java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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-df4b876 [2018-11-06 22:43:37,653 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:43:37,655 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:43:37,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:43:37,667 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:43:37,668 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:43:37,669 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:43:37,671 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:43:37,673 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:43:37,674 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:43:37,675 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:43:37,675 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:43:37,676 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:43:37,677 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:43:37,678 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:43:37,679 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:43:37,679 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:43:37,681 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:43:37,683 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:43:37,685 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:43:37,686 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:43:37,687 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:43:37,690 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:43:37,699 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:43:37,714 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:43:37,714 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:43:37,715 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:43:37,715 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:43:37,716 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:43:37,716 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:43:37,716 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:43:37,716 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:43:37,717 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:43:37,717 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:43:37,717 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:43:37,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:43:37,717 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:43:37,718 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:43:37,718 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:43:37,718 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:43:37,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:43:37,718 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:43:37,719 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:43:37,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:43:37,719 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:43:37,719 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:43:37,719 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:43:37,720 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:43:37,720 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:43:37,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:43:37,720 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:43:37,720 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:43:37,770 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:43:37,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:43:37,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:43:37,790 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:43:37,790 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:43:37,791 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call2_true-termination.i [2018-11-06 22:43:37,852 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a36ceaf/689f6e9d02c14fa5a4ea9b9f1ea0c432/FLAGbc4af210c [2018-11-06 22:43:38,322 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:43:38,323 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call2_true-termination.i [2018-11-06 22:43:38,328 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a36ceaf/689f6e9d02c14fa5a4ea9b9f1ea0c432/FLAGbc4af210c [2018-11-06 22:43:38,345 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a36ceaf/689f6e9d02c14fa5a4ea9b9f1ea0c432 [2018-11-06 22:43:38,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:43:38,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:43:38,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:38,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:43:38,367 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:43:38,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d73b804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38, skipping insertion in model container [2018-11-06 22:43:38,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:43:38,408 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:43:38,627 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:38,631 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:43:38,653 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:43:38,678 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:43:38,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38 WrapperNode [2018-11-06 22:43:38,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:43:38,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:38,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:43:38,680 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:43:38,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:43:38,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:43:38,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:43:38,728 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:43:38,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... [2018-11-06 22:43:38,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:43:38,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:43:38,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:43:38,770 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:43:38,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:43:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-06 22:43:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-06 22:43:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:43:38,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:43:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-06 22:43:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-06 22:43:39,327 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:43:39,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:39 BoogieIcfgContainer [2018-11-06 22:43:39,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:43:39,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:43:39,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:43:39,332 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:43:39,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:38" (1/3) ... [2018-11-06 22:43:39,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1c2377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:39, skipping insertion in model container [2018-11-06 22:43:39,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:38" (2/3) ... [2018-11-06 22:43:39,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1c2377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:39, skipping insertion in model container [2018-11-06 22:43:39,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:39" (3/3) ... [2018-11-06 22:43:39,335 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call2_true-termination.i [2018-11-06 22:43:39,345 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:43:39,353 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:43:39,371 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:43:39,401 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:43:39,402 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:43:39,402 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:43:39,402 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:43:39,402 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:43:39,402 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:43:39,402 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:43:39,402 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:43:39,402 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:43:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-06 22:43:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:43:39,424 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:39,425 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:39,428 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:39,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2050677830, now seen corresponding path program 1 times [2018-11-06 22:43:39,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:39,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:39,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:39,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:39,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:39,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:43:39,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:43:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:43:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:43:39,576 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-11-06 22:43:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:39,595 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-06 22:43:39,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:43:39,597 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-06 22:43:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:39,610 INFO L225 Difference]: With dead ends: 39 [2018-11-06 22:43:39,612 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:43:39,615 INFO L604 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 [2018-11-06 22:43:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:43:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-06 22:43:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:43:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-06 22:43:39,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2018-11-06 22:43:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:39,653 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-06 22:43:39,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:43:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-06 22:43:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:43:39,654 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:39,654 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:39,655 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:39,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1065484118, now seen corresponding path program 1 times [2018-11-06 22:43:39,657 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:39,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:39,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:39,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:39,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:43:39,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:43:39,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:43:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:43:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:43:39,738 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-11-06 22:43:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:39,796 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-11-06 22:43:39,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:43:39,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-06 22:43:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:39,798 INFO L225 Difference]: With dead ends: 29 [2018-11-06 22:43:39,798 INFO L226 Difference]: Without dead ends: 23 [2018-11-06 22:43:39,799 INFO L604 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 [2018-11-06 22:43:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-06 22:43:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-11-06 22:43:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:43:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-06 22:43:39,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2018-11-06 22:43:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:39,807 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-06 22:43:39,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:43:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-06 22:43:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:43:39,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:39,809 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:39,809 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:39,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 820607150, now seen corresponding path program 1 times [2018-11-06 22:43:39,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:39,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:39,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:39,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:39,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:39,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:40,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:40,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-06 22:43:40,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:43:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:43:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:40,047 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2018-11-06 22:43:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:40,132 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-06 22:43:40,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:43:40,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-11-06 22:43:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:40,134 INFO L225 Difference]: With dead ends: 35 [2018-11-06 22:43:40,134 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:43:40,135 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:43:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:43:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-11-06 22:43:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:43:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-06 22:43:40,140 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2018-11-06 22:43:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:40,140 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-06 22:43:40,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:43:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-06 22:43:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:43:40,142 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:40,142 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:40,142 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:40,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 976654342, now seen corresponding path program 2 times [2018-11-06 22:43:40,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:40,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:40,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:40,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:40,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:40,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:40,220 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:40,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:40,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:40,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:40,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:40,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:40,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-06 22:43:40,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:43:40,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:43:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:40,369 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 6 states. [2018-11-06 22:43:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:40,584 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-06 22:43:40,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:43:40,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-11-06 22:43:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:40,586 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:43:40,586 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:43:40,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:43:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-11-06 22:43:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:43:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-06 22:43:40,596 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2018-11-06 22:43:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:40,598 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-06 22:43:40,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:43:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-06 22:43:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:43:40,599 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:40,599 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:40,601 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:40,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:40,602 INFO L82 PathProgramCache]: Analyzing trace with hash 876266846, now seen corresponding path program 3 times [2018-11-06 22:43:40,602 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:40,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:40,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:40,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:40,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:40,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:40,804 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:40,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:40,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:43:40,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:40,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:40,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:40,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-06 22:43:40,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:43:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:43:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:40,900 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 7 states. [2018-11-06 22:43:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:41,084 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-11-06 22:43:41,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:43:41,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-11-06 22:43:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:41,086 INFO L225 Difference]: With dead ends: 47 [2018-11-06 22:43:41,086 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:43:41,088 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:43:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:43:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-11-06 22:43:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:43:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-06 22:43:41,093 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 30 [2018-11-06 22:43:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:41,094 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-06 22:43:41,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:43:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-06 22:43:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-06 22:43:41,095 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:41,096 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:41,096 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:41,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1957140662, now seen corresponding path program 4 times [2018-11-06 22:43:41,096 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:41,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:41,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:41,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:41,199 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:41,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:41,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:41,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:41,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:41,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:41,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-06 22:43:41,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:43:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:43:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:41,300 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 8 states. [2018-11-06 22:43:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:41,374 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-11-06 22:43:41,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:43:41,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-11-06 22:43:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:41,376 INFO L225 Difference]: With dead ends: 53 [2018-11-06 22:43:41,376 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:43:41,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:43:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:43:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-11-06 22:43:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:43:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-06 22:43:41,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2018-11-06 22:43:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:41,383 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-06 22:43:41,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:43:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-06 22:43:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:43:41,385 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:41,385 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:41,385 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:41,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1508996594, now seen corresponding path program 5 times [2018-11-06 22:43:41,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:41,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:41,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:41,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:41,798 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:41,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:41,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:43:41,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:41,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:41,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:41,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-06 22:43:41,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:43:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:43:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:43:41,914 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 9 states. [2018-11-06 22:43:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:42,146 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-11-06 22:43:42,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:43:42,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-11-06 22:43:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:42,147 INFO L225 Difference]: With dead ends: 59 [2018-11-06 22:43:42,148 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:43:42,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:43:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:43:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-11-06 22:43:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:43:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-06 22:43:42,155 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2018-11-06 22:43:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:42,156 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-06 22:43:42,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:43:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-06 22:43:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-06 22:43:42,157 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:42,157 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:42,158 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:42,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1612637850, now seen corresponding path program 6 times [2018-11-06 22:43:42,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:42,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:42,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:42,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:42,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:42,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:42,353 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:42,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:42,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:43:42,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:42,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:42,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:42,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-06 22:43:42,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:43:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:43:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:42,456 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 10 states. [2018-11-06 22:43:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:42,816 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-11-06 22:43:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:43:42,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-11-06 22:43:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:42,817 INFO L225 Difference]: With dead ends: 65 [2018-11-06 22:43:42,817 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:43:42,818 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:43:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-11-06 22:43:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:43:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-06 22:43:42,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2018-11-06 22:43:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:42,831 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-06 22:43:42,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:43:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-06 22:43:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-06 22:43:42,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:42,833 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:42,834 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:42,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1047578302, now seen corresponding path program 7 times [2018-11-06 22:43:42,834 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:42,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:42,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:42,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:43,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:43,365 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:43,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:43,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:43,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:43,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-06 22:43:43,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:43:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:43:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:43:43,452 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 11 states. [2018-11-06 22:43:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:43,614 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-11-06 22:43:43,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:43:43,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2018-11-06 22:43:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:43,618 INFO L225 Difference]: With dead ends: 71 [2018-11-06 22:43:43,618 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:43:43,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:43:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:43:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2018-11-06 22:43:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-06 22:43:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-06 22:43:43,625 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2018-11-06 22:43:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:43,626 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-06 22:43:43,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:43:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-06 22:43:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-06 22:43:43,627 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:43,627 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:43,628 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:43,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 988746262, now seen corresponding path program 8 times [2018-11-06 22:43:43,628 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:43,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:43,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:43,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:43,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:43,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:43,778 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:43,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:43,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:43,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:43,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:43,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:43,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-06 22:43:43,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:43:43,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:43:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:43:43,931 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 12 states. [2018-11-06 22:43:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:44,019 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-11-06 22:43:44,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:43:44,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2018-11-06 22:43:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:44,022 INFO L225 Difference]: With dead ends: 77 [2018-11-06 22:43:44,022 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:43:44,023 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:43:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:43:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-11-06 22:43:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:43:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-06 22:43:44,029 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 60 [2018-11-06 22:43:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:44,030 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-06 22:43:44,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:43:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-06 22:43:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-06 22:43:44,031 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:44,031 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:44,032 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:44,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash 57506670, now seen corresponding path program 9 times [2018-11-06 22:43:44,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:44,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:44,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:44,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:44,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:44,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:44,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:44,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:44,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:43:44,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:44,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:44,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:44,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-06 22:43:44,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:43:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:43:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:43:44,343 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 13 states. [2018-11-06 22:43:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:44,534 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-11-06 22:43:44,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:43:44,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2018-11-06 22:43:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:44,536 INFO L225 Difference]: With dead ends: 83 [2018-11-06 22:43:44,536 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:43:44,537 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:43:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:43:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2018-11-06 22:43:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-06 22:43:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-11-06 22:43:44,544 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 66 [2018-11-06 22:43:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:44,544 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-11-06 22:43:44,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:43:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-11-06 22:43:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-06 22:43:44,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:44,546 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:44,546 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:44,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1830976826, now seen corresponding path program 10 times [2018-11-06 22:43:44,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:44,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:44,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:44,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:44,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:44,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:44,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:44,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:44,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:44,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:44,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:44,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-06 22:43:44,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:43:44,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:43:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:43:44,864 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 14 states. [2018-11-06 22:43:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:45,011 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-11-06 22:43:45,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:43:45,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2018-11-06 22:43:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:45,013 INFO L225 Difference]: With dead ends: 89 [2018-11-06 22:43:45,014 INFO L226 Difference]: Without dead ends: 83 [2018-11-06 22:43:45,014 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:43:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-06 22:43:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-11-06 22:43:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:43:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-06 22:43:45,021 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2018-11-06 22:43:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:45,022 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-06 22:43:45,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:43:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-06 22:43:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:43:45,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:45,028 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:45,028 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:45,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1225828382, now seen corresponding path program 11 times [2018-11-06 22:43:45,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:45,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:45,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:45,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:45,322 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:45,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:45,405 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:43:45,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:45,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:45,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:45,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-06 22:43:45,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:43:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:43:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:45,470 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 15 states. [2018-11-06 22:43:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:45,632 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-11-06 22:43:45,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:43:45,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2018-11-06 22:43:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:45,635 INFO L225 Difference]: With dead ends: 95 [2018-11-06 22:43:45,635 INFO L226 Difference]: Without dead ends: 89 [2018-11-06 22:43:45,636 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-06 22:43:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-11-06 22:43:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-06 22:43:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-11-06 22:43:45,644 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 78 [2018-11-06 22:43:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:45,645 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-11-06 22:43:45,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:43:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-11-06 22:43:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-06 22:43:45,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:45,647 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:45,647 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:45,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1028101258, now seen corresponding path program 12 times [2018-11-06 22:43:45,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:45,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:45,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:45,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:45,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:45,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:45,901 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:45,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:46,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:43:46,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:46,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:46,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:46,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-06 22:43:46,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:43:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:43:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:43:46,137 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 16 states. [2018-11-06 22:43:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:46,374 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-11-06 22:43:46,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:43:46,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2018-11-06 22:43:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:46,376 INFO L225 Difference]: With dead ends: 101 [2018-11-06 22:43:46,376 INFO L226 Difference]: Without dead ends: 95 [2018-11-06 22:43:46,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:43:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-06 22:43:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-11-06 22:43:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-06 22:43:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-11-06 22:43:46,382 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2018-11-06 22:43:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:46,383 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-11-06 22:43:46,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:43:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-11-06 22:43:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-06 22:43:46,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:46,385 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:46,385 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:46,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1318695730, now seen corresponding path program 13 times [2018-11-06 22:43:46,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:46,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:46,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:46,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:46,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:47,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:47,298 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:47,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:47,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:47,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:47,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-06 22:43:47,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:43:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:43:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:43:47,473 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 17 states. [2018-11-06 22:43:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:47,583 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-11-06 22:43:47,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:43:47,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2018-11-06 22:43:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:47,585 INFO L225 Difference]: With dead ends: 107 [2018-11-06 22:43:47,585 INFO L226 Difference]: Without dead ends: 101 [2018-11-06 22:43:47,586 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:43:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-06 22:43:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2018-11-06 22:43:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-06 22:43:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-11-06 22:43:47,591 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 90 [2018-11-06 22:43:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:47,591 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-11-06 22:43:47,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:43:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-11-06 22:43:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-06 22:43:47,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:47,594 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:47,594 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:47,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1282683866, now seen corresponding path program 14 times [2018-11-06 22:43:47,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:47,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:47,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:47,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:47,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:48,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:48,653 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:48,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:48,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:48,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:48,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:48,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:48,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-06 22:43:48,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:43:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:43:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:43:48,851 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 18 states. [2018-11-06 22:43:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:48,983 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-11-06 22:43:48,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:43:48,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2018-11-06 22:43:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:48,985 INFO L225 Difference]: With dead ends: 113 [2018-11-06 22:43:48,985 INFO L226 Difference]: Without dead ends: 107 [2018-11-06 22:43:48,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:43:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-06 22:43:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-11-06 22:43:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-06 22:43:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-11-06 22:43:48,990 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 96 [2018-11-06 22:43:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:48,990 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-11-06 22:43:48,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:43:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-11-06 22:43:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-06 22:43:48,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:48,992 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:48,992 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:48,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 746219902, now seen corresponding path program 15 times [2018-11-06 22:43:48,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:48,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:48,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:48,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:48,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:49,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:49,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:49,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:49,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:43:49,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:49,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:49,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:49,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-06 22:43:49,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:43:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:43:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:43:49,557 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 19 states. [2018-11-06 22:43:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:49,722 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-11-06 22:43:49,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:43:49,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2018-11-06 22:43:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:49,724 INFO L225 Difference]: With dead ends: 119 [2018-11-06 22:43:49,724 INFO L226 Difference]: Without dead ends: 113 [2018-11-06 22:43:49,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:43:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-06 22:43:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-11-06 22:43:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-06 22:43:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-11-06 22:43:49,729 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 102 [2018-11-06 22:43:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:49,729 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-11-06 22:43:49,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:43:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-11-06 22:43:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-06 22:43:49,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:49,731 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:49,731 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:49,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 476292310, now seen corresponding path program 16 times [2018-11-06 22:43:49,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:49,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:49,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:49,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:49,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:49,975 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:49,986 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:50,236 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:50,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:50,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:50,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:50,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-06 22:43:50,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:43:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:43:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:43:50,311 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 20 states. [2018-11-06 22:43:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:50,437 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-11-06 22:43:50,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:43:50,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2018-11-06 22:43:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:50,439 INFO L225 Difference]: With dead ends: 125 [2018-11-06 22:43:50,439 INFO L226 Difference]: Without dead ends: 119 [2018-11-06 22:43:50,440 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:43:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-06 22:43:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-11-06 22:43:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-06 22:43:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-11-06 22:43:50,444 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 108 [2018-11-06 22:43:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:50,444 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-11-06 22:43:50,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:43:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-11-06 22:43:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-06 22:43:50,445 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:50,446 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:50,446 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:50,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -128385490, now seen corresponding path program 17 times [2018-11-06 22:43:50,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:50,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:50,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:50,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:50,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:50,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:50,921 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:50,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:51,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:43:51,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:51,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:51,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:51,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-06 22:43:51,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:43:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:43:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:43:51,266 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 21 states. [2018-11-06 22:43:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:51,479 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-11-06 22:43:51,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:43:51,479 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2018-11-06 22:43:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:51,481 INFO L225 Difference]: With dead ends: 131 [2018-11-06 22:43:51,481 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:43:51,482 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:43:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:43:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2018-11-06 22:43:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-06 22:43:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-11-06 22:43:51,486 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 114 [2018-11-06 22:43:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:51,486 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-11-06 22:43:51,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:43:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-11-06 22:43:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-06 22:43:51,487 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:51,488 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:51,488 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:51,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2108951162, now seen corresponding path program 18 times [2018-11-06 22:43:51,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:51,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:51,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:51,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:51,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:51,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:51,770 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:51,778 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:52,262 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:43:52,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:52,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:52,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:52,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-06 22:43:52,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:43:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:43:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:43:52,320 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 22 states. [2018-11-06 22:43:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:52,496 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-11-06 22:43:52,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:43:52,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 120 [2018-11-06 22:43:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:52,499 INFO L225 Difference]: With dead ends: 137 [2018-11-06 22:43:52,499 INFO L226 Difference]: Without dead ends: 131 [2018-11-06 22:43:52,500 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:43:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-06 22:43:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-11-06 22:43:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-06 22:43:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-11-06 22:43:52,504 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 120 [2018-11-06 22:43:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:52,504 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-11-06 22:43:52,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:43:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-11-06 22:43:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-06 22:43:52,505 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:52,505 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:52,505 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:52,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1592915234, now seen corresponding path program 19 times [2018-11-06 22:43:52,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:52,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:52,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:52,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:52,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:53,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:53,000 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:53,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:53,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:53,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:53,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-06 22:43:53,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:43:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:43:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:53,108 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 23 states. [2018-11-06 22:43:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:53,437 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-11-06 22:43:53,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:43:53,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 126 [2018-11-06 22:43:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:53,439 INFO L225 Difference]: With dead ends: 143 [2018-11-06 22:43:53,439 INFO L226 Difference]: Without dead ends: 137 [2018-11-06 22:43:53,440 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-11-06 22:43:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2018-11-06 22:43:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-06 22:43:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-11-06 22:43:53,444 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 126 [2018-11-06 22:43:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:53,444 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-11-06 22:43:53,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:43:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-11-06 22:43:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-06 22:43:53,445 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:53,445 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:53,445 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:53,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:53,446 INFO L82 PathProgramCache]: Analyzing trace with hash 944815670, now seen corresponding path program 20 times [2018-11-06 22:43:53,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:53,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:53,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:53,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:53,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:53,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:53,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:53,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:53,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:53,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:54,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:54,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-06 22:43:54,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:43:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:43:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:43:54,007 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 24 states. [2018-11-06 22:43:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:54,148 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-11-06 22:43:54,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:43:54,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 132 [2018-11-06 22:43:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:54,153 INFO L225 Difference]: With dead ends: 149 [2018-11-06 22:43:54,153 INFO L226 Difference]: Without dead ends: 143 [2018-11-06 22:43:54,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:43:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-06 22:43:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-11-06 22:43:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-06 22:43:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-11-06 22:43:54,157 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 132 [2018-11-06 22:43:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:54,158 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-11-06 22:43:54,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:43:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-11-06 22:43:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-06 22:43:54,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:54,159 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:54,159 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:54,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash 10850190, now seen corresponding path program 21 times [2018-11-06 22:43:54,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:54,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:54,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:54,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:54,577 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:54,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:55,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:43:55,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:55,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:55,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:55,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-06 22:43:55,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:43:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:43:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:43:55,155 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 25 states. [2018-11-06 22:43:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:55,348 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-11-06 22:43:55,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:43:55,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 138 [2018-11-06 22:43:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:55,350 INFO L225 Difference]: With dead ends: 155 [2018-11-06 22:43:55,350 INFO L226 Difference]: Without dead ends: 149 [2018-11-06 22:43:55,351 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:43:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-11-06 22:43:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-11-06 22:43:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-06 22:43:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-11-06 22:43:55,355 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 138 [2018-11-06 22:43:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:55,356 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-11-06 22:43:55,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:43:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-11-06 22:43:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-06 22:43:55,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:55,357 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:55,357 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:55,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1602092774, now seen corresponding path program 22 times [2018-11-06 22:43:55,358 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:55,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:55,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:55,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:55,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:55,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:43:55,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:55,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:55,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:55,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:55,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:55,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-06 22:43:55,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:43:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:43:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:43:55,877 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 26 states. [2018-11-06 22:43:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:56,207 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-11-06 22:43:56,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:43:56,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 144 [2018-11-06 22:43:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:56,209 INFO L225 Difference]: With dead ends: 161 [2018-11-06 22:43:56,209 INFO L226 Difference]: Without dead ends: 155 [2018-11-06 22:43:56,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:43:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-06 22:43:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-11-06 22:43:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-06 22:43:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-11-06 22:43:56,213 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 144 [2018-11-06 22:43:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:56,213 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-11-06 22:43:56,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:43:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-11-06 22:43:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-06 22:43:56,214 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:56,214 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:56,215 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:56,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1059818558, now seen corresponding path program 23 times [2018-11-06 22:43:56,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:56,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:56,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:56,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:56,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:56,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:43:56,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:56,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-06 22:43:56,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:56,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:57,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:57,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-06 22:43:57,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:43:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:43:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:43:57,025 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 27 states. [2018-11-06 22:43:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:57,216 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-11-06 22:43:57,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:43:57,224 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 150 [2018-11-06 22:43:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:57,225 INFO L225 Difference]: With dead ends: 167 [2018-11-06 22:43:57,225 INFO L226 Difference]: Without dead ends: 161 [2018-11-06 22:43:57,226 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:43:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-06 22:43:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2018-11-06 22:43:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-06 22:43:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-11-06 22:43:57,230 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 150 [2018-11-06 22:43:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:57,230 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-11-06 22:43:57,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:43:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-11-06 22:43:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-06 22:43:57,231 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:57,231 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:57,232 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:57,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash -421546090, now seen corresponding path program 24 times [2018-11-06 22:43:57,232 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:57,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:58,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:58,250 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:43:58,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:00,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:44:00,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:00,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:00,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:00,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-06 22:44:00,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:44:00,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:44:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:00,756 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 28 states. [2018-11-06 22:44:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:00,953 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-11-06 22:44:00,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:44:00,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 156 [2018-11-06 22:44:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:00,955 INFO L225 Difference]: With dead ends: 173 [2018-11-06 22:44:00,955 INFO L226 Difference]: Without dead ends: 167 [2018-11-06 22:44:00,956 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:44:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-11-06 22:44:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-11-06 22:44:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-06 22:44:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-11-06 22:44:00,961 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 156 [2018-11-06 22:44:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:00,962 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-11-06 22:44:00,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:44:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-11-06 22:44:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-06 22:44:00,963 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:00,963 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:00,963 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:00,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -760479506, now seen corresponding path program 25 times [2018-11-06 22:44:00,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:00,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:00,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:02,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:02,086 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:02,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:02,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:02,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:02,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-06 22:44:02,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:44:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:44:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:44:02,220 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 29 states. [2018-11-06 22:44:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:02,406 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-11-06 22:44:02,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:44:02,412 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 162 [2018-11-06 22:44:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:02,413 INFO L225 Difference]: With dead ends: 179 [2018-11-06 22:44:02,413 INFO L226 Difference]: Without dead ends: 173 [2018-11-06 22:44:02,414 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:44:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-06 22:44:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-11-06 22:44:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-06 22:44:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-11-06 22:44:02,417 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 162 [2018-11-06 22:44:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:02,418 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-11-06 22:44:02,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:44:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-11-06 22:44:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-06 22:44:02,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:02,419 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:02,419 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:02,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1954420666, now seen corresponding path program 26 times [2018-11-06 22:44:02,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:02,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:02,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:02,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:03,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:03,302 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:03,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:03,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:03,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:03,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:03,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:03,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-06 22:44:03,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:44:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:44:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:44:03,528 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 30 states. [2018-11-06 22:44:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:04,552 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-11-06 22:44:04,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:44:04,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 168 [2018-11-06 22:44:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:04,554 INFO L225 Difference]: With dead ends: 185 [2018-11-06 22:44:04,554 INFO L226 Difference]: Without dead ends: 179 [2018-11-06 22:44:04,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:44:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-06 22:44:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-11-06 22:44:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-06 22:44:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-11-06 22:44:04,558 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 168 [2018-11-06 22:44:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:04,559 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-11-06 22:44:04,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:44:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-11-06 22:44:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-06 22:44:04,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:04,560 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:04,560 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:04,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2134044062, now seen corresponding path program 27 times [2018-11-06 22:44:04,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:04,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:04,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:04,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:04,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:05,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:05,032 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:05,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:06,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-06 22:44:06,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:06,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:06,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:06,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-06 22:44:06,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:44:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:44:06,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:44:06,480 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 31 states. [2018-11-06 22:44:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:07,155 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-11-06 22:44:07,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:44:07,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 174 [2018-11-06 22:44:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:07,157 INFO L225 Difference]: With dead ends: 191 [2018-11-06 22:44:07,157 INFO L226 Difference]: Without dead ends: 185 [2018-11-06 22:44:07,157 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:44:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-11-06 22:44:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2018-11-06 22:44:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-06 22:44:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-11-06 22:44:07,164 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 174 [2018-11-06 22:44:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:07,164 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-11-06 22:44:07,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:44:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-11-06 22:44:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-06 22:44:07,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:07,167 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:07,168 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:07,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash -663711498, now seen corresponding path program 28 times [2018-11-06 22:44:07,168 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:07,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:07,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:07,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:07,954 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:07,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:08,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:08,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:08,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:08,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:08,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-06 22:44:08,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:44:08,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:44:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:44:08,963 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 32 states. [2018-11-06 22:44:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:09,222 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-11-06 22:44:09,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:44:09,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 180 [2018-11-06 22:44:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:09,224 INFO L225 Difference]: With dead ends: 197 [2018-11-06 22:44:09,224 INFO L226 Difference]: Without dead ends: 191 [2018-11-06 22:44:09,225 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:44:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-11-06 22:44:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-11-06 22:44:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-06 22:44:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-11-06 22:44:09,229 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 180 [2018-11-06 22:44:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:09,229 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-11-06 22:44:09,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:44:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-11-06 22:44:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-06 22:44:09,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:09,231 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:09,231 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:09,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:09,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1456230990, now seen corresponding path program 29 times [2018-11-06 22:44:09,231 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:09,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:09,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:09,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:09,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:11,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:11,912 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:11,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:12,481 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-06 22:44:12,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:12,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:12,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:12,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-06 22:44:12,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:44:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:44:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:44:12,579 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 33 states. [2018-11-06 22:44:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:12,806 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-11-06 22:44:12,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:44:12,807 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 186 [2018-11-06 22:44:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:12,809 INFO L225 Difference]: With dead ends: 203 [2018-11-06 22:44:12,809 INFO L226 Difference]: Without dead ends: 197 [2018-11-06 22:44:12,810 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:44:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-06 22:44:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2018-11-06 22:44:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-06 22:44:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-11-06 22:44:12,814 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 186 [2018-11-06 22:44:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:12,815 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-11-06 22:44:12,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:44:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-11-06 22:44:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-06 22:44:12,816 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:12,816 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:12,817 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:12,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash 649572774, now seen corresponding path program 30 times [2018-11-06 22:44:12,817 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:12,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:12,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:12,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:12,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:13,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:13,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:13,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:21,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-06 22:44:21,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:21,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:21,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:21,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-06 22:44:21,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:44:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:44:21,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:21,962 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 34 states. [2018-11-06 22:44:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:22,334 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-11-06 22:44:22,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:44:22,334 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 192 [2018-11-06 22:44:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:22,336 INFO L225 Difference]: With dead ends: 209 [2018-11-06 22:44:22,336 INFO L226 Difference]: Without dead ends: 203 [2018-11-06 22:44:22,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:44:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-06 22:44:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-11-06 22:44:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-06 22:44:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-11-06 22:44:22,342 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 192 [2018-11-06 22:44:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:22,343 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-11-06 22:44:22,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:44:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-11-06 22:44:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-11-06 22:44:22,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:22,344 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:22,344 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:22,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1182519554, now seen corresponding path program 31 times [2018-11-06 22:44:22,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:22,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:22,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:22,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:24,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:24,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:24,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:24,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:24,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:24,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-06 22:44:24,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:44:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:44:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:44:24,603 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 35 states. [2018-11-06 22:44:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:24,813 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-11-06 22:44:24,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:44:24,814 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 198 [2018-11-06 22:44:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:24,816 INFO L225 Difference]: With dead ends: 215 [2018-11-06 22:44:24,816 INFO L226 Difference]: Without dead ends: 209 [2018-11-06 22:44:24,817 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:44:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-06 22:44:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-11-06 22:44:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-11-06 22:44:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-11-06 22:44:24,822 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 198 [2018-11-06 22:44:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:24,822 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-11-06 22:44:24,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:44:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-11-06 22:44:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-06 22:44:24,823 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:24,823 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:24,824 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:24,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1654437290, now seen corresponding path program 32 times [2018-11-06 22:44:24,824 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:24,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:24,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:24,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 3040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:25,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:25,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:25,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:25,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:25,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:25,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 3040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:26,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:26,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-06 22:44:26,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:44:26,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:44:26,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:44:26,076 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 36 states. [2018-11-06 22:44:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:26,839 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-11-06 22:44:26,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:44:26,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 204 [2018-11-06 22:44:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:26,840 INFO L225 Difference]: With dead ends: 221 [2018-11-06 22:44:26,840 INFO L226 Difference]: Without dead ends: 215 [2018-11-06 22:44:26,841 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:44:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-11-06 22:44:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2018-11-06 22:44:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-06 22:44:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-11-06 22:44:26,846 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 204 [2018-11-06 22:44:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:26,846 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-11-06 22:44:26,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:44:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-11-06 22:44:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-06 22:44:26,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:26,848 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:26,848 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:26,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1432781742, now seen corresponding path program 33 times [2018-11-06 22:44:26,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:26,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:26,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:26,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 3234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:28,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:28,161 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:28,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:34,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-11-06 22:44:34,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:34,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 3234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:34,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:34,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-06 22:44:34,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:44:34,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:44:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:44:34,276 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 37 states. [2018-11-06 22:44:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:34,516 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-11-06 22:44:34,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:44:34,517 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 210 [2018-11-06 22:44:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:34,519 INFO L225 Difference]: With dead ends: 227 [2018-11-06 22:44:34,519 INFO L226 Difference]: Without dead ends: 221 [2018-11-06 22:44:34,520 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:44:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-11-06 22:44:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2018-11-06 22:44:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-06 22:44:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-11-06 22:44:34,524 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 210 [2018-11-06 22:44:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:34,524 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-11-06 22:44:34,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:44:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-11-06 22:44:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-06 22:44:34,525 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:34,525 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:34,526 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:34,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 830429958, now seen corresponding path program 34 times [2018-11-06 22:44:34,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:34,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:34,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:34,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:34,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 3434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:35,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:35,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:35,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:35,960 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:35,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:35,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 3434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:36,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:36,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-06 22:44:36,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:44:36,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:44:36,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:44:36,052 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 38 states. [2018-11-06 22:44:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:36,324 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-11-06 22:44:36,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:44:36,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 216 [2018-11-06 22:44:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:36,327 INFO L225 Difference]: With dead ends: 233 [2018-11-06 22:44:36,327 INFO L226 Difference]: Without dead ends: 227 [2018-11-06 22:44:36,328 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:44:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-11-06 22:44:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2018-11-06 22:44:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-11-06 22:44:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-11-06 22:44:36,332 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 216 [2018-11-06 22:44:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:36,332 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-11-06 22:44:36,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:44:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-11-06 22:44:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-06 22:44:36,334 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:36,334 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:36,334 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:36,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash 645877854, now seen corresponding path program 35 times [2018-11-06 22:44:36,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:36,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:36,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:36,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:36,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 3640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:37,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:37,052 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:37,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:42,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-11-06 22:44:42,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:42,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 3640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:42,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:42,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-06 22:44:42,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:44:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:44:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:44:42,830 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 39 states. [2018-11-06 22:44:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:43,097 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-11-06 22:44:43,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:44:43,098 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 222 [2018-11-06 22:44:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:43,099 INFO L225 Difference]: With dead ends: 239 [2018-11-06 22:44:43,099 INFO L226 Difference]: Without dead ends: 233 [2018-11-06 22:44:43,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:44:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-11-06 22:44:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-11-06 22:44:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-11-06 22:44:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-11-06 22:44:43,103 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 222 [2018-11-06 22:44:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:43,104 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-11-06 22:44:43,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:44:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-11-06 22:44:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-11-06 22:44:43,105 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:43,105 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:43,105 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:43,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:43,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1508383818, now seen corresponding path program 36 times [2018-11-06 22:44:43,106 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:43,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:43,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:43,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:43,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 3852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:44,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:44,531 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:44:44,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:45:24,699 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-06 22:45:24,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:24,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 3852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:24,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:24,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-06 22:45:24,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:45:24,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:45:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:45:24,911 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 40 states. [2018-11-06 22:45:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:25,394 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-11-06 22:45:25,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:45:25,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 228 [2018-11-06 22:45:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:25,396 INFO L225 Difference]: With dead ends: 245 [2018-11-06 22:45:25,396 INFO L226 Difference]: Without dead ends: 239 [2018-11-06 22:45:25,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:45:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-11-06 22:45:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-11-06 22:45:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-11-06 22:45:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-11-06 22:45:25,401 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 228 [2018-11-06 22:45:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:25,401 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-11-06 22:45:25,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:45:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-11-06 22:45:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-06 22:45:25,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:25,403 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:25,403 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:25,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:25,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1994036494, now seen corresponding path program 37 times [2018-11-06 22:45:25,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:25,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:25,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:25,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:25,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 4070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:26,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:26,118 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:45:26,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:26,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 4070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:26,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:26,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-06 22:45:26,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:45:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:45:26,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:45:26,383 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 41 states. [2018-11-06 22:45:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:26,665 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-11-06 22:45:26,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:45:26,665 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 234 [2018-11-06 22:45:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:26,667 INFO L225 Difference]: With dead ends: 251 [2018-11-06 22:45:26,667 INFO L226 Difference]: Without dead ends: 245 [2018-11-06 22:45:26,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:45:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-11-06 22:45:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2018-11-06 22:45:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-06 22:45:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-11-06 22:45:26,671 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 234 [2018-11-06 22:45:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:26,672 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-11-06 22:45:26,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:45:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-11-06 22:45:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-06 22:45:26,673 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:26,673 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:26,673 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:26,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:26,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1942428570, now seen corresponding path program 38 times [2018-11-06 22:45:26,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:26,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:26,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:26,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 0 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:27,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:27,437 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:45:27,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:45:27,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:45:27,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:27,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 0 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:27,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:27,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-06 22:45:27,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:45:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:45:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:45:27,663 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 42 states. [2018-11-06 22:45:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:28,043 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-11-06 22:45:28,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:45:28,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 240 [2018-11-06 22:45:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:28,046 INFO L225 Difference]: With dead ends: 257 [2018-11-06 22:45:28,046 INFO L226 Difference]: Without dead ends: 251 [2018-11-06 22:45:28,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:45:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-11-06 22:45:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2018-11-06 22:45:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-11-06 22:45:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-11-06 22:45:28,050 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 240 [2018-11-06 22:45:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:28,050 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-11-06 22:45:28,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:45:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-11-06 22:45:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-06 22:45:28,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:28,052 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:28,052 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:28,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash -561753666, now seen corresponding path program 39 times [2018-11-06 22:45:28,052 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:28,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:28,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 0 proven. 4524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:29,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:29,199 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:45:29,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:45:57,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-06 22:45:57,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:57,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 0 proven. 4524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:57,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:57,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-06 22:45:57,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:45:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:45:57,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:45:57,654 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 43 states. [2018-11-06 22:45:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:57,929 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-11-06 22:45:57,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:45:57,930 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 246 [2018-11-06 22:45:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:57,931 INFO L225 Difference]: With dead ends: 263 [2018-11-06 22:45:57,931 INFO L226 Difference]: Without dead ends: 257 [2018-11-06 22:45:57,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:45:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-11-06 22:45:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2018-11-06 22:45:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-11-06 22:45:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-11-06 22:45:57,937 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 246 [2018-11-06 22:45:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-11-06 22:45:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:45:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-11-06 22:45:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-06 22:45:57,938 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:57,938 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:57,939 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:57,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1122917654, now seen corresponding path program 40 times [2018-11-06 22:45:57,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:57,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:57,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 4760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:58,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:58,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:58,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:46:03,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:46:03,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:03,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 4760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:03,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:03,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-06 22:46:03,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:46:03,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:46:03,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:46:03,429 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 44 states. [2018-11-06 22:46:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:03,684 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-11-06 22:46:03,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:46:03,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 252 [2018-11-06 22:46:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:03,687 INFO L225 Difference]: With dead ends: 269 [2018-11-06 22:46:03,687 INFO L226 Difference]: Without dead ends: 263 [2018-11-06 22:46:03,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:46:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-11-06 22:46:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-11-06 22:46:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-11-06 22:46:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-11-06 22:46:03,692 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 252 [2018-11-06 22:46:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:03,693 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-11-06 22:46:03,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:46:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-11-06 22:46:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-06 22:46:03,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:03,694 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:03,694 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:03,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1133020782, now seen corresponding path program 41 times [2018-11-06 22:46:03,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:03,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:03,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:03,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:03,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 0 proven. 5002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:04,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:04,567 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:04,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:46:15,001 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-11-06 22:46:15,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:15,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 0 proven. 5002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:15,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:15,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-06 22:46:15,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:46:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:46:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:46:15,230 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 45 states. [2018-11-06 22:46:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:16,212 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-11-06 22:46:16,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:46:16,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 258 [2018-11-06 22:46:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:16,215 INFO L225 Difference]: With dead ends: 275 [2018-11-06 22:46:16,215 INFO L226 Difference]: Without dead ends: 269 [2018-11-06 22:46:16,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:46:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-11-06 22:46:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-11-06 22:46:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-11-06 22:46:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-11-06 22:46:16,221 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 258 [2018-11-06 22:46:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:16,221 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-11-06 22:46:16,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:46:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-11-06 22:46:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-06 22:46:16,222 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:16,223 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:16,223 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:16,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash -146518586, now seen corresponding path program 42 times [2018-11-06 22:46:16,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:16,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:16,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:16,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:16,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 0 proven. 5250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:17,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:17,306 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:17,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:47:59,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-06 22:47:59,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:47:59,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 0 proven. 5250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:59,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:59,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-11-06 22:47:59,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:47:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:47:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:47:59,786 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 46 states. [2018-11-06 22:48:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:48:01,138 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-11-06 22:48:01,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:48:01,139 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 264 [2018-11-06 22:48:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:48:01,141 INFO L225 Difference]: With dead ends: 281 [2018-11-06 22:48:01,141 INFO L226 Difference]: Without dead ends: 275 [2018-11-06 22:48:01,141 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:48:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-11-06 22:48:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2018-11-06 22:48:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-06 22:48:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-11-06 22:48:01,145 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 264 [2018-11-06 22:48:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:48:01,146 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-11-06 22:48:01,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:48:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-11-06 22:48:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-11-06 22:48:01,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:48:01,147 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:48:01,148 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:48:01,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:48:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -638373090, now seen corresponding path program 43 times [2018-11-06 22:48:01,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:48:01,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:48:01,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:01,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:48:01,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:48:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 0 proven. 5504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:02,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:48:02,184 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:48:02,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:48:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:48:02,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:48:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 0 proven. 5504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:02,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:48:02,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-11-06 22:48:02,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:48:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:48:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:48:02,350 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 47 states. Received shutdown request... [2018-11-06 22:48:02,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:48:02,548 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:48:02,553 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:48:02,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:48:02 BoogieIcfgContainer [2018-11-06 22:48:02,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:48:02,555 INFO L168 Benchmark]: Toolchain (without parser) took 264196.89 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -899.8 MB). Peak memory consumption was 229.0 MB. Max. memory is 7.1 GB. [2018-11-06 22:48:02,556 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:48:02,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:48:02,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:48:02,557 INFO L168 Benchmark]: Boogie Preprocessor took 36.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:48:02,557 INFO L168 Benchmark]: RCFGBuilder took 558.34 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2018-11-06 22:48:02,558 INFO L168 Benchmark]: TraceAbstraction took 263225.51 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 378.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -124.5 MB). Peak memory consumption was 253.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:48:02,561 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 558.34 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 263225.51 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 378.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -124.5 MB). Peak memory consumption was 253.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4). Cancelled while BasicCegarLoop was constructing difference of abstraction (271states) and FLOYD_HOARE automaton (currently 32 states, 47 states before enhancement),while ReachableStatesComputation was computing reachable states (184 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. TIMEOUT Result, 263.1s OverallTime, 45 OverallIterations, 44 TraceHistogramMax, 13.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 591 SDtfs, 3904 SDslu, 8012 SDs, 0 SdLazy, 5662 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7229 GetRequests, 6196 SyntacticMatches, 0 SemanticMatches, 1033 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 27.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 44 MinimizatonAttempts, 172 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 215.2s SatisfiabilityAnalysisTime, 30.9s InterpolantComputationTime, 12407 NumberOfCodeBlocks, 12407 NumberOfCodeBlocksAsserted, 578 NumberOfCheckSat, 12319 ConstructedInterpolants, 0 QuantifiedInterpolants, 6485095 SizeOfPredicates, 43 NumberOfNonLiveVariables, 10105 ConjunctsInSsa, 1032 ConjunctsInUnsatCore, 88 InterpolantComputations, 2 PerfectInterpolantSequences, 0/162712 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown