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-invgen/half_2_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:46:53,507 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:46:53,509 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:46:53,521 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:46:53,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:46:53,522 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:46:53,523 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:46:53,525 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:46:53,527 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:46:53,528 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:46:53,529 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:46:53,529 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:46:53,530 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:46:53,531 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:46:53,532 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:46:53,533 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:46:53,534 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:46:53,536 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:46:53,538 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:46:53,540 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:46:53,541 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:46:53,543 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:46:53,545 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:46:53,555 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:46:53,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:46:53,571 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:46:53,572 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:46:53,572 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:46:53,573 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:46:53,573 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:46:53,573 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:46:53,574 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:46:53,574 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:46:53,574 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:46:53,574 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:46:53,575 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:46:53,575 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:46:53,575 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:46:53,576 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:46:53,576 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:46:53,576 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:46:53,576 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:46:53,577 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:46:53,577 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:46:53,577 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:46:53,577 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:46:53,577 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:46:53,578 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:46:53,578 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:46:53,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:46:53,578 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:46:53,578 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:46:53,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:46:53,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:46:53,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:46:53,679 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:46:53,680 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:46:53,680 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-10-22 15:46:53,738 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/40f03f692/1f68f9bcd3d14d6c918d38a92941a61a/FLAG41eb81ac2 [2018-10-22 15:46:54,210 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:46:54,211 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-10-22 15:46:54,218 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/40f03f692/1f68f9bcd3d14d6c918d38a92941a61a/FLAG41eb81ac2 [2018-10-22 15:46:54,242 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/40f03f692/1f68f9bcd3d14d6c918d38a92941a61a [2018-10-22 15:46:54,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:46:54,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:46:54,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:54,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:46:54,264 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:46:54,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51be25fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54, skipping insertion in model container [2018-10-22 15:46:54,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:46:54,305 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:46:54,505 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:54,510 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:46:54,530 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:54,550 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:46:54,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54 WrapperNode [2018-10-22 15:46:54,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:54,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:54,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:46:54,552 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:46:54,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:54,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:46:54,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:46:54,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:46:54,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... [2018-10-22 15:46:54,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:46:54,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:46:54,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:46:54,621 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:46:54,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:46:54,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:46:54,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:46:55,006 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:46:55,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:55 BoogieIcfgContainer [2018-10-22 15:46:55,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:46:55,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:46:55,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:46:55,019 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:46:55,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:46:54" (1/3) ... [2018-10-22 15:46:55,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59daea4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:55, skipping insertion in model container [2018-10-22 15:46:55,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:54" (2/3) ... [2018-10-22 15:46:55,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59daea4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:55, skipping insertion in model container [2018-10-22 15:46:55,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:55" (3/3) ... [2018-10-22 15:46:55,029 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2_true-unreach-call_true-termination.i [2018-10-22 15:46:55,055 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:46:55,072 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:46:55,106 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:46:55,139 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:46:55,140 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:46:55,140 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:46:55,140 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:46:55,140 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:46:55,140 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:46:55,141 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:46:55,141 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:46:55,141 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:46:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-22 15:46:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:46:55,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:55,161 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:55,164 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:55,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1475821806, now seen corresponding path program 1 times [2018-10-22 15:46:55,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:55,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:55,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:55,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:55,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:55,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:46:55,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:46:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:46:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:46:55,311 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-10-22 15:46:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:55,336 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2018-10-22 15:46:55,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:46:55,338 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-22 15:46:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:55,354 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:46:55,355 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:46:55,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:46:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:46:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 15:46:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:46:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-22 15:46:55,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2018-10-22 15:46:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:55,401 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-22 15:46:55,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:46:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-22 15:46:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:46:55,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:55,402 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:55,402 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:55,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -179909771, now seen corresponding path program 1 times [2018-10-22 15:46:55,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:55,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:55,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:55,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:55,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:46:55,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:46:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:46:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:46:55,536 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-10-22 15:46:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:55,681 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-22 15:46:55,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:46:55,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:46:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:55,683 INFO L225 Difference]: With dead ends: 23 [2018-10-22 15:46:55,683 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:46:55,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:46:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:46:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:46:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 15:46:55,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-22 15:46:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:55,688 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 15:46:55,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:46:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 15:46:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:46:55,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:55,689 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:55,690 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:55,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1810121807, now seen corresponding path program 1 times [2018-10-22 15:46:55,690 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:55,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:55,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:55,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:55,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:55,937 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:46:55,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:56,200 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-22 15:46:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:56,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:56,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:46:56,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:46:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:46:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:56,303 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-22 15:46:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:56,469 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-22 15:46:56,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:46:56,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-22 15:46:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:56,471 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:46:56,471 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:46:56,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:46:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:46:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:46:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:46:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:46:56,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2018-10-22 15:46:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:56,477 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:46:56,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:46:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:46:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:46:56,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:56,478 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:56,479 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:56,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1324945751, now seen corresponding path program 2 times [2018-10-22 15:46:56,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:56,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:56,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:56,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:56,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:56,559 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:46:56,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:56,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:56,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:56,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:56,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:56,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-10-22 15:46:56,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:46:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:46:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:46:56,838 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-22 15:46:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:56,988 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-22 15:46:56,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:46:56,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-22 15:46:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:56,992 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:46:56,992 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:46:56,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:46:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:46:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2018-10-22 15:46:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 15:46:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-22 15:46:56,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-22 15:46:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:56,998 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-22 15:46:56,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:46:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-22 15:46:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:46:56,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:57,000 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:57,000 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:57,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash -367652814, now seen corresponding path program 1 times [2018-10-22 15:46:57,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:57,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:57,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:57,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:57,560 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-22 15:46:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:57,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:57,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:46:57,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:57,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:58,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:58,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-10-22 15:46:58,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:46:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:46:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:46:58,095 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-10-22 15:46:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:58,552 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-10-22 15:46:58,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:46:58,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-10-22 15:46:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:58,554 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:46:58,554 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:46:58,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:46:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 15:46:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:46:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 15:46:58,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-22 15:46:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:58,559 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 15:46:58,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:46:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 15:46:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:46:58,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:58,561 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:58,561 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:58,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash -905834740, now seen corresponding path program 2 times [2018-10-22 15:46:58,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:58,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:58,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:58,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:58,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:58,690 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:46:58,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:58,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:58,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:58,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:58,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:58,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-22 15:46:58,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:46:58,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:46:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:46:58,836 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2018-10-22 15:46:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:59,028 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-22 15:46:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:46:59,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-22 15:46:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:59,032 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:46:59,032 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:46:59,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:46:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2018-10-22 15:46:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:46:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 15:46:59,038 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-10-22 15:46:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:59,038 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 15:46:59,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:46:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 15:46:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 15:46:59,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:59,039 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:59,040 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:59,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash -705411307, now seen corresponding path program 3 times [2018-10-22 15:46:59,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:59,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:59,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:59,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:59,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:59,714 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:46:59,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:59,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:46:59,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:59,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:46:59,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:00,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-22 15:47:00,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:47:00,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:47:00,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:47:00,001 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 22 states. [2018-10-22 15:47:00,293 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-10-22 15:47:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:00,950 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-10-22 15:47:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:47:00,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2018-10-22 15:47:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:00,952 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:47:00,952 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:47:00,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:47:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-22 15:47:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 15:47:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-22 15:47:00,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-22 15:47:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:00,960 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-22 15:47:00,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:47:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-22 15:47:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:47:00,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:00,961 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:00,961 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:00,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1417165423, now seen corresponding path program 4 times [2018-10-22 15:47:00,962 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:00,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:00,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:00,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:01,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:01,142 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:01,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:01,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:01,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:01,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:01,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-10-22 15:47:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:47:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:47:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:47:01,338 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 17 states. [2018-10-22 15:47:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:01,637 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-22 15:47:01,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:47:01,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-22 15:47:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:01,639 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:47:01,640 INFO L226 Difference]: Without dead ends: 38 [2018-10-22 15:47:01,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:47:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-22 15:47:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2018-10-22 15:47:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:47:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-22 15:47:01,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-22 15:47:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:01,648 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-22 15:47:01,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:47:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-22 15:47:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:47:01,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:01,649 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:01,649 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:01,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1731196680, now seen corresponding path program 5 times [2018-10-22 15:47:01,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:01,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:01,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:01,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:01,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:02,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:02,320 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:02,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-22 15:47:02,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:02,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:02,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:02,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-10-22 15:47:02,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:47:02,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:47:02,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:47:02,679 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 24 states. [2018-10-22 15:47:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:03,370 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2018-10-22 15:47:03,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:47:03,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2018-10-22 15:47:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:03,372 INFO L225 Difference]: With dead ends: 56 [2018-10-22 15:47:03,372 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:47:03,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:47:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-22 15:47:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:47:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-22 15:47:03,383 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-22 15:47:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:03,383 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-22 15:47:03,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:47:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-22 15:47:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:47:03,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:03,390 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:03,390 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:03,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash 205689042, now seen corresponding path program 6 times [2018-10-22 15:47:03,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:03,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:03,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:03,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:03,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:03,714 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:03,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:03,791 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-22 15:47:03,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:03,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:04,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:04,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-22 15:47:04,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:47:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:47:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:47:04,184 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2018-10-22 15:47:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:04,452 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-22 15:47:04,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:47:04,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-10-22 15:47:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:04,454 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:47:04,455 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 15:47:04,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:47:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 15:47:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2018-10-22 15:47:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:47:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-22 15:47:04,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2018-10-22 15:47:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-22 15:47:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:47:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-22 15:47:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:47:04,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:04,464 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:04,464 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:04,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 485651931, now seen corresponding path program 7 times [2018-10-22 15:47:04,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:04,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:04,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:04,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:04,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:04,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:04,907 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:04,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:04,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:05,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:05,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-10-22 15:47:05,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:47:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:47:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:47:05,707 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 28 states. [2018-10-22 15:47:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:06,771 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2018-10-22 15:47:06,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:47:06,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2018-10-22 15:47:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:06,773 INFO L225 Difference]: With dead ends: 66 [2018-10-22 15:47:06,773 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:47:06,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:47:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:47:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-22 15:47:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:47:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-22 15:47:06,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-22 15:47:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:06,781 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-22 15:47:06,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:47:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-22 15:47:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:47:06,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:06,782 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:06,782 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:06,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash 674378293, now seen corresponding path program 8 times [2018-10-22 15:47:06,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:06,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:07,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:07,125 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:07,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:07,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:07,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:07,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:07,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:07,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2018-10-22 15:47:07,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:47:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:47:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:47:07,464 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2018-10-22 15:47:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:07,864 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-22 15:47:07,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:47:07,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-10-22 15:47:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:07,865 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:47:07,865 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 15:47:07,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 15:47:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-10-22 15:47:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:47:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-22 15:47:07,874 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-22 15:47:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:07,874 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-22 15:47:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:47:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-22 15:47:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:47:07,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:07,875 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:07,876 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:07,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1952666178, now seen corresponding path program 9 times [2018-10-22 15:47:07,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:07,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:07,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:07,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:07,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:08,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:08,508 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:08,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:08,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 15:47:08,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:08,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:09,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:09,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-10-22 15:47:09,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:47:09,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:47:09,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:09,095 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 34 states. [2018-10-22 15:47:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:10,452 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2018-10-22 15:47:10,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:47:10,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2018-10-22 15:47:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:10,454 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:47:10,455 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:47:10,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=2645, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:47:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-22 15:47:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-22 15:47:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-22 15:47:10,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-22 15:47:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:10,465 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-22 15:47:10,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:47:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-22 15:47:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:47:10,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:10,466 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:10,467 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:10,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:10,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1743765864, now seen corresponding path program 10 times [2018-10-22 15:47:10,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:10,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:10,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:10,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:10,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:10,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:10,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:10,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:10,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:10,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:10,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:11,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:11,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-10-22 15:47:11,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:47:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:47:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:11,122 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2018-10-22 15:47:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:11,752 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-22 15:47:11,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:47:11,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-10-22 15:47:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:11,754 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:47:11,754 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:47:11,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:47:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2018-10-22 15:47:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-22 15:47:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-22 15:47:11,764 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-10-22 15:47:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:11,764 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-22 15:47:11,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:47:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-22 15:47:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-22 15:47:11,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:11,765 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:11,766 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:11,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:11,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1962422111, now seen corresponding path program 11 times [2018-10-22 15:47:11,766 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:11,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:11,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:11,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:11,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 55 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:12,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:12,588 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 [2018-10-22 15:47:12,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:12,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 15:47:12,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:12,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:13,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:13,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-10-22 15:47:13,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:47:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:47:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:47:13,188 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2018-10-22 15:47:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:14,353 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-10-22 15:47:14,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:47:14,353 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2018-10-22 15:47:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:14,354 INFO L225 Difference]: With dead ends: 86 [2018-10-22 15:47:14,355 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:47:14,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:47:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:47:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-22 15:47:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-22 15:47:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-22 15:47:14,365 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-22 15:47:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:14,365 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-22 15:47:14,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:47:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-22 15:47:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:47:14,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:14,366 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:14,367 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:14,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1029843461, now seen corresponding path program 12 times [2018-10-22 15:47:14,367 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:14,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 56 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:14,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:14,645 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 [2018-10-22 15:47:14,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:14,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-22 15:47:14,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:14,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:14,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:14,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-22 15:47:14,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:47:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:47:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:47:14,899 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 28 states. [2018-10-22 15:47:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:15,368 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-22 15:47:15,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:47:15,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-10-22 15:47:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:15,370 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:47:15,370 INFO L226 Difference]: Without dead ends: 62 [2018-10-22 15:47:15,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:47:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-22 15:47:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2018-10-22 15:47:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-22 15:47:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-22 15:47:15,381 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-10-22 15:47:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:15,381 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-22 15:47:15,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:47:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-22 15:47:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-22 15:47:15,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:15,382 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:15,382 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:15,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash -60490108, now seen corresponding path program 13 times [2018-10-22 15:47:15,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:15,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:15,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:15,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:15,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 78 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:16,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:16,119 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 [2018-10-22 15:47:16,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:16,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:16,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:16,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-10-22 15:47:16,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:47:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:47:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:16,759 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 40 states. [2018-10-22 15:47:17,448 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 13 [2018-10-22 15:47:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:18,318 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2018-10-22 15:47:18,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:47:18,318 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 54 [2018-10-22 15:47:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:18,319 INFO L225 Difference]: With dead ends: 96 [2018-10-22 15:47:18,319 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:47:18,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=346, Invalid=2624, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:47:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-22 15:47:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-22 15:47:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-22 15:47:18,328 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-22 15:47:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:18,328 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-22 15:47:18,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:47:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-22 15:47:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:47:18,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:18,329 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:18,330 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:18,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1013704610, now seen corresponding path program 14 times [2018-10-22 15:47:18,330 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:18,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:18,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:18,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:18,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:19,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:19,920 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 [2018-10-22 15:47:19,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:19,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:19,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:19,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:20,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:20,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 31 [2018-10-22 15:47:20,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:47:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:47:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:20,212 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 31 states. [2018-10-22 15:47:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:20,869 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-22 15:47:20,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:47:20,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-10-22 15:47:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:20,869 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:47:20,870 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:47:20,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=455, Invalid=1897, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:47:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:47:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-10-22 15:47:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-22 15:47:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-22 15:47:20,880 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2018-10-22 15:47:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:20,881 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-22 15:47:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:47:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-22 15:47:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-22 15:47:20,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:20,882 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:20,882 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:20,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash 970807143, now seen corresponding path program 15 times [2018-10-22 15:47:20,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:20,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:20,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:20,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:22,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:22,082 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 [2018-10-22 15:47:22,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:22,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:47:22,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:22,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:23,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:23,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2018-10-22 15:47:23,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:47:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:47:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:47:23,208 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 45 states. [2018-10-22 15:47:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:24,715 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2018-10-22 15:47:24,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:47:24,715 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 60 [2018-10-22 15:47:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:24,716 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:47:24,716 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:47:24,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=527, Invalid=3633, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:47:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:47:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-22 15:47:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 15:47:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-22 15:47:24,727 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-22 15:47:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:24,727 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-22 15:47:24,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:47:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-22 15:47:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:47:24,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:24,728 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:24,729 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:24,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash 698623425, now seen corresponding path program 16 times [2018-10-22 15:47:24,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:24,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:24,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:24,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:24,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 90 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:25,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:25,099 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 [2018-10-22 15:47:25,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:25,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:25,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:25,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:25,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:25,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-10-22 15:47:25,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:47:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:47:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:47:25,878 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 35 states. [2018-10-22 15:47:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:26,532 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-22 15:47:26,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:26,533 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-10-22 15:47:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:26,534 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:47:26,534 INFO L226 Difference]: Without dead ends: 74 [2018-10-22 15:47:26,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-22 15:47:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2018-10-22 15:47:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-22 15:47:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-22 15:47:26,543 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-10-22 15:47:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:26,543 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-22 15:47:26,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:47:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-22 15:47:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-22 15:47:26,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:26,544 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:26,544 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:26,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:26,544 INFO L82 PathProgramCache]: Analyzing trace with hash -728630454, now seen corresponding path program 17 times [2018-10-22 15:47:26,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:26,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:26,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:26,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:26,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 136 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:27,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:27,488 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 [2018-10-22 15:47:27,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:27,536 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-22 15:47:27,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:27,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:28,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:28,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2018-10-22 15:47:28,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:47:28,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:47:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:47:28,867 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-10-22 15:47:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:30,295 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2018-10-22 15:47:30,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:30,296 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-10-22 15:47:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:30,296 INFO L225 Difference]: With dead ends: 116 [2018-10-22 15:47:30,296 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:47:30,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=477, Invalid=3945, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:47:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:47:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-22 15:47:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-22 15:47:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-22 15:47:30,306 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-22 15:47:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:30,306 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-22 15:47:30,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:47:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-22 15:47:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:47:30,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:30,307 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:30,307 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:30,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash 880221732, now seen corresponding path program 18 times [2018-10-22 15:47:30,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:30,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:30,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:30,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:30,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 110 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:31,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:31,481 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 [2018-10-22 15:47:31,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:31,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-22 15:47:31,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:31,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:32,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:32,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-22 15:47:32,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:47:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:47:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:47:32,102 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 37 states. [2018-10-22 15:47:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:32,978 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-22 15:47:32,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:47:32,979 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-10-22 15:47:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:32,980 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:47:32,981 INFO L226 Difference]: Without dead ends: 80 [2018-10-22 15:47:32,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=643, Invalid=2779, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:47:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-22 15:47:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2018-10-22 15:47:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 15:47:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-22 15:47:32,990 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-10-22 15:47:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:32,991 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-22 15:47:32,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:47:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-22 15:47:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-22 15:47:32,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:32,992 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:32,992 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:32,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -761525715, now seen corresponding path program 19 times [2018-10-22 15:47:32,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:32,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:32,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:32,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:32,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:34,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:34,052 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 [2018-10-22 15:47:34,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:34,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:35,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:35,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2018-10-22 15:47:35,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:47:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:47:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:47:35,076 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 52 states. [2018-10-22 15:47:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:36,815 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2018-10-22 15:47:36,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:47:36,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 72 [2018-10-22 15:47:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:36,816 INFO L225 Difference]: With dead ends: 126 [2018-10-22 15:47:36,817 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:47:36,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:47:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:47:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-22 15:47:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-22 15:47:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-22 15:47:36,828 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-22 15:47:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:36,828 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-22 15:47:36,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:47:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-22 15:47:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:47:36,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:36,829 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:36,830 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:36,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1834081913, now seen corresponding path program 20 times [2018-10-22 15:47:36,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:36,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:36,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:36,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:36,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 132 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:37,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:37,395 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 [2018-10-22 15:47:37,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:37,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:37,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:37,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:37,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:37,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-22 15:47:37,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:47:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:47:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:37,991 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 40 states. [2018-10-22 15:47:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:38,794 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-10-22 15:47:38,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:47:38,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-10-22 15:47:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:38,795 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:47:38,795 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:47:38,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=749, Invalid=3283, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:47:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:47:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2018-10-22 15:47:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-22 15:47:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-22 15:47:38,808 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-10-22 15:47:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:38,808 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-22 15:47:38,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:47:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-22 15:47:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-22 15:47:38,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:38,809 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:38,809 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:38,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1829544976, now seen corresponding path program 21 times [2018-10-22 15:47:38,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:38,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:38,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:38,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:38,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 210 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:40,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:40,656 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 [2018-10-22 15:47:40,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:40,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-22 15:47:40,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:40,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:41,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:41,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2018-10-22 15:47:41,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:47:41,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:47:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:47:41,646 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 57 states. [2018-10-22 15:47:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:43,673 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2018-10-22 15:47:43,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:47:43,680 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 78 [2018-10-22 15:47:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:43,680 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:47:43,680 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:47:43,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=815, Invalid=5991, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:47:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:47:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-22 15:47:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-22 15:47:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-22 15:47:43,691 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-22 15:47:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:43,692 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-22 15:47:43,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:47:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-22 15:47:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:47:43,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:43,692 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:43,693 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:43,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1612558358, now seen corresponding path program 22 times [2018-10-22 15:47:43,693 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:43,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:43,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:43,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:43,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 156 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:44,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:44,064 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 [2018-10-22 15:47:44,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:44,102 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:44,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:44,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:44,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:44,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-10-22 15:47:44,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:47:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:47:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1544, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:47:44,625 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 44 states. [2018-10-22 15:47:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:45,479 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-10-22 15:47:45,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:47:45,480 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-10-22 15:47:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:45,481 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:47:45,481 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 15:47:45,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=881, Invalid=3949, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:47:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 15:47:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2018-10-22 15:47:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-22 15:47:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-22 15:47:45,496 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2018-10-22 15:47:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:45,496 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-22 15:47:45,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:47:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-22 15:47:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-22 15:47:45,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:45,497 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:45,497 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:45,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1307371763, now seen corresponding path program 23 times [2018-10-22 15:47:45,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:45,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:45,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:45,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:45,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 253 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:46,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:46,529 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 [2018-10-22 15:47:46,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:46,586 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-22 15:47:46,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:46,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:47,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:47,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 60 [2018-10-22 15:47:47,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-22 15:47:47,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-22 15:47:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:47:47,732 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 60 states. [2018-10-22 15:47:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:49,807 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2018-10-22 15:47:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:47:49,807 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 84 [2018-10-22 15:47:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:49,808 INFO L225 Difference]: With dead ends: 146 [2018-10-22 15:47:49,808 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:47:49,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:47:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:47:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-22 15:47:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-22 15:47:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-22 15:47:49,821 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-22 15:47:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:49,821 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-22 15:47:49,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-22 15:47:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-22 15:47:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:47:49,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:49,822 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:49,822 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:49,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash 581224781, now seen corresponding path program 24 times [2018-10-22 15:47:49,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:49,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:49,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:49,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 182 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:50,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:50,211 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 [2018-10-22 15:47:50,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:50,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-22 15:47:50,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:50,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:50,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:50,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-22 15:47:50,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:47:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:47:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:47:50,748 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2018-10-22 15:47:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:51,863 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2018-10-22 15:47:51,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:47:51,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2018-10-22 15:47:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:51,864 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:47:51,864 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 15:47:51,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=985, Invalid=4417, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:47:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 15:47:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2018-10-22 15:47:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-22 15:47:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-22 15:47:51,880 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-10-22 15:47:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:51,880 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-22 15:47:51,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:47:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-22 15:47:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-22 15:47:51,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:51,880 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:51,881 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:51,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1312684246, now seen corresponding path program 25 times [2018-10-22 15:47:51,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:51,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:51,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:51,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:51,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 300 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:53,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:53,272 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:53,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:53,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:54,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:54,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 64 [2018-10-22 15:47:54,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-22 15:47:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-22 15:47:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:47:54,687 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 64 states. [2018-10-22 15:47:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:57,426 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2018-10-22 15:47:57,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:47:57,427 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 90 [2018-10-22 15:47:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:57,428 INFO L225 Difference]: With dead ends: 156 [2018-10-22 15:47:57,428 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:47:57,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=799, Invalid=7391, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:47:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:47:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-22 15:47:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-22 15:47:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-22 15:47:57,447 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-22 15:47:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:57,447 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-22 15:47:57,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-22 15:47:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-22 15:47:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:47:57,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:57,448 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:57,448 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:57,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1971409488, now seen corresponding path program 26 times [2018-10-22 15:47:57,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:57,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:57,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:57,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:57,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 210 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:57,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:57,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:47:57,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:58,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:58,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:58,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:58,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:58,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-22 15:47:58,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:47:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:47:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:47:58,731 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 49 states. [2018-10-22 15:47:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:59,999 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2018-10-22 15:47:59,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:48:00,000 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 92 [2018-10-22 15:48:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:00,001 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:48:00,001 INFO L226 Difference]: Without dead ends: 104 [2018-10-22 15:48:00,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1115, Invalid=5047, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:48:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-22 15:48:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2018-10-22 15:48:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-22 15:48:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-22 15:48:00,019 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-10-22 15:48:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:00,020 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-22 15:48:00,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:48:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-22 15:48:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-22 15:48:00,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:00,021 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:00,021 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:00,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1275530311, now seen corresponding path program 27 times [2018-10-22 15:48:00,021 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:00,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:00,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:00,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:00,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 351 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:01,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:01,303 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:01,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:01,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:48:01,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:01,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:02,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:02,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2018-10-22 15:48:02,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:48:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:48:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:48:02,666 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 69 states. [2018-10-22 15:48:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:05,650 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2018-10-22 15:48:05,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:48:05,651 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 96 [2018-10-22 15:48:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:05,651 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:48:05,651 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:48:05,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1166, Invalid=8934, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:48:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:48:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-22 15:48:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-22 15:48:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-22 15:48:05,666 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-22 15:48:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:05,666 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-22 15:48:05,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:48:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-22 15:48:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-22 15:48:05,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:05,667 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:05,667 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:05,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1376707309, now seen corresponding path program 28 times [2018-10-22 15:48:05,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:05,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 240 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:06,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:06,193 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:06,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:06,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:06,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:06,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:06,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:06,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 53 [2018-10-22 15:48:06,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:48:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:48:06,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:48:06,859 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 53 states. [2018-10-22 15:48:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:08,012 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2018-10-22 15:48:08,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:48:08,012 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 98 [2018-10-22 15:48:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:08,013 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:48:08,014 INFO L226 Difference]: Without dead ends: 110 [2018-10-22 15:48:08,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1274, Invalid=5866, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:48:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-22 15:48:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2018-10-22 15:48:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 15:48:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-22 15:48:08,032 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-10-22 15:48:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-22 15:48:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:48:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-22 15:48:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-22 15:48:08,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:08,033 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:08,033 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:08,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -267454052, now seen corresponding path program 29 times [2018-10-22 15:48:08,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:08,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:08,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:08,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:08,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 406 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:09,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:09,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:09,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:09,808 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-22 15:48:09,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:09,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:11,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:11,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2018-10-22 15:48:11,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:48:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:48:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4553, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:48:11,460 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 72 states. [2018-10-22 15:48:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:14,847 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2018-10-22 15:48:14,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:48:14,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 102 [2018-10-22 15:48:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:14,849 INFO L225 Difference]: With dead ends: 176 [2018-10-22 15:48:14,849 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:48:14,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=990, Invalid=9516, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:48:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:48:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-22 15:48:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-22 15:48:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-22 15:48:14,868 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-22 15:48:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:14,868 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-22 15:48:14,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:48:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-22 15:48:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-22 15:48:14,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:14,869 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:14,869 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:14,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 141899638, now seen corresponding path program 30 times [2018-10-22 15:48:14,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:14,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:14,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:14,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:14,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 272 proven. 499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:15,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:15,542 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:15,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:15,773 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-22 15:48:15,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:15,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:16,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:16,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 55 [2018-10-22 15:48:16,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:48:16,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:48:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:48:16,442 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 55 states. [2018-10-22 15:48:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:17,983 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2018-10-22 15:48:17,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:48:17,984 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2018-10-22 15:48:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:17,985 INFO L225 Difference]: With dead ends: 118 [2018-10-22 15:48:17,985 INFO L226 Difference]: Without dead ends: 116 [2018-10-22 15:48:17,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1399, Invalid=6433, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:48:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-22 15:48:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2018-10-22 15:48:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-22 15:48:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-22 15:48:18,002 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2018-10-22 15:48:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:18,002 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-22 15:48:18,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:48:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-22 15:48:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-22 15:48:18,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:18,003 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:18,003 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:18,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash -597087617, now seen corresponding path program 31 times [2018-10-22 15:48:18,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:18,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:18,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:18,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 465 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:19,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:19,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:19,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:19,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:21,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:21,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 76 [2018-10-22 15:48:21,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-22 15:48:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-22 15:48:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=5095, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:48:21,703 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 76 states. [2018-10-22 15:48:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:25,270 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2018-10-22 15:48:25,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:48:25,271 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 108 [2018-10-22 15:48:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:25,272 INFO L225 Difference]: With dead ends: 186 [2018-10-22 15:48:25,272 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:48:25,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1093, Invalid=10679, Unknown=0, NotChecked=0, Total=11772 [2018-10-22 15:48:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:48:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-22 15:48:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-22 15:48:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-22 15:48:25,296 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-22 15:48:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:25,297 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-22 15:48:25,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-22 15:48:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-22 15:48:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-22 15:48:25,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:25,297 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:25,298 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:25,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2021399769, now seen corresponding path program 32 times [2018-10-22 15:48:25,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:25,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:25,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:25,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:25,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 306 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:25,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:25,986 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:26,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:26,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:26,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:27,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-22 15:48:27,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-22 15:48:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-22 15:48:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:48:27,169 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 58 states. [2018-10-22 15:48:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:28,544 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2018-10-22 15:48:28,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:48:28,546 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2018-10-22 15:48:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:28,546 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:48:28,546 INFO L226 Difference]: Without dead ends: 122 [2018-10-22 15:48:28,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1553, Invalid=7189, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:48:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-22 15:48:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2018-10-22 15:48:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-22 15:48:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-22 15:48:28,568 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-10-22 15:48:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:28,568 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-22 15:48:28,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-22 15:48:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-22 15:48:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-22 15:48:28,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:28,569 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:28,569 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:28,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2045290082, now seen corresponding path program 33 times [2018-10-22 15:48:28,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:28,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:28,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:28,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 528 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:30,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:30,232 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:30,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:30,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-22 15:48:30,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:30,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:31,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:31,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 81 [2018-10-22 15:48:31,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:48:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:48:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=5526, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:48:31,982 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 81 states. [2018-10-22 15:48:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:36,606 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2018-10-22 15:48:36,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:48:36,607 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 114 [2018-10-22 15:48:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:36,608 INFO L225 Difference]: With dead ends: 196 [2018-10-22 15:48:36,608 INFO L226 Difference]: Without dead ends: 117 [2018-10-22 15:48:36,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4552 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1580, Invalid=12462, Unknown=0, NotChecked=0, Total=14042 [2018-10-22 15:48:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-22 15:48:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-22 15:48:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-22 15:48:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-22 15:48:36,631 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-22 15:48:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:36,631 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-22 15:48:36,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:48:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-22 15:48:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-22 15:48:36,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:36,632 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:36,632 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:36,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2104421692, now seen corresponding path program 34 times [2018-10-22 15:48:36,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:36,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:36,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:36,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:36,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 342 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:37,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:37,374 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:37,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:37,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:37,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:37,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:38,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:38,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 62 [2018-10-22 15:48:38,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-22 15:48:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-22 15:48:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:48:38,264 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 62 states. [2018-10-22 15:48:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:40,001 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2018-10-22 15:48:40,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:48:40,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 116 [2018-10-22 15:48:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:40,002 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:48:40,002 INFO L226 Difference]: Without dead ends: 128 [2018-10-22 15:48:40,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1739, Invalid=8161, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:48:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-22 15:48:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2018-10-22 15:48:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-22 15:48:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-22 15:48:40,031 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-10-22 15:48:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:40,032 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-22 15:48:40,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-22 15:48:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-22 15:48:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-22 15:48:40,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:40,033 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:40,033 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:40,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash 778472773, now seen corresponding path program 35 times [2018-10-22 15:48:40,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:40,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:40,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:40,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 595 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:41,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:41,887 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:41,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:41,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-22 15:48:41,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:41,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:45,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:45,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 84 [2018-10-22 15:48:45,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-22 15:48:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-22 15:48:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=6227, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:48:45,061 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 84 states. [2018-10-22 15:48:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:49,694 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2018-10-22 15:48:49,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:48:49,695 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 120 [2018-10-22 15:48:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:49,696 INFO L225 Difference]: With dead ends: 206 [2018-10-22 15:48:49,696 INFO L226 Difference]: Without dead ends: 123 [2018-10-22 15:48:49,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1314, Invalid=13206, Unknown=0, NotChecked=0, Total=14520 [2018-10-22 15:48:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-22 15:48:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-22 15:48:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:48:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-22 15:48:49,723 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-22 15:48:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:49,724 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-22 15:48:49,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-22 15:48:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-22 15:48:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:48:49,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:49,724 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:49,724 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:49,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash -173094753, now seen corresponding path program 36 times [2018-10-22 15:48:49,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:49,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:49,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:49,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:49,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 380 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:50,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:50,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:50,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:50,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-22 15:48:50,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:50,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:51,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:51,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-22 15:48:51,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-22 15:48:51,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-22 15:48:51,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=3316, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:48:51,387 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 64 states. [2018-10-22 15:48:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:53,021 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2018-10-22 15:48:53,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:48:53,021 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 122 [2018-10-22 15:48:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:53,022 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:48:53,022 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:48:53,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1885, Invalid=8827, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:48:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:48:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2018-10-22 15:48:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-22 15:48:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-22 15:48:53,047 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-10-22 15:48:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:53,047 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-22 15:48:53,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-22 15:48:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-22 15:48:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-22 15:48:53,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:53,048 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:53,049 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:53,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2102132952, now seen corresponding path program 37 times [2018-10-22 15:48:53,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:53,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:53,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:53,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:53,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 666 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:55,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:55,115 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:55,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:55,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:57,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:57,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 88 [2018-10-22 15:48:57,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-22 15:48:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-22 15:48:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=6859, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:48:57,657 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 88 states. [2018-10-22 15:49:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:02,521 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2018-10-22 15:49:02,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:49:02,522 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 126 [2018-10-22 15:49:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:02,522 INFO L225 Difference]: With dead ends: 216 [2018-10-22 15:49:02,522 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:49:02,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1432, Invalid=14570, Unknown=0, NotChecked=0, Total=16002 [2018-10-22 15:49:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:49:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-22 15:49:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-22 15:49:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-22 15:49:02,556 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-22 15:49:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:02,556 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-22 15:49:02,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-22 15:49:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-22 15:49:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-22 15:49:02,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:02,557 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:02,557 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:02,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1553256194, now seen corresponding path program 38 times [2018-10-22 15:49:02,558 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:02,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:02,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 420 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:03,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:03,726 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:03,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:03,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:03,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:03,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 0 proven. 1203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:04,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:04,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 67 [2018-10-22 15:49:04,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:49:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:49:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:49:04,964 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 67 states. [2018-10-22 15:49:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:06,824 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2018-10-22 15:49:06,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:49:06,825 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2018-10-22 15:49:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:06,826 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:49:06,827 INFO L226 Difference]: Without dead ends: 140 [2018-10-22 15:49:06,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2063, Invalid=9709, Unknown=0, NotChecked=0, Total=11772 [2018-10-22 15:49:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-22 15:49:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2018-10-22 15:49:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:49:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-22 15:49:06,862 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2018-10-22 15:49:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:06,862 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-22 15:49:06,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:49:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-22 15:49:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-22 15:49:06,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:06,863 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:06,864 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:06,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:06,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1620712459, now seen corresponding path program 39 times [2018-10-22 15:49:06,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:06,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:06,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:06,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:06,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 741 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:08,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:08,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:08,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:49:08,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:08,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 0 proven. 1282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:10,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:10,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 72 [2018-10-22 15:49:10,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:49:10,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:49:10,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=4250, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:49:10,612 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 72 states. [2018-10-22 15:49:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:14,302 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2018-10-22 15:49:14,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:49:14,303 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 132 [2018-10-22 15:49:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:14,304 INFO L225 Difference]: With dead ends: 226 [2018-10-22 15:49:14,304 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:49:14,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1604, Invalid=11278, Unknown=0, NotChecked=0, Total=12882 [2018-10-22 15:49:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:49:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-22 15:49:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-22 15:49:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-22 15:49:14,334 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-22 15:49:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:14,334 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-22 15:49:14,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:49:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-22 15:49:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-22 15:49:14,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:14,335 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:14,335 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:14,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2005786523, now seen corresponding path program 40 times [2018-10-22 15:49:14,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:14,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:14,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:14,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:14,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 462 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:16,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:16,505 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:16,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:16,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:16,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:16,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:17,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:17,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 71 [2018-10-22 15:49:17,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:49:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:49:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=4091, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:49:17,685 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 71 states. [2018-10-22 15:49:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:19,580 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2018-10-22 15:49:19,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:49:19,581 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 134 [2018-10-22 15:49:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:19,584 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:49:19,584 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 15:49:19,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2276, Invalid=10834, Unknown=0, NotChecked=0, Total=13110 [2018-10-22 15:49:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 15:49:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2018-10-22 15:49:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-22 15:49:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-22 15:49:19,611 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-10-22 15:49:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:19,611 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-22 15:49:19,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:49:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-22 15:49:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-22 15:49:19,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:19,612 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:19,612 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:19,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -791018514, now seen corresponding path program 41 times [2018-10-22 15:49:19,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:19,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:19,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:19,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:19,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 820 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:22,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:22,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:22,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:22,141 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-22 15:49:22,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:22,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:25,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:25,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 96 [2018-10-22 15:49:25,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-22 15:49:25,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-22 15:49:25,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=8162, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:49:25,022 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 96 states. [2018-10-22 15:49:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:30,049 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2018-10-22 15:49:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:49:30,050 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 138 [2018-10-22 15:49:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:30,050 INFO L225 Difference]: With dead ends: 236 [2018-10-22 15:49:30,050 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:49:30,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4717 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1683, Invalid=17499, Unknown=0, NotChecked=0, Total=19182 [2018-10-22 15:49:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:49:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-22 15:49:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-22 15:49:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-22 15:49:30,079 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-22 15:49:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:30,079 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-22 15:49:30,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-22 15:49:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-22 15:49:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-22 15:49:30,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:30,080 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:30,080 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:30,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash -393225016, now seen corresponding path program 42 times [2018-10-22 15:49:30,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:30,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:30,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 506 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:31,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:31,865 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:31,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:31,953 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-22 15:49:31,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:31,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 0 proven. 1455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:33,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:33,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-22 15:49:33,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:49:33,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:49:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4330, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:49:33,162 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 73 states. [2018-10-22 15:49:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:35,106 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2018-10-22 15:49:35,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:49:35,106 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 140 [2018-10-22 15:49:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:35,107 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:49:35,107 INFO L226 Difference]: Without dead ends: 152 [2018-10-22 15:49:35,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2443, Invalid=11599, Unknown=0, NotChecked=0, Total=14042 [2018-10-22 15:49:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-22 15:49:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2018-10-22 15:49:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-22 15:49:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-22 15:49:35,147 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-10-22 15:49:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:35,147 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-22 15:49:35,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:49:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-22 15:49:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-22 15:49:35,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:35,148 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:35,148 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:35,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 959239889, now seen corresponding path program 43 times [2018-10-22 15:49:35,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:35,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:35,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 903 proven. 639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:37,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:37,597 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:37,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:37,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:42,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:42,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 100 [2018-10-22 15:49:42,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-22 15:49:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-22 15:49:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=8884, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:49:42,115 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 100 states. [2018-10-22 15:49:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:48,633 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2018-10-22 15:49:48,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:49:48,633 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 144 [2018-10-22 15:49:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:48,634 INFO L225 Difference]: With dead ends: 246 [2018-10-22 15:49:48,634 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:49:48,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1816, Invalid=19064, Unknown=0, NotChecked=0, Total=20880 [2018-10-22 15:49:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:49:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-22 15:49:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-22 15:49:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-22 15:49:48,663 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-22 15:49:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:48,664 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-22 15:49:48,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-22 15:49:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-22 15:49:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-22 15:49:48,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:48,664 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:48,664 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:48,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1127162923, now seen corresponding path program 44 times [2018-10-22 15:49:48,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:48,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:48,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:48,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 552 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:49,569 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:49,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:49,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:49,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:49,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 1590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:50,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:50,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-22 15:49:50,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-22 15:49:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-22 15:49:50,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=4698, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:49:50,929 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 76 states. [2018-10-22 15:49:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:53,258 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2018-10-22 15:49:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:49:53,258 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 146 [2018-10-22 15:49:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:53,259 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:49:53,259 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 15:49:53,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2645, Invalid=12607, Unknown=0, NotChecked=0, Total=15252 [2018-10-22 15:49:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 15:49:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2018-10-22 15:49:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-22 15:49:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-22 15:49:53,289 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-10-22 15:49:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:53,289 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-22 15:49:53,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-22 15:49:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-22 15:49:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-22 15:49:53,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:53,289 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:53,290 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:53,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash 440644788, now seen corresponding path program 45 times [2018-10-22 15:49:53,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:53,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:53,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:53,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:53,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 990 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:55,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:55,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:55,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-22 15:49:55,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:55,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:59,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:59,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 105 [2018-10-22 15:49:59,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:49:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:49:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=9297, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:49:59,549 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 105 states. [2018-10-22 15:50:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:05,297 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2018-10-22 15:50:05,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:50:05,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 150 [2018-10-22 15:50:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:05,299 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:50:05,299 INFO L226 Difference]: Without dead ends: 153 [2018-10-22 15:50:05,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8017 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2597, Invalid=21273, Unknown=0, NotChecked=0, Total=23870 [2018-10-22 15:50:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-22 15:50:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-22 15:50:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-22 15:50:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-22 15:50:05,335 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-22 15:50:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:05,335 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-22 15:50:05,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:50:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-22 15:50:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-22 15:50:05,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:05,337 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:05,337 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:05,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -209119602, now seen corresponding path program 46 times [2018-10-22 15:50:05,337 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:05,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 600 proven. 1131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:06,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:06,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:06,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:06,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:06,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:06,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:08,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:08,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 80 [2018-10-22 15:50:08,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-22 15:50:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-22 15:50:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=5210, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:50:08,178 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 80 states. [2018-10-22 15:50:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:10,569 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2018-10-22 15:50:10,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:50:10,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 152 [2018-10-22 15:50:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:10,571 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:50:10,571 INFO L226 Difference]: Without dead ends: 164 [2018-10-22 15:50:10,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2885, Invalid=13885, Unknown=0, NotChecked=0, Total=16770 [2018-10-22 15:50:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-22 15:50:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2018-10-22 15:50:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-22 15:50:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-22 15:50:10,613 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2018-10-22 15:50:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:10,613 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-22 15:50:10,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-22 15:50:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-22 15:50:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-22 15:50:10,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:10,614 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:10,614 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:10,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1304935831, now seen corresponding path program 47 times [2018-10-22 15:50:10,615 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:10,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:10,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:10,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:10,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 1081 proven. 745 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:13,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:13,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:13,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:13,478 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-22 15:50:13,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:13,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 1826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:17,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:17,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 108 [2018-10-22 15:50:17,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-22 15:50:17,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-22 15:50:17,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=10358, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:50:17,280 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 108 states. [2018-10-22 15:50:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:24,901 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2018-10-22 15:50:24,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:50:24,902 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 156 [2018-10-22 15:50:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:24,903 INFO L225 Difference]: With dead ends: 266 [2018-10-22 15:50:24,903 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:50:24,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6073 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2097, Invalid=22395, Unknown=0, NotChecked=0, Total=24492 [2018-10-22 15:50:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:50:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-22 15:50:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-22 15:50:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-22 15:50:24,938 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-22 15:50:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-22 15:50:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-22 15:50:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-22 15:50:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-22 15:50:24,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:24,940 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:24,940 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:24,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1479617551, now seen corresponding path program 48 times [2018-10-22 15:50:24,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:24,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:24,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:24,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 650 proven. 1228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:25,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:25,970 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:25,978 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:26,073 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-22 15:50:26,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:26,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:27,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-22 15:50:27,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-22 15:50:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-22 15:50:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=5479, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:50:27,648 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 82 states. [2018-10-22 15:50:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:30,205 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2018-10-22 15:50:30,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:50:30,206 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 158 [2018-10-22 15:50:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:30,207 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:50:30,208 INFO L226 Difference]: Without dead ends: 170 [2018-10-22 15:50:30,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3073, Invalid=14749, Unknown=0, NotChecked=0, Total=17822 [2018-10-22 15:50:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-22 15:50:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2018-10-22 15:50:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-22 15:50:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-22 15:50:30,245 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-10-22 15:50:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:30,245 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-22 15:50:30,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-22 15:50:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-22 15:50:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-22 15:50:30,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:30,246 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:30,246 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:30,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1000730246, now seen corresponding path program 49 times [2018-10-22 15:50:30,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:30,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:30,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:30,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 1176 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:33,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:33,018 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:33,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:37,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:37,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 112 [2018-10-22 15:50:37,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-22 15:50:37,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-22 15:50:37,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1262, Invalid=11170, Unknown=0, NotChecked=0, Total=12432 [2018-10-22 15:50:37,631 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 112 states. [2018-10-22 15:50:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,345 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2018-10-22 15:50:45,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:50:45,345 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 162 [2018-10-22 15:50:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,347 INFO L225 Difference]: With dead ends: 276 [2018-10-22 15:50:45,347 INFO L226 Difference]: Without dead ends: 165 [2018-10-22 15:50:45,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6563 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2245, Invalid=24161, Unknown=0, NotChecked=0, Total=26406 [2018-10-22 15:50:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-22 15:50:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-22 15:50:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-22 15:50:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-22 15:50:45,384 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-22 15:50:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,384 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-22 15:50:45,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-22 15:50:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-22 15:50:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-22 15:50:45,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,386 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,386 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1624671148, now seen corresponding path program 50 times [2018-10-22 15:50:45,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:45,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 702 proven. 1329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,486 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:46,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:46,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:46,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 0 proven. 2031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 85 [2018-10-22 15:50:48,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:50:48,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:50:48,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=5892, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:50:48,332 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 85 states. [2018-10-22 15:50:51,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,166 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2018-10-22 15:50:51,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:50:51,166 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 164 [2018-10-22 15:50:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,167 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:50:51,167 INFO L226 Difference]: Without dead ends: 176 [2018-10-22 15:50:51,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3299, Invalid=15883, Unknown=0, NotChecked=0, Total=19182 [2018-10-22 15:50:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-22 15:50:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-10-22 15:50:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-22 15:50:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-22 15:50:51,206 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-10-22 15:50:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,206 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-22 15:50:51,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:50:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-22 15:50:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-22 15:50:51,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,207 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,207 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1013723043, now seen corresponding path program 51 times [2018-10-22 15:50:51,207 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:51,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 1275 proven. 859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:54,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:54,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:50:54,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-22 15:50:54,918 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:50:55,118 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:55,119 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:50:55,124 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:50:55,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:50:55 BoogieIcfgContainer [2018-10-22 15:50:55,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:50:55,125 INFO L168 Benchmark]: Toolchain (without parser) took 240869.22 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 717.8 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -465.2 MB). Peak memory consumption was 252.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:55,127 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:50:55,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:55,127 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:50:55,128 INFO L168 Benchmark]: Boogie Preprocessor took 26.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:50:55,128 INFO L168 Benchmark]: RCFGBuilder took 386.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:55,129 INFO L168 Benchmark]: TraceAbstraction took 240116.14 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -9.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 301.5 MB). Peak memory consumption was 292.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:55,132 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 292.65 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 41.89 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 26.06 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 386.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240116.14 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -9.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 301.5 MB). Peak memory consumption was 292.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 169 with TraceHistMax 28,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 74 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 239.9s OverallTime, 55 OverallIterations, 28 TraceHistogramMax, 111.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1442 SDtfs, 12115 SDslu, 43206 SDs, 0 SdLazy, 77187 SolverSat, 10242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7708 GetRequests, 3505 SyntacticMatches, 2 SemanticMatches, 4201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111050 ImplicationChecksByTransitivity, 158.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 182 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 116.9s InterpolantComputationTime, 9171 NumberOfCodeBlocks, 9171 NumberOfCodeBlocksAsserted, 472 NumberOfCheckSat, 9065 ConstructedInterpolants, 0 QuantifiedInterpolants, 11208618 SizeOfPredicates, 300 NumberOfNonLiveVariables, 12714 ConjunctsInSsa, 2986 ConjunctsInUnsatCore, 106 InterpolantComputations, 2 PerfectInterpolantSequences, 16652/73216 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown