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/loop-industry-pattern/nested_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:00:20,658 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:00:20,660 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:00:20,674 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:00:20,675 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:00:20,676 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:00:20,677 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:00:20,679 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:00:20,680 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:00:20,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:00:20,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:00:20,682 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:00:20,683 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:00:20,684 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:00:20,685 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:00:20,686 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:00:20,687 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:00:20,689 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:00:20,690 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:00:20,692 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:00:20,693 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:00:20,694 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:00:20,700 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:00:20,713 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 [2018-10-24 12:00:20,740 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:00:20,740 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:00:20,741 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:00:20,741 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 12:00:20,742 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 12:00:20,742 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 12:00:20,742 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 12:00:20,742 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:00:20,743 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:00:20,743 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:00:20,743 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:00:20,743 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:00:20,743 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:00:20,744 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:00:20,744 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:00:20,744 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:00:20,744 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:00:20,745 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:00:20,745 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:00:20,745 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:00:20,745 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:00:20,745 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:00:20,746 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:00:20,746 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 12:00:20,746 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:00:20,746 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:00:20,746 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:00:20,747 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:00:20,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:00:20,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:00:20,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:00:20,831 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:00:20,831 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:00:20,832 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-24 12:00:20,890 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2a964af6/541e34aca65d4b5db1e3c4bccd1e8522/FLAGccb9e4162 [2018-10-24 12:00:21,358 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:00:21,359 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-24 12:00:21,366 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2a964af6/541e34aca65d4b5db1e3c4bccd1e8522/FLAGccb9e4162 [2018-10-24 12:00:21,387 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2a964af6/541e34aca65d4b5db1e3c4bccd1e8522 [2018-10-24 12:00:21,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:00:21,401 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:00:21,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:00:21,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:00:21,407 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:00:21,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d4e6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21, skipping insertion in model container [2018-10-24 12:00:21,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:00:21,444 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:00:21,631 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:00:21,636 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:00:21,660 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:00:21,681 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:00:21,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21 WrapperNode [2018-10-24 12:00:21,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:00:21,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:00:21,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:00:21,684 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:00:21,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:00:21,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:00:21,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:00:21,724 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:00:21,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (1/1) ... [2018-10-24 12:00:21,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:00:21,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:00:21,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:00:21,747 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:00:21,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (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 [2018-10-24 12:00:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:00:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:00:22,289 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:00:22,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:00:22 BoogieIcfgContainer [2018-10-24 12:00:22,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:00:22,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:00:22,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:00:22,295 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:00:22,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:00:21" (1/3) ... [2018-10-24 12:00:22,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44052317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:00:22, skipping insertion in model container [2018-10-24 12:00:22,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:00:21" (2/3) ... [2018-10-24 12:00:22,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44052317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:00:22, skipping insertion in model container [2018-10-24 12:00:22,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:00:22" (3/3) ... [2018-10-24 12:00:22,299 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-10-24 12:00:22,311 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:00:22,322 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:00:22,372 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:00:22,432 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 12:00:22,433 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:00:22,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:00:22,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:00:22,434 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:00:22,434 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:00:22,434 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:00:22,434 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:00:22,434 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:00:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-24 12:00:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:00:22,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:22,460 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:22,462 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:22,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1650387823, now seen corresponding path program 1 times [2018-10-24 12:00:22,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:22,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:22,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:22,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:00:22,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:00:22,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:00:22,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:00:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:00:22,621 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-24 12:00:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:22,640 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2018-10-24 12:00:22,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:00:22,641 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-24 12:00:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:22,651 INFO L225 Difference]: With dead ends: 32 [2018-10-24 12:00:22,651 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 12:00:22,655 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 [2018-10-24 12:00:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 12:00:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 12:00:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 12:00:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-10-24 12:00:22,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2018-10-24 12:00:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:22,687 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-10-24 12:00:22,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:00:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2018-10-24 12:00:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 12:00:22,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:22,689 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:22,689 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:22,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 402334944, now seen corresponding path program 1 times [2018-10-24 12:00:22,690 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:22,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:22,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:22,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:00:22,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:00:22,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:00:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:00:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:00:22,760 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2018-10-24 12:00:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:22,903 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2018-10-24 12:00:22,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:00:22,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-24 12:00:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:22,904 INFO L225 Difference]: With dead ends: 35 [2018-10-24 12:00:22,905 INFO L226 Difference]: Without dead ends: 22 [2018-10-24 12:00:22,906 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 [2018-10-24 12:00:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-24 12:00:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2018-10-24 12:00:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 12:00:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-10-24 12:00:22,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2018-10-24 12:00:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:22,912 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-10-24 12:00:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:00:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2018-10-24 12:00:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 12:00:22,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:22,913 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:22,913 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:22,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash -272604169, now seen corresponding path program 1 times [2018-10-24 12:00:22,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:22,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:22,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:22,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:22,988 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 [2018-10-24 12:00:23,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:23,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 12:00:23,119 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:00:23,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 12:00:23,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:00:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:00:23,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:00:23,121 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2018-10-24 12:00:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:23,337 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2018-10-24 12:00:23,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:00:23,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-24 12:00:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:23,338 INFO L225 Difference]: With dead ends: 49 [2018-10-24 12:00:23,339 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:00:23,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:00:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:00:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2018-10-24 12:00:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-24 12:00:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2018-10-24 12:00:23,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2018-10-24 12:00:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:23,344 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2018-10-24 12:00:23,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:00:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2018-10-24 12:00:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:00:23,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:23,345 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:23,346 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:23,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash -703387572, now seen corresponding path program 1 times [2018-10-24 12:00:23,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:23,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:23,438 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 [2018-10-24 12:00:23,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:23,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:00:23,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-24 12:00:23,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 12:00:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 12:00:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:00:23,686 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2018-10-24 12:00:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:24,019 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2018-10-24 12:00:24,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 12:00:24,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-24 12:00:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:24,023 INFO L225 Difference]: With dead ends: 83 [2018-10-24 12:00:24,023 INFO L226 Difference]: Without dead ends: 63 [2018-10-24 12:00:24,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:00:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-24 12:00:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2018-10-24 12:00:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-24 12:00:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-10-24 12:00:24,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2018-10-24 12:00:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:24,034 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-10-24 12:00:24,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 12:00:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-10-24 12:00:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 12:00:24,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:24,035 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:24,035 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:24,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1205750631, now seen corresponding path program 1 times [2018-10-24 12:00:24,036 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:24,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:24,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:24,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:24,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:24,122 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 [2018-10-24 12:00:24,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:24,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:24,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-24 12:00:24,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:00:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:00:24,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:00:24,187 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2018-10-24 12:00:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:24,483 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2018-10-24 12:00:24,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:00:24,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-10-24 12:00:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:24,485 INFO L225 Difference]: With dead ends: 89 [2018-10-24 12:00:24,485 INFO L226 Difference]: Without dead ends: 53 [2018-10-24 12:00:24,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:00:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-24 12:00:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2018-10-24 12:00:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 12:00:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2018-10-24 12:00:24,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2018-10-24 12:00:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:24,494 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2018-10-24 12:00:24,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:00:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2018-10-24 12:00:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:00:24,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:24,496 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:24,496 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:24,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -304718848, now seen corresponding path program 2 times [2018-10-24 12:00:24,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:24,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:24,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:24,725 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 [2018-10-24 12:00:24,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:24,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:24,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:24,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-24 12:00:24,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:24,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-10-24 12:00:24,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 12:00:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 12:00:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:00:24,840 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2018-10-24 12:00:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:25,242 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2018-10-24 12:00:25,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 12:00:25,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-24 12:00:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:25,244 INFO L225 Difference]: With dead ends: 178 [2018-10-24 12:00:25,244 INFO L226 Difference]: Without dead ends: 134 [2018-10-24 12:00:25,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:00:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-24 12:00:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2018-10-24 12:00:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-24 12:00:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2018-10-24 12:00:25,260 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 28 [2018-10-24 12:00:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:25,261 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2018-10-24 12:00:25,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 12:00:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2018-10-24 12:00:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 12:00:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:25,263 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:25,263 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:25,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1043421413, now seen corresponding path program 1 times [2018-10-24 12:00:25,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:25,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:25,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:25,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:25,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:25,474 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 [2018-10-24 12:00:25,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:25,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:25,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-24 12:00:25,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 12:00:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 12:00:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:00:25,542 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 8 states. [2018-10-24 12:00:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:25,752 INFO L93 Difference]: Finished difference Result 279 states and 323 transitions. [2018-10-24 12:00:25,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:00:25,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-24 12:00:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:25,754 INFO L225 Difference]: With dead ends: 279 [2018-10-24 12:00:25,755 INFO L226 Difference]: Without dead ends: 183 [2018-10-24 12:00:25,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:00:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-24 12:00:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2018-10-24 12:00:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-24 12:00:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2018-10-24 12:00:25,773 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 32 [2018-10-24 12:00:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:25,773 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2018-10-24 12:00:25,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 12:00:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2018-10-24 12:00:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-24 12:00:25,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:25,775 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:25,775 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:25,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash -744681804, now seen corresponding path program 2 times [2018-10-24 12:00:25,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:25,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:25,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:25,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:25,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:26,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:26,030 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 [2018-10-24 12:00:26,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:26,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:26,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:26,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:26,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:26,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-24 12:00:26,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 12:00:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 12:00:26,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:00:26,102 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 9 states. [2018-10-24 12:00:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:26,255 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2018-10-24 12:00:26,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:00:26,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-10-24 12:00:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:26,258 INFO L225 Difference]: With dead ends: 311 [2018-10-24 12:00:26,258 INFO L226 Difference]: Without dead ends: 199 [2018-10-24 12:00:26,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:00:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-24 12:00:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2018-10-24 12:00:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-24 12:00:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2018-10-24 12:00:26,277 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2018-10-24 12:00:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:26,277 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2018-10-24 12:00:26,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 12:00:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2018-10-24 12:00:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 12:00:26,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:26,279 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:26,280 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:26,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash 38535629, now seen corresponding path program 3 times [2018-10-24 12:00:26,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:26,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:26,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:26,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:26,437 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 [2018-10-24 12:00:26,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:26,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:00:26,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:26,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-24 12:00:26,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:00:26,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2018-10-24 12:00:26,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 12:00:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 12:00:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:00:26,665 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand 16 states. [2018-10-24 12:00:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:27,591 INFO L93 Difference]: Finished difference Result 663 states and 767 transitions. [2018-10-24 12:00:27,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 12:00:27,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2018-10-24 12:00:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:27,595 INFO L225 Difference]: With dead ends: 663 [2018-10-24 12:00:27,595 INFO L226 Difference]: Without dead ends: 535 [2018-10-24 12:00:27,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:00:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-10-24 12:00:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 263. [2018-10-24 12:00:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-24 12:00:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 302 transitions. [2018-10-24 12:00:27,633 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 302 transitions. Word has length 40 [2018-10-24 12:00:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:27,633 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 302 transitions. [2018-10-24 12:00:27,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 12:00:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 302 transitions. [2018-10-24 12:00:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-24 12:00:27,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:27,636 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:27,636 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:27,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1908864387, now seen corresponding path program 3 times [2018-10-24 12:00:27,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:27,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:27,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:27,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:27,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:27,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:27,993 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 [2018-10-24 12:00:28,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:28,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:00:28,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:28,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-24 12:00:28,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:00:28,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2018-10-24 12:00:28,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 12:00:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 12:00:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:00:28,073 INFO L87 Difference]: Start difference. First operand 263 states and 302 transitions. Second operand 14 states. [2018-10-24 12:00:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:29,031 INFO L93 Difference]: Finished difference Result 666 states and 758 transitions. [2018-10-24 12:00:29,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 12:00:29,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2018-10-24 12:00:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:29,034 INFO L225 Difference]: With dead ends: 666 [2018-10-24 12:00:29,034 INFO L226 Difference]: Without dead ends: 512 [2018-10-24 12:00:29,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 12:00:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-10-24 12:00:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 315. [2018-10-24 12:00:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-24 12:00:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 359 transitions. [2018-10-24 12:00:29,068 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 359 transitions. Word has length 48 [2018-10-24 12:00:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 359 transitions. [2018-10-24 12:00:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 12:00:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 359 transitions. [2018-10-24 12:00:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 12:00:29,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:29,070 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:29,071 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:29,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -324593642, now seen corresponding path program 4 times [2018-10-24 12:00:29,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:29,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:29,375 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 [2018-10-24 12:00:29,385 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:29,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:29,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:29,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:29,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-24 12:00:29,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:00:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:00:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:00:29,474 INFO L87 Difference]: Start difference. First operand 315 states and 359 transitions. Second operand 13 states. [2018-10-24 12:00:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:29,903 INFO L93 Difference]: Finished difference Result 614 states and 703 transitions. [2018-10-24 12:00:29,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 12:00:29,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-24 12:00:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:29,910 INFO L225 Difference]: With dead ends: 614 [2018-10-24 12:00:29,910 INFO L226 Difference]: Without dead ends: 423 [2018-10-24 12:00:29,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:00:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-24 12:00:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 343. [2018-10-24 12:00:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-24 12:00:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2018-10-24 12:00:29,944 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 52 [2018-10-24 12:00:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:29,945 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2018-10-24 12:00:29,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:00:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2018-10-24 12:00:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 12:00:29,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:29,948 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:29,948 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:29,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash -411539409, now seen corresponding path program 5 times [2018-10-24 12:00:29,949 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:29,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:29,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:29,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:30,200 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 [2018-10-24 12:00:30,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:30,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 12:00:30,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:30,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:30,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-24 12:00:30,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 12:00:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 12:00:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:00:30,295 INFO L87 Difference]: Start difference. First operand 343 states and 390 transitions. Second operand 14 states. [2018-10-24 12:00:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:30,539 INFO L93 Difference]: Finished difference Result 658 states and 752 transitions. [2018-10-24 12:00:30,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 12:00:30,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2018-10-24 12:00:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:30,545 INFO L225 Difference]: With dead ends: 658 [2018-10-24 12:00:30,545 INFO L226 Difference]: Without dead ends: 451 [2018-10-24 12:00:30,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:00:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2018-10-24 12:00:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 371. [2018-10-24 12:00:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-24 12:00:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 421 transitions. [2018-10-24 12:00:30,581 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 421 transitions. Word has length 56 [2018-10-24 12:00:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:30,582 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 421 transitions. [2018-10-24 12:00:30,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 12:00:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 421 transitions. [2018-10-24 12:00:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-24 12:00:30,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:30,583 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:30,584 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:30,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2055341000, now seen corresponding path program 6 times [2018-10-24 12:00:30,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:30,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:30,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:30,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:30,800 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 [2018-10-24 12:00:30,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:30,849 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-24 12:00:30,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:30,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:31,573 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 12:00:31,902 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 12:00:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-10-24 12:00:32,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:00:32,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2018-10-24 12:00:32,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 12:00:32,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 12:00:32,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2018-10-24 12:00:32,236 INFO L87 Difference]: Start difference. First operand 371 states and 421 transitions. Second operand 21 states. [2018-10-24 12:00:32,680 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-24 12:00:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:35,966 INFO L93 Difference]: Finished difference Result 890 states and 1018 transitions. [2018-10-24 12:00:35,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 12:00:35,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2018-10-24 12:00:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:35,971 INFO L225 Difference]: With dead ends: 890 [2018-10-24 12:00:35,972 INFO L226 Difference]: Without dead ends: 667 [2018-10-24 12:00:35,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=897, Invalid=2885, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 12:00:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2018-10-24 12:00:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 411. [2018-10-24 12:00:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-24 12:00:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 465 transitions. [2018-10-24 12:00:36,012 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 465 transitions. Word has length 60 [2018-10-24 12:00:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:36,012 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 465 transitions. [2018-10-24 12:00:36,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 12:00:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 465 transitions. [2018-10-24 12:00:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 12:00:36,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:36,014 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:36,014 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:36,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1602534976, now seen corresponding path program 1 times [2018-10-24 12:00:36,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:36,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:36,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:36,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-24 12:00:36,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:00:36,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 12:00:36,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 12:00:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 12:00:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 12:00:36,255 INFO L87 Difference]: Start difference. First operand 411 states and 465 transitions. Second operand 4 states. [2018-10-24 12:00:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:36,388 INFO L93 Difference]: Finished difference Result 655 states and 744 transitions. [2018-10-24 12:00:36,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:00:36,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2018-10-24 12:00:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:36,391 INFO L225 Difference]: With dead ends: 655 [2018-10-24 12:00:36,391 INFO L226 Difference]: Without dead ends: 427 [2018-10-24 12:00:36,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 12:00:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-24 12:00:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 407. [2018-10-24 12:00:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-24 12:00:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 459 transitions. [2018-10-24 12:00:36,426 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 459 transitions. Word has length 68 [2018-10-24 12:00:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:36,426 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 459 transitions. [2018-10-24 12:00:36,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 12:00:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 459 transitions. [2018-10-24 12:00:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-24 12:00:36,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:36,428 INFO L375 BasicCegarLoop]: trace histogram [29, 27, 27, 25, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:36,428 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:36,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1528765977, now seen corresponding path program 1 times [2018-10-24 12:00:36,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:36,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:36,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:36,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-24 12:00:36,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:36,732 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 [2018-10-24 12:00:36,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:36,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 786 proven. 392 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-24 12:00:36,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:36,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-24 12:00:36,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 12:00:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 12:00:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:00:36,836 INFO L87 Difference]: Start difference. First operand 407 states and 459 transitions. Second operand 17 states. [2018-10-24 12:00:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:37,272 INFO L93 Difference]: Finished difference Result 784 states and 892 transitions. [2018-10-24 12:00:37,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 12:00:37,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2018-10-24 12:00:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:37,276 INFO L225 Difference]: With dead ends: 784 [2018-10-24 12:00:37,276 INFO L226 Difference]: Without dead ends: 549 [2018-10-24 12:00:37,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:00:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2018-10-24 12:00:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 451. [2018-10-24 12:00:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2018-10-24 12:00:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 508 transitions. [2018-10-24 12:00:37,320 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 508 transitions. Word has length 129 [2018-10-24 12:00:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:37,320 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 508 transitions. [2018-10-24 12:00:37,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 12:00:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 508 transitions. [2018-10-24 12:00:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-24 12:00:37,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:37,323 INFO L375 BasicCegarLoop]: trace histogram [32, 30, 30, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:37,323 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:37,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1089261280, now seen corresponding path program 2 times [2018-10-24 12:00:37,324 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:37,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:37,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:37,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:37,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-24 12:00:37,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:37,699 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:37,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:37,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:37,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:37,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-10-24 12:00:37,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:37,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-24 12:00:37,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 12:00:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 12:00:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 12:00:37,792 INFO L87 Difference]: Start difference. First operand 451 states and 508 transitions. Second operand 18 states. [2018-10-24 12:00:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:38,015 INFO L93 Difference]: Finished difference Result 826 states and 936 transitions. [2018-10-24 12:00:38,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 12:00:38,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2018-10-24 12:00:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:38,024 INFO L225 Difference]: With dead ends: 826 [2018-10-24 12:00:38,024 INFO L226 Difference]: Without dead ends: 559 [2018-10-24 12:00:38,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 12:00:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-10-24 12:00:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 479. [2018-10-24 12:00:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-10-24 12:00:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 539 transitions. [2018-10-24 12:00:38,072 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 539 transitions. Word has length 141 [2018-10-24 12:00:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:38,072 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 539 transitions. [2018-10-24 12:00:38,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 12:00:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 539 transitions. [2018-10-24 12:00:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-24 12:00:38,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:38,075 INFO L375 BasicCegarLoop]: trace histogram [34, 32, 32, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:38,075 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:38,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:38,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1922033728, now seen corresponding path program 3 times [2018-10-24 12:00:38,076 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:38,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:38,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:38,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 1092 proven. 512 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2018-10-24 12:00:38,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:38,770 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:38,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:00:38,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:38,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 62 proven. 1096 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-10-24 12:00:39,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:39,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2018-10-24 12:00:39,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 12:00:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 12:00:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:00:39,161 INFO L87 Difference]: Start difference. First operand 479 states and 539 transitions. Second operand 26 states. [2018-10-24 12:00:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:40,968 INFO L93 Difference]: Finished difference Result 1605 states and 1821 transitions. [2018-10-24 12:00:40,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-24 12:00:40,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2018-10-24 12:00:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:40,975 INFO L225 Difference]: With dead ends: 1605 [2018-10-24 12:00:40,975 INFO L226 Difference]: Without dead ends: 1322 [2018-10-24 12:00:40,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 12:00:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2018-10-24 12:00:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 811. [2018-10-24 12:00:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2018-10-24 12:00:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 916 transitions. [2018-10-24 12:00:41,074 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 916 transitions. Word has length 149 [2018-10-24 12:00:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:41,074 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 916 transitions. [2018-10-24 12:00:41,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 12:00:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 916 transitions. [2018-10-24 12:00:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 12:00:41,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:41,077 INFO L375 BasicCegarLoop]: trace histogram [36, 34, 34, 32, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:41,077 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:41,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 185234210, now seen corresponding path program 1 times [2018-10-24 12:00:41,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:41,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:41,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-24 12:00:41,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:41,745 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:41,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:41,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2388 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2018-10-24 12:00:41,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:41,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-24 12:00:41,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 12:00:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 12:00:41,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:00:41,842 INFO L87 Difference]: Start difference. First operand 811 states and 916 transitions. Second operand 20 states. [2018-10-24 12:00:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:42,100 INFO L93 Difference]: Finished difference Result 1574 states and 1780 transitions. [2018-10-24 12:00:42,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 12:00:42,101 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 157 [2018-10-24 12:00:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:42,105 INFO L225 Difference]: With dead ends: 1574 [2018-10-24 12:00:42,105 INFO L226 Difference]: Without dead ends: 971 [2018-10-24 12:00:42,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:00:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2018-10-24 12:00:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 839. [2018-10-24 12:00:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2018-10-24 12:00:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 947 transitions. [2018-10-24 12:00:42,213 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 947 transitions. Word has length 157 [2018-10-24 12:00:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:42,213 INFO L481 AbstractCegarLoop]: Abstraction has 839 states and 947 transitions. [2018-10-24 12:00:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 12:00:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 947 transitions. [2018-10-24 12:00:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 12:00:42,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:42,216 INFO L375 BasicCegarLoop]: trace histogram [38, 36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:42,216 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:42,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -359223042, now seen corresponding path program 2 times [2018-10-24 12:00:42,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:42,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:42,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:42,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:42,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 1372 proven. 648 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-10-24 12:00:43,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:43,429 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:43,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:43,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:43,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:43,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 6 proven. 250 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2018-10-24 12:00:43,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:43,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 23 [2018-10-24 12:00:43,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 12:00:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 12:00:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-24 12:00:43,612 INFO L87 Difference]: Start difference. First operand 839 states and 947 transitions. Second operand 23 states. [2018-10-24 12:00:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:44,942 INFO L93 Difference]: Finished difference Result 3963 states and 4287 transitions. [2018-10-24 12:00:44,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 12:00:44,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2018-10-24 12:00:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:44,954 INFO L225 Difference]: With dead ends: 3963 [2018-10-24 12:00:44,954 INFO L226 Difference]: Without dead ends: 3344 [2018-10-24 12:00:44,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=633, Invalid=1089, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 12:00:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2018-10-24 12:00:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 871. [2018-10-24 12:00:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2018-10-24 12:00:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 984 transitions. [2018-10-24 12:00:45,218 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 984 transitions. Word has length 165 [2018-10-24 12:00:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:45,218 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 984 transitions. [2018-10-24 12:00:45,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 12:00:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 984 transitions. [2018-10-24 12:00:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 12:00:45,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:45,221 INFO L375 BasicCegarLoop]: trace histogram [40, 38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:45,221 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:45,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1010720098, now seen corresponding path program 3 times [2018-10-24 12:00:45,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:45,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:45,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:45,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:45,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 1524 proven. 722 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-24 12:00:45,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:45,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:45,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:45,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:00:45,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:45,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:45,817 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 12:00:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2972 backedges. 74 proven. 1528 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2018-10-24 12:00:45,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:45,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-10-24 12:00:45,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 12:00:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 12:00:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:00:45,980 INFO L87 Difference]: Start difference. First operand 871 states and 984 transitions. Second operand 29 states. [2018-10-24 12:00:47,571 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-24 12:00:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:51,577 INFO L93 Difference]: Finished difference Result 3286 states and 3549 transitions. [2018-10-24 12:00:51,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-24 12:00:51,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2018-10-24 12:00:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:51,587 INFO L225 Difference]: With dead ends: 3286 [2018-10-24 12:00:51,587 INFO L226 Difference]: Without dead ends: 2643 [2018-10-24 12:00:51,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3621 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2388, Invalid=9822, Unknown=0, NotChecked=0, Total=12210 [2018-10-24 12:00:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2018-10-24 12:00:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 931. [2018-10-24 12:00:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 931 states. [2018-10-24 12:00:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1051 transitions. [2018-10-24 12:00:51,825 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1051 transitions. Word has length 173 [2018-10-24 12:00:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:51,826 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1051 transitions. [2018-10-24 12:00:51,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 12:00:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1051 transitions. [2018-10-24 12:00:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-24 12:00:51,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:51,828 INFO L375 BasicCegarLoop]: trace histogram [42, 40, 40, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:51,828 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:51,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1162401790, now seen corresponding path program 4 times [2018-10-24 12:00:51,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:51,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:51,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:51,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:51,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 1684 proven. 800 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-10-24 12:00:52,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:52,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:52,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:52,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:52,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:52,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 2428 proven. 119 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2018-10-24 12:00:52,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:52,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2018-10-24 12:00:52,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 12:00:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 12:00:52,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1471, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 12:00:52,958 INFO L87 Difference]: Start difference. First operand 931 states and 1051 transitions. Second operand 45 states. [2018-10-24 12:00:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:56,860 INFO L93 Difference]: Finished difference Result 3444 states and 3754 transitions. [2018-10-24 12:00:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 12:00:56,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-10-24 12:00:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:56,868 INFO L225 Difference]: With dead ends: 3444 [2018-10-24 12:00:56,868 INFO L226 Difference]: Without dead ends: 2753 [2018-10-24 12:00:56,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1586, Invalid=6070, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 12:00:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2018-10-24 12:00:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1409. [2018-10-24 12:00:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1409 states. [2018-10-24 12:00:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1548 transitions. [2018-10-24 12:00:57,233 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1548 transitions. Word has length 181 [2018-10-24 12:00:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:57,233 INFO L481 AbstractCegarLoop]: Abstraction has 1409 states and 1548 transitions. [2018-10-24 12:00:57,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 12:00:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1548 transitions. [2018-10-24 12:00:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-24 12:00:57,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:57,235 INFO L375 BasicCegarLoop]: trace histogram [44, 42, 42, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:57,235 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:57,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash -646928222, now seen corresponding path program 5 times [2018-10-24 12:00:57,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:57,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:57,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-24 12:00:57,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:57,840 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:57,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:57,893 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-24 12:00:57,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:57,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-10-24 12:00:57,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:57,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-24 12:00:57,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 12:00:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 12:00:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:00:57,947 INFO L87 Difference]: Start difference. First operand 1409 states and 1548 transitions. Second operand 24 states. [2018-10-24 12:01:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:00,753 INFO L93 Difference]: Finished difference Result 4037 states and 4325 transitions. [2018-10-24 12:01:00,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 12:01:00,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2018-10-24 12:01:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:00,761 INFO L225 Difference]: With dead ends: 4037 [2018-10-24 12:01:00,762 INFO L226 Difference]: Without dead ends: 2887 [2018-10-24 12:01:00,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:01:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-10-24 12:01:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1477. [2018-10-24 12:01:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1477 states. [2018-10-24 12:01:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1624 transitions. [2018-10-24 12:01:01,150 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1624 transitions. Word has length 189 [2018-10-24 12:01:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:01,151 INFO L481 AbstractCegarLoop]: Abstraction has 1477 states and 1624 transitions. [2018-10-24 12:01:01,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 12:01:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1624 transitions. [2018-10-24 12:01:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 12:01:01,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:01,153 INFO L375 BasicCegarLoop]: trace histogram [46, 44, 44, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:01,153 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:01,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1041308350, now seen corresponding path program 6 times [2018-10-24 12:01:01,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:01,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:01,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 2028 proven. 968 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2018-10-24 12:01:01,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:01,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:01,787 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-24 12:01:01,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:01,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 86 proven. 2032 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2018-10-24 12:01:02,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:02,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2018-10-24 12:01:02,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 12:01:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 12:01:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:01:02,002 INFO L87 Difference]: Start difference. First operand 1477 states and 1624 transitions. Second operand 32 states. [2018-10-24 12:01:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:07,069 INFO L93 Difference]: Finished difference Result 4413 states and 4744 transitions. [2018-10-24 12:01:07,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-24 12:01:07,069 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 197 [2018-10-24 12:01:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:07,078 INFO L225 Difference]: With dead ends: 4413 [2018-10-24 12:01:07,078 INFO L226 Difference]: Without dead ends: 3211 [2018-10-24 12:01:07,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2018-10-24 12:01:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2018-10-24 12:01:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 1657. [2018-10-24 12:01:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2018-10-24 12:01:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 1820 transitions. [2018-10-24 12:01:07,537 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 1820 transitions. Word has length 197 [2018-10-24 12:01:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:07,537 INFO L481 AbstractCegarLoop]: Abstraction has 1657 states and 1820 transitions. [2018-10-24 12:01:07,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 12:01:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 1820 transitions. [2018-10-24 12:01:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 12:01:07,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:07,540 INFO L375 BasicCegarLoop]: trace histogram [49, 47, 47, 45, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:07,540 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:07,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -179235847, now seen corresponding path program 1 times [2018-10-24 12:01:07,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:07,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:07,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:07,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:07,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-24 12:01:08,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:08,128 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:08,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:08,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4520 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-24 12:01:08,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:08,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-24 12:01:08,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 12:01:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 12:01:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:01:08,251 INFO L87 Difference]: Start difference. First operand 1657 states and 1820 transitions. Second operand 26 states. [2018-10-24 12:01:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:10,635 INFO L93 Difference]: Finished difference Result 4499 states and 4834 transitions. [2018-10-24 12:01:10,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 12:01:10,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 209 [2018-10-24 12:01:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:10,644 INFO L225 Difference]: With dead ends: 4499 [2018-10-24 12:01:10,644 INFO L226 Difference]: Without dead ends: 3133 [2018-10-24 12:01:10,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:01:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2018-10-24 12:01:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 1721. [2018-10-24 12:01:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2018-10-24 12:01:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 1892 transitions. [2018-10-24 12:01:11,100 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 1892 transitions. Word has length 209 [2018-10-24 12:01:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:11,101 INFO L481 AbstractCegarLoop]: Abstraction has 1721 states and 1892 transitions. [2018-10-24 12:01:11,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 12:01:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 1892 transitions. [2018-10-24 12:01:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-24 12:01:11,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:11,103 INFO L375 BasicCegarLoop]: trace histogram [50, 48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:11,103 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:11,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1355868544, now seen corresponding path program 2 times [2018-10-24 12:01:11,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:11,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:11,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:11,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:11,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 2404 proven. 1152 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-24 12:01:11,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:11,573 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:11,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:11,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:11,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:11,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4712 backedges. 6 proven. 3480 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2018-10-24 12:01:11,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:11,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2018-10-24 12:01:11,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 12:01:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 12:01:11,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:01:11,742 INFO L87 Difference]: Start difference. First operand 1721 states and 1892 transitions. Second operand 29 states. [2018-10-24 12:01:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:15,287 INFO L93 Difference]: Finished difference Result 5053 states and 5484 transitions. [2018-10-24 12:01:15,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 12:01:15,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 213 [2018-10-24 12:01:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:15,299 INFO L225 Difference]: With dead ends: 5053 [2018-10-24 12:01:15,299 INFO L226 Difference]: Without dead ends: 3639 [2018-10-24 12:01:15,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1056, Invalid=1806, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:01:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2018-10-24 12:01:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2249. [2018-10-24 12:01:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2249 states. [2018-10-24 12:01:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 2500 transitions. [2018-10-24 12:01:15,871 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 2500 transitions. Word has length 213 [2018-10-24 12:01:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:15,871 INFO L481 AbstractCegarLoop]: Abstraction has 2249 states and 2500 transitions. [2018-10-24 12:01:15,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 12:01:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 2500 transitions. [2018-10-24 12:01:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-24 12:01:15,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:15,874 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:15,874 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:15,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -998658784, now seen corresponding path program 3 times [2018-10-24 12:01:15,875 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:15,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:15,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:15,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 2604 proven. 1250 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2018-10-24 12:01:16,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:16,474 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:16,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:16,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:01:16,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:16,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5108 backedges. 98 proven. 2608 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2018-10-24 12:01:16,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:16,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2018-10-24 12:01:16,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 12:01:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 12:01:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:01:16,816 INFO L87 Difference]: Start difference. First operand 2249 states and 2500 transitions. Second operand 35 states. [2018-10-24 12:01:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:23,214 INFO L93 Difference]: Finished difference Result 5879 states and 6426 transitions. [2018-10-24 12:01:23,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-24 12:01:23,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 221 [2018-10-24 12:01:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:23,229 INFO L225 Difference]: With dead ends: 5879 [2018-10-24 12:01:23,229 INFO L226 Difference]: Without dead ends: 3958 [2018-10-24 12:01:23,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2812, Invalid=11950, Unknown=0, NotChecked=0, Total=14762 [2018-10-24 12:01:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2018-10-24 12:01:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2343. [2018-10-24 12:01:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2343 states. [2018-10-24 12:01:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 2603 transitions. [2018-10-24 12:01:23,819 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 2603 transitions. Word has length 221 [2018-10-24 12:01:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:23,820 INFO L481 AbstractCegarLoop]: Abstraction has 2343 states and 2603 transitions. [2018-10-24 12:01:23,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 12:01:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 2603 transitions. [2018-10-24 12:01:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-24 12:01:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:23,824 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-24 12:01:23,824 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:23,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -425570136, now seen corresponding path program 4 times [2018-10-24 12:01:23,824 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:23,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:23,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-24 12:01:24,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:24,262 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:24,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:24,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:24,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:24,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12505 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-10-24 12:01:24,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:24,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-24 12:01:24,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 12:01:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 12:01:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:01:24,495 INFO L87 Difference]: Start difference. First operand 2343 states and 2603 transitions. Second operand 29 states. [2018-10-24 12:01:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:27,626 INFO L93 Difference]: Finished difference Result 5864 states and 6404 transitions. [2018-10-24 12:01:27,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 12:01:27,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 342 [2018-10-24 12:01:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:27,633 INFO L225 Difference]: With dead ends: 5864 [2018-10-24 12:01:27,633 INFO L226 Difference]: Without dead ends: 3867 [2018-10-24 12:01:27,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:01:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2018-10-24 12:01:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2326. [2018-10-24 12:01:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2018-10-24 12:01:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 2592 transitions. [2018-10-24 12:01:28,450 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 2592 transitions. Word has length 342 [2018-10-24 12:01:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:28,450 INFO L481 AbstractCegarLoop]: Abstraction has 2326 states and 2592 transitions. [2018-10-24 12:01:28,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 12:01:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 2592 transitions. [2018-10-24 12:01:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-24 12:01:28,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:28,453 INFO L375 BasicCegarLoop]: trace histogram [84, 81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-24 12:01:28,453 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:28,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -997387231, now seen corresponding path program 5 times [2018-10-24 12:01:28,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:28,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:28,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:28,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:28,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-24 12:01:29,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:29,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:29,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:29,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-24 12:01:29,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:29,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-10-24 12:01:29,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:29,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-24 12:01:29,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 12:01:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 12:01:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:01:29,853 INFO L87 Difference]: Start difference. First operand 2326 states and 2592 transitions. Second operand 30 states. [2018-10-24 12:01:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:33,269 INFO L93 Difference]: Finished difference Result 5772 states and 6322 transitions. [2018-10-24 12:01:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 12:01:33,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 354 [2018-10-24 12:01:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:33,274 INFO L225 Difference]: With dead ends: 5772 [2018-10-24 12:01:33,275 INFO L226 Difference]: Without dead ends: 3812 [2018-10-24 12:01:33,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:01:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2018-10-24 12:01:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 2422. [2018-10-24 12:01:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2018-10-24 12:01:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2700 transitions. [2018-10-24 12:01:34,049 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2700 transitions. Word has length 354 [2018-10-24 12:01:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:34,049 INFO L481 AbstractCegarLoop]: Abstraction has 2422 states and 2700 transitions. [2018-10-24 12:01:34,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 12:01:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2700 transitions. [2018-10-24 12:01:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-24 12:01:34,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:34,052 INFO L375 BasicCegarLoop]: trace histogram [87, 84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-24 12:01:34,052 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:34,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1708873190, now seen corresponding path program 6 times [2018-10-24 12:01:34,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:34,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:34,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:34,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:34,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6504 proven. 1568 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2018-10-24 12:01:34,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:34,557 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:34,565 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:34,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-24 12:01:34,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:34,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14473 backedges. 6623 proven. 1 refuted. 0 times theorem prover too weak. 7849 trivial. 0 not checked. [2018-10-24 12:01:35,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:35,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 37 [2018-10-24 12:01:35,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 12:01:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 12:01:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=850, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 12:01:35,975 INFO L87 Difference]: Start difference. First operand 2422 states and 2700 transitions. Second operand 37 states. [2018-10-24 12:01:37,555 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-10-24 12:01:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:42,766 INFO L93 Difference]: Finished difference Result 6056 states and 6657 transitions. [2018-10-24 12:01:42,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 12:01:42,766 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 366 [2018-10-24 12:01:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:42,767 INFO L225 Difference]: With dead ends: 6056 [2018-10-24 12:01:42,767 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:01:42,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3027, Invalid=6479, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 12:01:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:01:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:01:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:01:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:01:42,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2018-10-24 12:01:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:42,772 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:01:42,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 12:01:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:01:42,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:01:42,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:01:43,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:43,339 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:43,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:48,812 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:51,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:54,190 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:54,313 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:01:56,835 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:01,475 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:11,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:36,352 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,265 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,282 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,297 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,316 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:37,338 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:38,961 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:38,978 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:38,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:38,995 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,001 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,029 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,036 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:39,053 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,259 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,331 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:41,340 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,144 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,157 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,169 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,178 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:44,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,686 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,710 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,716 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:46,738 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:49,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:49,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:49,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:49,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:49,311 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,275 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,293 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,352 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,370 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:02:56,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:10,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,687 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,715 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,723 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,732 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,760 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:20,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,494 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,502 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,537 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,598 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,638 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,661 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:37,675 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:42,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:45,757 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:51,073 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:03:59,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:02,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:03,014 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:11,560 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:11,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:22,578 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:23,060 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:29,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:32,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:32,910 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:04:34,412 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-10-24 12:04:38,022 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-24 12:04:38,024 INFO L168 Benchmark]: Toolchain (without parser) took 256623.73 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -95.4 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-24 12:04:38,024 INFO L168 Benchmark]: CDTParser took 0.26 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. [2018-10-24 12:04:38,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.51 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. [2018-10-24 12:04:38,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.35 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. [2018-10-24 12:04:38,026 INFO L168 Benchmark]: Boogie Preprocessor took 22.54 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. [2018-10-24 12:04:38,026 INFO L168 Benchmark]: RCFGBuilder took 544.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:38,027 INFO L168 Benchmark]: TraceAbstraction took 255731.25 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 1.5 GB in the end (delta: 689.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-24 12:04:38,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 280.51 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 39.35 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 22.54 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 544.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 255731.25 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 1.5 GB in the end (delta: 689.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 6775. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown