-22 15:36:29,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:36:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2018-10-22 15:36:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:36:29,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:29,780 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-22 15:36:29,780 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:29,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash 916290126, now seen corresponding path program 3 times [2018-10-22 15:36:29,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:29,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-22 15:36:29,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:29,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:29,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:36:30,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:36:30,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:30,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-22 15:36:30,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:30,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-10-22 15:36:30,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:36:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:36:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:30,233 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand 11 states. [2018-10-22 15:36:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:30,485 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2018-10-22 15:36:30,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:30,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2018-10-22 15:36:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:30,489 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:36:30,489 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:36:30,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:36:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-22 15:36:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 15:36:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2018-10-22 15:36:30,511 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 94 [2018-10-22 15:36:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:30,512 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2018-10-22 15:36:30,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:36:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2018-10-22 15:36:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:36:30,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:30,514 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-10-22 15:36:30,514 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:30,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 907761752, now seen corresponding path program 4 times [2018-10-22 15:36:30,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:30,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 46 proven. 44 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-22 15:36:31,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:31,347 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:31,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:36:31,413 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:36:31,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:31,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-22 15:36:31,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:31,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2018-10-22 15:36:31,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:36:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:36:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:36:31,945 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 15 states. [2018-10-22 15:36:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:32,762 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2018-10-22 15:36:32,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:36:32,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-22 15:36:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:32,767 INFO L225 Difference]: With dead ends: 208 [2018-10-22 15:36:32,767 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:36:32,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:36:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:36:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2018-10-22 15:36:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-22 15:36:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2018-10-22 15:36:32,780 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 100 [2018-10-22 15:36:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:32,781 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2018-10-22 15:36:32,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:36:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2018-10-22 15:36:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-22 15:36:32,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:32,783 INFO L375 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:32,784 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:32,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash 712625138, now seen corresponding path program 5 times [2018-10-22 15:36:32,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:32,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:32,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:32,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:32,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 163 proven. 14 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-10-22 15:36:33,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:33,020 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:33,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:36:33,117 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:36:33,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:33,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:33,774 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-10-22 15:36:33,851 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 50 treesize of output 41 [2018-10-22 15:36:33,916 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,035 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,057 INFO L303 Elim1Store]: Index analysis took 204 ms [2018-10-22 15:36:34,094 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 122 [2018-10-22 15:36:34,105 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 5 xjuncts. [2018-10-22 15:36:34,356 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:36:34,446 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:36:34,447 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:102 [2018-10-22 15:36:34,596 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 57 treesize of output 50 [2018-10-22 15:36:34,633 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,634 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,638 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,658 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,664 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 97 [2018-10-22 15:36:34,665 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,684 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,788 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 36 [2018-10-22 15:36:34,831 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,832 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:34,833 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2018-10-22 15:36:34,834 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,852 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,894 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 27 treesize of output 24 [2018-10-22 15:36:34,908 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 [2018-10-22 15:36:34,909 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,914 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:34,948 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2018-10-22 15:36:34,948 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:126, output treesize:88 [2018-10-22 15:36:36,296 INFO L477 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 89 treesize of output 77 [2018-10-22 15:36:36,349 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,355 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,357 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,358 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,361 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,367 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,382 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,418 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 181 [2018-10-22 15:36:36,445 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 15 xjuncts. [2018-10-22 15:36:36,525 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,556 INFO L477 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 77 treesize of output 65 [2018-10-22 15:36:36,602 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,625 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,643 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,647 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,650 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,651 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,652 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 69 [2018-10-22 15:36:36,655 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,675 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,694 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:36:36,695 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:167, output treesize:28 [2018-10-22 15:36:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 192 proven. 71 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-22 15:36:36,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:36,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 28] total 32 [2018-10-22 15:36:36,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:36:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:36:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:36:36,887 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 32 states. [2018-10-22 15:36:40,711 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2018-10-22 15:36:41,084 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-10-22 15:36:41,462 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2018-10-22 15:36:41,769 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2018-10-22 15:36:42,108 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2018-10-22 15:36:42,393 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2018-10-22 15:36:42,686 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2018-10-22 15:36:43,014 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2018-10-22 15:36:43,287 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2018-10-22 15:36:43,509 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2018-10-22 15:36:46,396 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 46 [2018-10-22 15:36:47,389 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 50 [2018-10-22 15:36:47,591 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2018-10-22 15:36:47,773 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2018-10-22 15:36:48,241 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 50 [2018-10-22 15:36:48,442 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2018-10-22 15:36:48,904 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2018-10-22 15:36:49,370 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2018-10-22 15:36:49,782 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2018-10-22 15:36:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:50,180 INFO L93 Difference]: Finished difference Result 601 states and 682 transitions. [2018-10-22 15:36:50,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-22 15:36:50,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2018-10-22 15:36:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:50,186 INFO L225 Difference]: With dead ends: 601 [2018-10-22 15:36:50,186 INFO L226 Difference]: Without dead ends: 536 [2018-10-22 15:36:50,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5422 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2483, Invalid=14029, Unknown=0, NotChecked=0, Total=16512 [2018-10-22 15:36:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-10-22 15:36:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 309. [2018-10-22 15:36:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-22 15:36:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 356 transitions. [2018-10-22 15:36:50,227 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 356 transitions. Word has length 135 [2018-10-22 15:36:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:50,227 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 356 transitions. [2018-10-22 15:36:50,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:36:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 356 transitions. [2018-10-22 15:36:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-22 15:36:50,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:50,231 INFO L375 BasicCegarLoop]: trace histogram [14, 9, 9, 9, 9, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:50,231 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:50,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash 818812964, now seen corresponding path program 1 times [2018-10-22 15:36:50,232 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:50,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:50,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:50,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:50,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 307 proven. 30 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-10-22 15:36:50,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:50,384 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:50,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:50,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 212 proven. 74 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-10-22 15:36:50,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:50,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2018-10-22 15:36:50,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:36:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:36:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:36:50,655 INFO L87 Difference]: Start difference. First operand 309 states and 356 transitions. Second operand 15 states. [2018-10-22 15:36:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:51,374 INFO L93 Difference]: Finished difference Result 585 states and 688 transitions. [2018-10-22 15:36:51,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:36:51,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 152 [2018-10-22 15:36:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:51,377 INFO L225 Difference]: With dead ends: 585 [2018-10-22 15:36:51,377 INFO L226 Difference]: Without dead ends: 438 [2018-10-22 15:36:51,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:36:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-10-22 15:36:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 241. [2018-10-22 15:36:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-22 15:36:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2018-10-22 15:36:51,400 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 152 [2018-10-22 15:36:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:51,400 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2018-10-22 15:36:51,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:36:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2018-10-22 15:36:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-22 15:36:51,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:51,402 INFO L375 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:51,403 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:51,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -819722602, now seen corresponding path program 2 times [2018-10-22 15:36:51,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:51,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:51,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:51,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:51,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:52,297 WARN L179 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2018-10-22 15:36:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-10-22 15:36:52,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:52,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:36:52,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:52,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:52,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:52,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:53,458 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 49 treesize of output 40 [2018-10-22 15:36:53,462 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,463 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,468 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 55 [2018-10-22 15:36:53,469 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,475 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,488 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:60, output treesize:26 [2018-10-22 15:36:53,534 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 31 treesize of output 26 [2018-10-22 15:36:53,540 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,541 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,542 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2018-10-22 15:36:53,543 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,553 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,561 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2018-10-22 15:36:53,824 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 44 treesize of output 35 [2018-10-22 15:36:53,827 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:53,828 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,829 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,834 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 55 [2018-10-22 15:36:53,835 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,846 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,856 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,857 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:23 [2018-10-22 15:36:53,897 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 28 treesize of output 23 [2018-10-22 15:36:53,902 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,903 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,904 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 45 [2018-10-22 15:36:53,904 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,912 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,921 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,922 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2018-10-22 15:36:54,103 INFO L477 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 28 treesize of output 20 [2018-10-22 15:36:54,119 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:54,120 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-22 15:36:54,121 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,122 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,125 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2018-10-22 15:36:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 119 proven. 357 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-22 15:36:54,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:54,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 31] total 41 [2018-10-22 15:36:54,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:36:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:36:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:36:54,238 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand 41 states. [2018-10-22 15:36:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:58,598 INFO L93 Difference]: Finished difference Result 694 states and 812 transitions. [2018-10-22 15:36:58,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:36:58,599 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-22 15:36:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:58,603 INFO L225 Difference]: With dead ends: 694 [2018-10-22 15:36:58,603 INFO L226 Difference]: Without dead ends: 550 [2018-10-22 15:36:58,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=780, Invalid=6026, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:36:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2018-10-22 15:36:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 359. [2018-10-22 15:36:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-22 15:36:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 408 transitions. [2018-10-22 15:36:58,640 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 408 transitions. Word has length 158 [2018-10-22 15:36:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:58,641 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 408 transitions. [2018-10-22 15:36:58,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:36:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 408 transitions. [2018-10-22 15:36:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:36:58,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:58,643 INFO L375 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:58,643 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:58,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1790866580, now seen corresponding path program 1 times [2018-10-22 15:36:58,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:58,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:58,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:59,702 WARN L179 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2018-10-22 15:37:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2018-10-22 15:37:00,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:00,009 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:00,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:00,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:00,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2018-10-22 15:37:00,079 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,082 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-10-22 15:37:00,112 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:00,114 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:00,114 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:37:00,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,123 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,123 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2018-10-22 15:37:00,237 INFO L477 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 15 treesize of output 12 [2018-10-22 15:37:00,252 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:00,253 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,278 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,300 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2018-10-22 15:37:00,354 INFO L477 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 25 treesize of output 20 [2018-10-22 15:37:00,357 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:00,358 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:00,359 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 41 [2018-10-22 15:37:00,360 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,367 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,376 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:00,377 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2018-10-22 15:37:00,469 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:00,472 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:00,473 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,481 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:00,494 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:00,509 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:00,528 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:00,529 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,648 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,804 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:00,804 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:00,915 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:00,929 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:00,930 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,966 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:00,979 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,001 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,019 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,020 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,059 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:01,060 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,095 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,098 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,099 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,112 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,127 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:01,127 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,222 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,237 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,238 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,307 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:01,320 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,395 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,398 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,398 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,406 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:01,421 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,507 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,521 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,522 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:01,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:01,814 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:01,912 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:01,926 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:01,926 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:02,051 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:02,203 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:02,203 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:31 [2018-10-22 15:37:02,281 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2018-10-22 15:37:02,296 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:02,296 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:02,426 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:02,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:02,492 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:46, output treesize:27 [2018-10-22 15:37:02,992 INFO L477 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 26 treesize of output 20 [2018-10-22 15:37:03,004 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:03,006 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:37:03,008 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:03,008 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2018-10-22 15:37:03,009 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:03,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:03,028 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:03,029 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:7 [2018-10-22 15:37:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2018-10-22 15:37:03,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:03,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2018-10-22 15:37:03,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:37:03,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:37:03,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:37:03,272 INFO L87 Difference]: Start difference. First operand 359 states and 408 transitions. Second operand 31 states. [2018-10-22 15:37:04,870 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2018-10-22 15:37:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:06,606 INFO L93 Difference]: Finished difference Result 398 states and 447 transitions. [2018-10-22 15:37:06,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:37:06,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2018-10-22 15:37:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:06,610 INFO L225 Difference]: With dead ends: 398 [2018-10-22 15:37:06,610 INFO L226 Difference]: Without dead ends: 396 [2018-10-22 15:37:06,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=617, Invalid=2575, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:37:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2018-10-22 15:37:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 366. [2018-10-22 15:37:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-10-22 15:37:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 415 transitions. [2018-10-22 15:37:06,648 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 415 transitions. Word has length 165 [2018-10-22 15:37:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:06,649 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 415 transitions. [2018-10-22 15:37:06,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:37:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 415 transitions. [2018-10-22 15:37:06,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:37:06,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:06,651 INFO L375 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:06,651 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:06,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1396560024, now seen corresponding path program 2 times [2018-10-22 15:37:06,651 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:06,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:06,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:06,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:06,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:07,458 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2018-10-22 15:37:08,451 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 5 [2018-10-22 15:37:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 155 proven. 202 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-10-22 15:37:09,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:09,160 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:09,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:37:09,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:37:09,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:09,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:09,229 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2018-10-22 15:37:09,229 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:37:09,286 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 13 treesize of output 10 [2018-10-22 15:37:09,289 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2018-10-22 15:37:09,289 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,296 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 15:37:09,352 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 18 [2018-10-22 15:37:09,354 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:09,355 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-22 15:37:09,355 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,361 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,370 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2018-10-22 15:37:09,403 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:09,403 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:09,404 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:37:09,405 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,412 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,413 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:26 [2018-10-22 15:37:09,449 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 35 [2018-10-22 15:37:09,451 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2018-10-22 15:37:09,451 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,459 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:09,470 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2018-10-22 15:37:09,519 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2018-10-22 15:37:09,538 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:37:09,539 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,561 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,576 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:09,576 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2018-10-22 15:37:09,618 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2018-10-22 15:37:09,636 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:37:09,637 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,647 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,661 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:09,661 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2018-10-22 15:37:09,733 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2018-10-22 15:37:09,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:37:09,748 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,757 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,772 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:09,772 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2018-10-22 15:37:09,814 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2018-10-22 15:37:09,827 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:37:09,827 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,836 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,850 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-10-22 15:37:09,850 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:52, output treesize:48 [2018-10-22 15:37:17,915 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 33 [2018-10-22 15:37:19,967 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 35 [2018-10-22 15:37:22,023 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2018-10-22 15:37:24,119 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 39 [2018-10-22 15:37:26,280 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2018-10-22 15:37:28,355 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2018-10-22 15:37:30,478 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2018-10-22 15:37:32,553 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 47 [2018-10-22 15:37:32,569 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2018-10-22 15:37:32,610 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:32,616 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:37:32,617 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:32,617 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:37:32,618 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 35 [2018-10-22 15:37:32,618 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:32,639 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2018-10-22 15:37:32,639 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:32,642 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:32,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:32,652 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:69, output treesize:15 [2018-10-22 15:37:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 203 proven. 47 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2018-10-22 15:37:32,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:32,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 41 [2018-10-22 15:37:32,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:37:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:37:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1431, Unknown=3, NotChecked=0, Total=1640 [2018-10-22 15:37:32,793 INFO L87 Difference]: Start difference. First operand 366 states and 415 transitions. Second operand 41 states. [2018-10-22 15:37:57,291 WARN L179 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2018-10-22 15:38:01,573 WARN L179 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-10-22 15:38:05,740 WARN L179 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2018-10-22 15:38:11,969 WARN L179 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-10-22 15:38:16,325 WARN L179 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2018-10-22 15:38:20,550 WARN L179 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2018-10-22 15:38:24,756 WARN L179 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2018-10-22 15:38:29,474 WARN L179 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-10-22 15:38:33,786 WARN L179 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-10-22 15:38:38,059 WARN L179 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2018-10-22 15:38:42,326 WARN L179 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-10-22 15:38:50,563 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-10-22 15:38:58,792 WARN L179 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2018-10-22 15:39:11,036 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-10-22 15:39:23,311 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-10-22 15:39:49,671 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-10-22 15:40:04,068 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2018-10-22 15:40:12,426 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-10-22 15:40:50,844 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 Received shutdown request... [2018-10-22 15:40:58,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:40:58,885 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:40:58,888 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:40:58,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:40:58 BoogieIcfgContainer [2018-10-22 15:40:58,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:40:58,890 INFO L168 Benchmark]: Toolchain (without parser) took 274713.84 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -979.5 MB). Peak memory consumption was 89.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:58,890 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:40:58,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:58,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:40:58,891 INFO L168 Benchmark]: Boogie Preprocessor took 45.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:40:58,891 INFO L168 Benchmark]: RCFGBuilder took 651.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -774.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:58,892 INFO L168 Benchmark]: TraceAbstraction took 273645.80 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 310.9 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -215.2 MB). Peak memory consumption was 95.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:58,899 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 651.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -774.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 273645.80 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 310.9 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -215.2 MB). Peak memory consumption was 95.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (366states) and FLOYD_HOARE automaton (currently 27 states, 41 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 1 error locations. TIMEOUT Result, 273.5s OverallTime, 16 OverallIterations, 15 TraceHistogramMax, 230.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 679 SDtfs, 3357 SDslu, 4005 SDs, 0 SdLazy, 5555 SolverSat, 708 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 97.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1637 GetRequests, 1166 SyntacticMatches, 30 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 163.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 748 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 40.5s InterpolantComputationTime, 2566 NumberOfCodeBlocks, 2481 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2538 ConstructedInterpolants, 189 QuantifiedInterpolants, 3404005 SizeOfPredicates, 94 NumberOfNonLiveVariables, 1952 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 4730/5891 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown