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-acceleration/array_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:41:37,664 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:41:37,666 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:41:37,682 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:41:37,682 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:41:37,683 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:41:37,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:41:37,687 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:41:37,688 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:41:37,690 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:41:37,693 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:41:37,693 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:41:37,694 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:41:37,695 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:41:37,696 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:41:37,705 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:41:37,705 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:41:37,708 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:41:37,713 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:41:37,714 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:41:37,716 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:41:37,718 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:41:37,723 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:41:37,733 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 15:41:37,747 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:41:37,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:41:37,748 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:41:37,748 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:41:37,749 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:41:37,749 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:41:37,749 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:41:37,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:41:37,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:41:37,751 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:41:37,751 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:41:37,751 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:41:37,751 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:41:37,751 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:41:37,752 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:41:37,752 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:41:37,752 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:41:37,752 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:41:37,752 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:41:37,753 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:41:37,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:41:37,753 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:41:37,753 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:41:37,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:41:37,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:41:37,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:41:37,821 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:41:37,821 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:41:37,822 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call2_true-termination.i [2018-10-22 15:41:37,885 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caf3f7fef/0bbac751818640b3b729e57c7a781940/FLAG69af7f179 [2018-10-22 15:41:38,385 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:41:38,385 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call2_true-termination.i [2018-10-22 15:41:38,391 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caf3f7fef/0bbac751818640b3b729e57c7a781940/FLAG69af7f179 [2018-10-22 15:41:38,404 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caf3f7fef/0bbac751818640b3b729e57c7a781940 [2018-10-22 15:41:38,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:41:38,415 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:41:38,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:41:38,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:41:38,421 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:41:38,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2419bfab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38, skipping insertion in model container [2018-10-22 15:41:38,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:41:38,452 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:41:38,618 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:41:38,622 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:41:38,643 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:41:38,663 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:41:38,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38 WrapperNode [2018-10-22 15:41:38,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:41:38,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:41:38,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:41:38,665 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:41:38,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:41:38,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:41:38,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:41:38,705 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:41:38,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (1/1) ... [2018-10-22 15:41:38,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:41:38,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:41:38,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:41:38,730 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:41:38,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (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 15:41:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-22 15:41:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:41:38,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:41:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-22 15:41:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-22 15:41:39,293 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:41:39,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:41:39 BoogieIcfgContainer [2018-10-22 15:41:39,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:41:39,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:41:39,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:41:39,298 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:41:39,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:41:38" (1/3) ... [2018-10-22 15:41:39,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6e571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:41:39, skipping insertion in model container [2018-10-22 15:41:39,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:41:38" (2/3) ... [2018-10-22 15:41:39,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6e571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:41:39, skipping insertion in model container [2018-10-22 15:41:39,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:41:39" (3/3) ... [2018-10-22 15:41:39,302 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call2_true-termination.i [2018-10-22 15:41:39,310 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:41:39,318 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:41:39,335 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:41:39,367 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:41:39,368 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:41:39,368 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:41:39,368 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:41:39,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:41:39,368 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:41:39,369 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:41:39,369 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:41:39,369 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:41:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-22 15:41:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:41:39,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:39,390 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:39,392 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:39,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2021094374, now seen corresponding path program 1 times [2018-10-22 15:41:39,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:39,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:39,518 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 15:41:39,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:41:39,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:41:39,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:41:39,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:41:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:41:39,541 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-22 15:41:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:39,558 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-22 15:41:39,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:41:39,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:41:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:39,573 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:41:39,573 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:41:39,577 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 15:41:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:41:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:41:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:41:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 15:41:39,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2018-10-22 15:41:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:39,610 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 15:41:39,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:41:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 15:41:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:41:39,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:39,611 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:39,612 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:39,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1064529813, now seen corresponding path program 1 times [2018-10-22 15:41:39,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:39,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:39,675 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 15:41:39,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:41:39,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:41:39,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:41:39,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:41:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:41:39,678 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-10-22 15:41:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:39,728 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 15:41:39,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:41:39,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 15:41:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:39,729 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:41:39,729 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:41:39,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:41:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:41:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-22 15:41:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:41:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 15:41:39,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-10-22 15:41:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:39,735 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 15:41:39,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:41:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 15:41:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:41:39,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:39,736 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:39,737 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:39,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash 55281387, now seen corresponding path program 1 times [2018-10-22 15:41:39,737 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:39,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:39,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:39,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:39,827 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 15:41:39,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:39,828 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 15:41:39,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:39,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:39,920 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 15:41:39,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:39,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-22 15:41:39,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:41:39,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:41:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:41:39,950 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-22 15:41:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:40,055 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-22 15:41:40,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:41:40,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-22 15:41:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:40,058 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:41:40,058 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:41:40,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:41:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:41:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-10-22 15:41:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:41:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 15:41:40,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-10-22 15:41:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:40,064 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 15:41:40,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:41:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 15:41:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:41:40,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:40,065 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:40,066 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:40,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1196780203, now seen corresponding path program 2 times [2018-10-22 15:41:40,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:40,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:40,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:40,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:40,221 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 15:41:40,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:40,222 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 15:41:40,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:40,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:40,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:40,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:40,395 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 15:41:40,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:40,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-22 15:41:40,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:41:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:41:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:41:40,436 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2018-10-22 15:41:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:40,633 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:41:40,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:41:40,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-22 15:41:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:40,635 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:41:40,635 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:41:40,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:41:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:41:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-22 15:41:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:41:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-22 15:41:40,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-10-22 15:41:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:40,640 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-22 15:41:40,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:41:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-22 15:41:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:41:40,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:40,642 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:40,642 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:40,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 526776619, now seen corresponding path program 3 times [2018-10-22 15:41:40,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:40,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:40,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:40,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:40,778 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 15:41:40,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:40,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:41:40,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:40,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:40,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:40,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:41:40,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:41:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:41:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:41:40,931 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 7 states. [2018-10-22 15:41:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:41,023 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-22 15:41:41,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:41:41,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-22 15:41:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:41,025 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:41:41,025 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:41:41,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:41:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:41:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-22 15:41:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:41:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-22 15:41:41,031 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-10-22 15:41:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:41,031 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-22 15:41:41,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:41:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-22 15:41:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:41:41,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:41,033 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:41,033 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:41,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 310217493, now seen corresponding path program 4 times [2018-10-22 15:41:41,034 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:41,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:41,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:41,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:41,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:41,143 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 15:41:41,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:41,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:41,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:41,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:41,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:41,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-22 15:41:41,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:41:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:41:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:41:41,238 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2018-10-22 15:41:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:41,329 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-22 15:41:41,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:41:41,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-22 15:41:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:41,332 INFO L225 Difference]: With dead ends: 47 [2018-10-22 15:41:41,332 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:41:41,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:41:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:41:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-22 15:41:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:41:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:41:41,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-10-22 15:41:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:41,338 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:41:41,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:41:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:41:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:41:41,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:41,340 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:41,340 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:41,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1942395755, now seen corresponding path program 5 times [2018-10-22 15:41:41,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:41,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:41,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:41,490 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 15:41:41,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:41,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:41:41,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:41,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:41,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:41,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-22 15:41:41,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:41:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:41:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:41:41,639 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 9 states. [2018-10-22 15:41:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:41,802 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:41:41,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:41:41,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-22 15:41:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:41,804 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:41:41,805 INFO L226 Difference]: Without dead ends: 46 [2018-10-22 15:41:41,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:41:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-22 15:41:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-10-22 15:41:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:41:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-22 15:41:41,818 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2018-10-22 15:41:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:41,818 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-22 15:41:41,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:41:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-22 15:41:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:41:41,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:41,822 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:41,823 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:41,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1483231445, now seen corresponding path program 6 times [2018-10-22 15:41:41,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:41,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:41,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:41,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:42,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:42,135 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 15:41:42,147 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:42,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:41:42,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:42,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:42,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:42,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-22 15:41:42,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:41:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:41:42,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:41:42,286 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 10 states. [2018-10-22 15:41:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:42,429 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-22 15:41:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:41:42,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-10-22 15:41:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:42,431 INFO L225 Difference]: With dead ends: 57 [2018-10-22 15:41:42,431 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:41:42,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:41:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:41:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-10-22 15:41:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:41:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-22 15:41:42,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2018-10-22 15:41:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:42,437 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-22 15:41:42,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:41:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-22 15:41:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:41:42,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:42,439 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:42,440 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:42,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1032753749, now seen corresponding path program 7 times [2018-10-22 15:41:42,440 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:42,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:42,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:42,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:42,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:42,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:42,783 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 15:41:42,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:42,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:42,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:42,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-22 15:41:42,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:41:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:41:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:41:42,984 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 11 states. [2018-10-22 15:41:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:43,190 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-22 15:41:43,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:41:43,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-10-22 15:41:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:43,194 INFO L225 Difference]: With dead ends: 62 [2018-10-22 15:41:43,194 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:41:43,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:41:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:41:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-10-22 15:41:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:41:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:41:43,204 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2018-10-22 15:41:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:43,204 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:41:43,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:41:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:41:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:41:43,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:43,215 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:43,215 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:43,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1793517205, now seen corresponding path program 8 times [2018-10-22 15:41:43,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:43,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:43,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:43,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:43,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:43,406 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 15:41:43,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:43,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:43,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:43,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:43,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:43,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-22 15:41:43,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:41:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:41:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:41:43,544 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 12 states. [2018-10-22 15:41:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:43,896 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:41:43,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:41:43,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-22 15:41:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:43,899 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:41:43,899 INFO L226 Difference]: Without dead ends: 61 [2018-10-22 15:41:43,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:41:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-22 15:41:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-10-22 15:41:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:41:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-22 15:41:43,906 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2018-10-22 15:41:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:43,906 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-22 15:41:43,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:41:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-22 15:41:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-22 15:41:43,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:43,908 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:43,908 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:43,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:43,908 INFO L82 PathProgramCache]: Analyzing trace with hash 409628651, now seen corresponding path program 9 times [2018-10-22 15:41:43,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:43,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:43,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:43,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:44,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:44,198 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 15:41:44,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:44,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:41:44,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:44,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:44,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:44,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-22 15:41:44,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:41:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:41:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:41:44,357 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-10-22 15:41:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:44,480 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-22 15:41:44,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:41:44,481 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-10-22 15:41:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:44,482 INFO L225 Difference]: With dead ends: 72 [2018-10-22 15:41:44,482 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:41:44,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:41:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:41:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-22 15:41:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 15:41:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-22 15:41:44,494 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2018-10-22 15:41:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:44,495 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-22 15:41:44,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:41:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-22 15:41:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:41:44,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:44,496 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:44,497 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:44,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1082831787, now seen corresponding path program 10 times [2018-10-22 15:41:44,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:44,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:44,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:44,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:44,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:44,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:44,802 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 15:41:44,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:44,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:44,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:44,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:44,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:44,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-22 15:41:44,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:41:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:41:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:44,944 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 14 states. [2018-10-22 15:41:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:45,090 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-22 15:41:45,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:41:45,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-10-22 15:41:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:45,092 INFO L225 Difference]: With dead ends: 77 [2018-10-22 15:41:45,092 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:41:45,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:41:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-10-22 15:41:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:41:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:41:45,101 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2018-10-22 15:41:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:45,101 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:41:45,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:41:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:41:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:41:45,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:45,103 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:45,103 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:45,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 230007339, now seen corresponding path program 11 times [2018-10-22 15:41:45,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:45,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:45,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:45,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:45,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:45,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:45,323 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 15:41:45,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:45,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:41:45,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:45,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:45,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:45,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-22 15:41:45,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:41:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:41:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:45,488 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 15 states. [2018-10-22 15:41:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:45,615 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:41:45,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:41:45,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-10-22 15:41:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:45,616 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:41:45,617 INFO L226 Difference]: Without dead ends: 76 [2018-10-22 15:41:45,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-22 15:41:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-10-22 15:41:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 15:41:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-22 15:41:45,623 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2018-10-22 15:41:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:45,624 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-22 15:41:45,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:41:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-22 15:41:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-22 15:41:45,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:45,625 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:45,625 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:45,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 546275861, now seen corresponding path program 12 times [2018-10-22 15:41:45,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:45,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:45,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:45,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:45,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:46,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:46,701 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 15:41:46,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:46,986 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:41:46,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:46,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:47,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:47,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-22 15:41:47,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:41:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:41:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:47,069 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 16 states. [2018-10-22 15:41:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:47,264 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-22 15:41:47,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:41:47,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-10-22 15:41:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:47,265 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:41:47,266 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:41:47,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:41:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-10-22 15:41:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:41:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-22 15:41:47,272 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2018-10-22 15:41:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:47,272 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-22 15:41:47,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:41:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-22 15:41:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:41:47,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:47,274 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:47,274 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:47,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash 89588843, now seen corresponding path program 13 times [2018-10-22 15:41:47,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:47,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:47,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:47,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:47,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:47,651 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 15:41:47,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:47,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:47,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:47,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-22 15:41:47,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:41:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:41:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:47,774 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 17 states. [2018-10-22 15:41:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:48,154 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-22 15:41:48,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:41:48,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-10-22 15:41:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:48,155 INFO L225 Difference]: With dead ends: 92 [2018-10-22 15:41:48,155 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:41:48,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:41:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-22 15:41:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:41:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:41:48,163 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2018-10-22 15:41:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:48,163 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:41:48,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:41:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:41:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:41:48,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:48,165 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:48,165 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:48,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1840351189, now seen corresponding path program 14 times [2018-10-22 15:41:48,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:48,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:48,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:48,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:48,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:48,499 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 15:41:48,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:48,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:48,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:48,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:48,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:48,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-22 15:41:48,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:41:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:41:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:48,602 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 18 states. [2018-10-22 15:41:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:48,722 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:41:48,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:41:48,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-22 15:41:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:48,724 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:41:48,724 INFO L226 Difference]: Without dead ends: 91 [2018-10-22 15:41:48,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-22 15:41:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-10-22 15:41:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:41:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-22 15:41:48,729 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2018-10-22 15:41:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-22 15:41:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:41:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-22 15:41:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:41:48,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:48,731 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:48,731 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:48,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1834129067, now seen corresponding path program 15 times [2018-10-22 15:41:48,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:48,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:48,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:48,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:49,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:49,032 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 15:41:49,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:49,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:41:49,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:49,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:49,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:49,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-22 15:41:49,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:41:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:41:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:49,301 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-10-22 15:41:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:49,671 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-22 15:41:49,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:41:49,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-10-22 15:41:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:49,673 INFO L225 Difference]: With dead ends: 102 [2018-10-22 15:41:49,673 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:41:49,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:41:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-10-22 15:41:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-22 15:41:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-22 15:41:49,678 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2018-10-22 15:41:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:49,678 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-22 15:41:49,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:41:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-22 15:41:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:41:49,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:49,679 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:49,680 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:49,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:49,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1532452245, now seen corresponding path program 16 times [2018-10-22 15:41:49,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:49,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:49,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:49,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:49,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:50,005 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 15:41:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:50,091 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:50,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:50,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:50,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-22 15:41:50,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:41:50,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:41:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:41:50,170 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 20 states. [2018-10-22 15:41:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:50,317 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-22 15:41:50,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:41:50,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-10-22 15:41:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:50,319 INFO L225 Difference]: With dead ends: 107 [2018-10-22 15:41:50,319 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:41:50,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:41:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:41:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2018-10-22 15:41:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:41:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-22 15:41:50,324 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2018-10-22 15:41:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:50,324 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-22 15:41:50,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:41:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-22 15:41:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:41:50,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:50,325 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:50,326 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:50,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash -22259477, now seen corresponding path program 17 times [2018-10-22 15:41:50,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:50,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:50,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:50,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:50,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:50,712 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 15:41:50,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:50,923 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:41:50,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:50,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:50,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-22 15:41:50,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:41:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:41:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:41:50,975 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 21 states. [2018-10-22 15:41:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:51,134 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:41:51,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:41:51,135 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-10-22 15:41:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:51,136 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:41:51,136 INFO L226 Difference]: Without dead ends: 106 [2018-10-22 15:41:51,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:41:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-22 15:41:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-22 15:41:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 15:41:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-22 15:41:51,141 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2018-10-22 15:41:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:51,141 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-22 15:41:51,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:41:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-22 15:41:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-22 15:41:51,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:51,142 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:51,143 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:51,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:51,143 INFO L82 PathProgramCache]: Analyzing trace with hash 855442261, now seen corresponding path program 18 times [2018-10-22 15:41:51,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:51,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:51,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:51,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:51,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:51,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:51,516 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 15:41:51,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:52,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:41:52,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:52,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:52,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:52,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-22 15:41:52,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:41:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:41:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:41:52,732 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 22 states. [2018-10-22 15:41:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:53,089 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-22 15:41:53,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:41:53,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-10-22 15:41:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:53,091 INFO L225 Difference]: With dead ends: 117 [2018-10-22 15:41:53,091 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:41:53,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:41:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:41:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2018-10-22 15:41:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:41:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-22 15:41:53,095 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2018-10-22 15:41:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:53,096 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-22 15:41:53,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:41:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-22 15:41:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:41:53,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:53,096 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:53,097 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:53,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash -43496661, now seen corresponding path program 19 times [2018-10-22 15:41:53,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:53,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:53,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:53,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:53,587 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 15:41:53,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:53,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:53,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:53,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-22 15:41:53,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:41:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:41:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:41:53,737 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 23 states. [2018-10-22 15:41:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:53,884 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-22 15:41:53,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:41:53,884 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-22 15:41:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:53,886 INFO L225 Difference]: With dead ends: 122 [2018-10-22 15:41:53,886 INFO L226 Difference]: Without dead ends: 116 [2018-10-22 15:41:53,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:41:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-22 15:41:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2018-10-22 15:41:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:41:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-22 15:41:53,891 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2018-10-22 15:41:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:53,891 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-22 15:41:53,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:41:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-22 15:41:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:41:53,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:53,892 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:53,892 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:53,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1826719467, now seen corresponding path program 20 times [2018-10-22 15:41:53,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:53,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:53,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:53,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:53,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:54,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:54,315 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 15:41:54,324 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:54,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:54,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:54,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:54,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:54,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-22 15:41:54,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:41:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:41:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:41:54,461 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 24 states. [2018-10-22 15:41:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:54,624 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:41:54,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:41:54,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2018-10-22 15:41:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:54,628 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:41:54,628 INFO L226 Difference]: Without dead ends: 121 [2018-10-22 15:41:54,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:41:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-22 15:41:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-10-22 15:41:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:41:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-22 15:41:54,632 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2018-10-22 15:41:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:54,633 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-22 15:41:54,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:41:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-22 15:41:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:41:54,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:54,634 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:54,634 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:54,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:54,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2022337899, now seen corresponding path program 21 times [2018-10-22 15:41:54,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:54,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:54,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:54,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:55,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:55,366 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 15:41:55,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:55,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:41:55,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:55,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:56,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:56,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-22 15:41:56,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:41:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:41:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:41:56,053 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-10-22 15:41:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:56,293 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-22 15:41:56,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:41:56,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2018-10-22 15:41:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:56,296 INFO L225 Difference]: With dead ends: 132 [2018-10-22 15:41:56,296 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:41:56,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:41:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:41:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2018-10-22 15:41:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:41:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-22 15:41:56,300 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2018-10-22 15:41:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:56,300 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-22 15:41:56,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:41:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-22 15:41:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:41:56,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:56,301 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:56,302 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:56,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 792182485, now seen corresponding path program 22 times [2018-10-22 15:41:56,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:56,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:56,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:56,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:56,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:56,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:56,607 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 15:41:56,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:56,712 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:56,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:56,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:56,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:56,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-22 15:41:56,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:41:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:41:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:41:56,763 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 26 states. [2018-10-22 15:41:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:56,955 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-22 15:41:56,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:41:56,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2018-10-22 15:41:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:56,957 INFO L225 Difference]: With dead ends: 137 [2018-10-22 15:41:56,957 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:41:56,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:41:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:41:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2018-10-22 15:41:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:41:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-22 15:41:56,961 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2018-10-22 15:41:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:56,962 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-22 15:41:56,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:41:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-22 15:41:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:41:56,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:56,963 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:56,963 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:56,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1978220629, now seen corresponding path program 23 times [2018-10-22 15:41:56,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:56,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:56,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:56,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:56,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:57,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:57,355 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 15:41:57,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:57,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:41:57,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:57,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:57,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:57,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-22 15:41:57,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:41:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:41:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:41:57,813 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 27 states. [2018-10-22 15:41:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:57,994 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:41:57,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:41:57,995 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2018-10-22 15:41:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:57,996 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:41:57,996 INFO L226 Difference]: Without dead ends: 136 [2018-10-22 15:41:57,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:41:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-22 15:41:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2018-10-22 15:41:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:41:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-22 15:41:58,001 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2018-10-22 15:41:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:58,002 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-22 15:41:58,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:41:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-22 15:41:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-22 15:41:58,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:58,003 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:58,003 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:58,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1882925931, now seen corresponding path program 24 times [2018-10-22 15:41:58,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:58,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:58,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:58,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:58,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:58,869 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 15:41:58,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:07,700 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:42:07,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:07,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:07,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:07,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-22 15:42:07,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:42:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:42:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:07,781 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 28 states. [2018-10-22 15:42:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:08,109 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-22 15:42:08,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:42:08,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2018-10-22 15:42:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:08,111 INFO L225 Difference]: With dead ends: 147 [2018-10-22 15:42:08,111 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:42:08,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:42:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2018-10-22 15:42:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:42:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-22 15:42:08,117 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2018-10-22 15:42:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:08,117 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-22 15:42:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:42:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-22 15:42:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:42:08,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:08,119 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:08,119 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:08,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1760476693, now seen corresponding path program 25 times [2018-10-22 15:42:08,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:08,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:08,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:08,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:08,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:09,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:09,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:42:09,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:09,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:09,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:09,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-22 15:42:09,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:42:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:42:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:42:09,266 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 29 states. [2018-10-22 15:42:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:09,422 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-22 15:42:09,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:42:09,423 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2018-10-22 15:42:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:09,424 INFO L225 Difference]: With dead ends: 152 [2018-10-22 15:42:09,424 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 15:42:09,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:42:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 15:42:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2018-10-22 15:42:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:42:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-22 15:42:09,429 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2018-10-22 15:42:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:09,429 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-22 15:42:09,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:42:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-22 15:42:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:42:09,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:09,430 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:09,430 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:09,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash -767444395, now seen corresponding path program 26 times [2018-10-22 15:42:09,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:09,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:09,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:10,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:10,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:42:10,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:10,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:10,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:10,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:10,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:10,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-22 15:42:10,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:42:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:42:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:42:10,721 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 30 states. [2018-10-22 15:42:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:11,191 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:42:11,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:42:11,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2018-10-22 15:42:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:11,194 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:42:11,194 INFO L226 Difference]: Without dead ends: 151 [2018-10-22 15:42:11,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:42:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-22 15:42:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2018-10-22 15:42:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-22 15:42:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-22 15:42:11,198 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2018-10-22 15:42:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:11,199 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-22 15:42:11,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:42:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-22 15:42:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-22 15:42:11,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:11,200 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:11,200 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:11,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1887570901, now seen corresponding path program 27 times [2018-10-22 15:42:11,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:11,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:11,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:11,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:11,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:13,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:13,099 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:42:13,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:19,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:42:19,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:19,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:19,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:19,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-22 15:42:19,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:42:19,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:42:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:42:19,903 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-10-22 15:42:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:20,073 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-22 15:42:20,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:42:20,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2018-10-22 15:42:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:20,075 INFO L225 Difference]: With dead ends: 162 [2018-10-22 15:42:20,075 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:42:20,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:42:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:42:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-10-22 15:42:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-22 15:42:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-22 15:42:20,080 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2018-10-22 15:42:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:20,081 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-22 15:42:20,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:42:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-22 15:42:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-22 15:42:20,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:20,082 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:20,082 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:20,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:20,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1764388885, now seen corresponding path program 28 times [2018-10-22 15:42:20,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:20,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:20,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:20,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:20,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:21,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:21,670 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 15:42:21,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:21,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:21,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:21,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:21,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:21,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-22 15:42:21,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:42:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:42:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:42:21,876 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 32 states. [2018-10-22 15:42:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:22,072 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-22 15:42:22,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:42:22,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2018-10-22 15:42:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:22,074 INFO L225 Difference]: With dead ends: 167 [2018-10-22 15:42:22,074 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:42:22,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:42:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:42:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-10-22 15:42:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:42:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-22 15:42:22,079 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2018-10-22 15:42:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:22,080 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-22 15:42:22,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:42:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-22 15:42:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:42:22,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:22,081 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:22,081 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:22,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 778098283, now seen corresponding path program 29 times [2018-10-22 15:42:22,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:22,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:22,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:22,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:22,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:23,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:23,479 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 15:42:23,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:27,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:42:27,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:27,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:27,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:27,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-22 15:42:27,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:42:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:42:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:42:27,390 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 33 states. [2018-10-22 15:42:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:28,388 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-22 15:42:28,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:42:28,388 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2018-10-22 15:42:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:28,390 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:42:28,390 INFO L226 Difference]: Without dead ends: 166 [2018-10-22 15:42:28,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:42:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-22 15:42:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2018-10-22 15:42:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-22 15:42:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-22 15:42:28,395 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2018-10-22 15:42:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-22 15:42:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:42:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-22 15:42:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-22 15:42:28,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:28,397 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:28,397 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:28,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash -604310059, now seen corresponding path program 30 times [2018-10-22 15:42:28,398 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:28,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:28,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:28,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:29,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:29,276 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 15:42:29,283 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:54,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:42:54,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:54,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:54,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:54,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-22 15:42:54,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:42:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:42:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:42:54,999 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 34 states. [2018-10-22 15:42:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:55,318 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-22 15:42:55,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:42:55,319 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2018-10-22 15:42:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:55,320 INFO L225 Difference]: With dead ends: 177 [2018-10-22 15:42:55,321 INFO L226 Difference]: Without dead ends: 171 [2018-10-22 15:42:55,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:42:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-22 15:42:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2018-10-22 15:42:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-22 15:42:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-22 15:42:55,327 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2018-10-22 15:42:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:55,327 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-22 15:42:55,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:42:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-22 15:42:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-22 15:42:55,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:55,328 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:55,328 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:55,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash 968747179, now seen corresponding path program 31 times [2018-10-22 15:42:55,329 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:55,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:55,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:55,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:55,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:55,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:55,909 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 15:42:55,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:56,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:56,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:56,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-22 15:42:56,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:42:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:42:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:42:56,108 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 35 states. [2018-10-22 15:42:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:57,161 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-22 15:42:57,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:42:57,161 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-10-22 15:42:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:57,162 INFO L225 Difference]: With dead ends: 182 [2018-10-22 15:42:57,162 INFO L226 Difference]: Without dead ends: 176 [2018-10-22 15:42:57,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:42:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-22 15:42:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2018-10-22 15:42:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:42:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-22 15:42:57,166 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2018-10-22 15:42:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:57,167 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-22 15:42:57,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:42:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-22 15:42:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:42:57,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:57,170 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:57,170 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:57,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2026943595, now seen corresponding path program 32 times [2018-10-22 15:42:57,170 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:57,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:57,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:57,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:57,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:57,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:57,741 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 15:42:57,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:57,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:57,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:57,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:57,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:57,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-22 15:42:57,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:42:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:42:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:42:57,965 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 36 states. [2018-10-22 15:42:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:58,210 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-22 15:42:58,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:42:58,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 172 [2018-10-22 15:42:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:58,212 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:42:58,212 INFO L226 Difference]: Without dead ends: 181 [2018-10-22 15:42:58,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:42:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-22 15:42:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2018-10-22 15:42:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-22 15:42:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-22 15:42:58,217 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2018-10-22 15:42:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:58,218 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-22 15:42:58,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:42:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-22 15:42:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-22 15:42:58,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:58,219 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:58,219 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:58,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1030149397, now seen corresponding path program 33 times [2018-10-22 15:42:58,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:58,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:58,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:58,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:58,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:58,916 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 15:42:58,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:17,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:43:17,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:17,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:17,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:17,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-22 15:43:17,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:43:17,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:43:17,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:43:17,512 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-10-22 15:43:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:17,804 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-22 15:43:17,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:43:17,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2018-10-22 15:43:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:17,807 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:43:17,807 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:43:17,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:43:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:43:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-10-22 15:43:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-22 15:43:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-22 15:43:17,812 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2018-10-22 15:43:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:17,812 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-22 15:43:17,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:43:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-22 15:43:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-22 15:43:17,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:17,814 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:17,814 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:17,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1547923797, now seen corresponding path program 34 times [2018-10-22 15:43:17,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:17,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:17,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:17,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:17,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:18,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:18,826 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 15:43:18,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:43:19,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:43:19,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:19,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:19,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:19,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-22 15:43:19,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:43:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:43:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:43:19,209 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 38 states. [2018-10-22 15:43:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:19,471 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-22 15:43:19,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:43:19,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 182 [2018-10-22 15:43:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:19,474 INFO L225 Difference]: With dead ends: 197 [2018-10-22 15:43:19,474 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:43:19,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:43:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:43:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-10-22 15:43:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-22 15:43:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-22 15:43:19,479 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2018-10-22 15:43:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:19,479 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-22 15:43:19,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:43:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-22 15:43:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-22 15:43:19,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:19,480 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:19,480 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:19,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1693883691, now seen corresponding path program 35 times [2018-10-22 15:43:19,481 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:19,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:19,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:19,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:19,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:20,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:20,111 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 15:43:20,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:43:22,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:43:22,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:22,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:22,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:22,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-22 15:43:22,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:43:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:43:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:43:22,631 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 39 states. [2018-10-22 15:43:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:22,953 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-22 15:43:22,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:43:22,954 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 187 [2018-10-22 15:43:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:22,955 INFO L225 Difference]: With dead ends: 202 [2018-10-22 15:43:22,955 INFO L226 Difference]: Without dead ends: 196 [2018-10-22 15:43:22,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:43:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-22 15:43:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-10-22 15:43:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-22 15:43:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-22 15:43:22,960 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2018-10-22 15:43:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:22,960 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-22 15:43:22,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:43:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-22 15:43:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-22 15:43:22,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:22,962 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:22,962 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:22,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1582078187, now seen corresponding path program 36 times [2018-10-22 15:43:22,962 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:22,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:22,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:22,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:22,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:23,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:23,800 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:43:23,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:44:45,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:44:45,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:45,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:45,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:45,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-22 15:44:45,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:44:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:44:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:44:45,346 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 40 states. [2018-10-22 15:44:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:45,964 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-22 15:44:45,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:44:45,965 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2018-10-22 15:44:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:45,966 INFO L225 Difference]: With dead ends: 207 [2018-10-22 15:44:45,966 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:44:45,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:44:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:44:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-10-22 15:44:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-22 15:44:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-22 15:44:45,970 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2018-10-22 15:44:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:45,971 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-22 15:44:45,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:44:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-22 15:44:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:44:45,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:45,972 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:45,972 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:45,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2015740053, now seen corresponding path program 37 times [2018-10-22 15:44:45,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:45,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:45,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:45,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:45,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:46,757 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 15:44:46,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:46,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:46,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-22 15:44:46,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:44:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:44:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:44:46,942 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 41 states. [2018-10-22 15:44:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:47,378 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-10-22 15:44:47,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:44:47,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 197 [2018-10-22 15:44:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:47,380 INFO L225 Difference]: With dead ends: 212 [2018-10-22 15:44:47,380 INFO L226 Difference]: Without dead ends: 206 [2018-10-22 15:44:47,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:44:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-22 15:44:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2018-10-22 15:44:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:44:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-22 15:44:47,386 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2018-10-22 15:44:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:47,386 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-22 15:44:47,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:44:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-22 15:44:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:44:47,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:47,387 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:47,388 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:47,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1292161835, now seen corresponding path program 38 times [2018-10-22 15:44:47,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:47,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:47,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:48,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:48,152 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 15:44:48,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:44:48,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:44:48,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:48,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:48,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:48,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-22 15:44:48,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:44:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:44:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:44:48,385 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 42 states. [2018-10-22 15:44:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:49,474 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-22 15:44:49,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:44:49,474 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2018-10-22 15:44:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:49,476 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:44:49,476 INFO L226 Difference]: Without dead ends: 211 [2018-10-22 15:44:49,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:44:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-22 15:44:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2018-10-22 15:44:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-22 15:44:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-22 15:44:49,481 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2018-10-22 15:44:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:49,481 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-22 15:44:49,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:44:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-22 15:44:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-22 15:44:49,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:49,483 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:49,483 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:49,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1656221269, now seen corresponding path program 39 times [2018-10-22 15:44:49,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:49,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:49,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:49,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:49,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:50,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:50,435 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 15:44:50,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown