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/diamond_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:44:18,936 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:44:18,941 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:44:18,952 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:44:18,952 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:44:18,953 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:44:18,955 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:44:18,956 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:44:18,958 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:44:18,959 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:44:18,960 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:44:18,960 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:44:18,961 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:44:18,962 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:44:18,963 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:44:18,964 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:44:18,964 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:44:18,966 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:44:18,968 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:44:18,970 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:44:18,971 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:44:18,972 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:44:18,974 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:44:18,982 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 22:44:19,005 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:44:19,006 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:44:19,006 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:44:19,007 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:44:19,007 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:44:19,007 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:44:19,007 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:44:19,008 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:44:19,008 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:44:19,008 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:44:19,008 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:44:19,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:44:19,009 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:44:19,009 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:44:19,009 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:44:19,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:44:19,010 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:44:19,010 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:44:19,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:44:19,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:44:19,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:44:19,011 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:44:19,011 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:44:19,011 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:44:19,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:44:19,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:44:19,012 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:44:19,012 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:44:19,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:44:19,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:44:19,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:44:19,071 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:44:19,071 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:44:19,072 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-11-06 22:44:19,131 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685f4e02b/12cda0ad7a27488997bb3fa21f8f2641/FLAG31336f9e8 [2018-11-06 22:44:19,562 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:44:19,562 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-11-06 22:44:19,568 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685f4e02b/12cda0ad7a27488997bb3fa21f8f2641/FLAG31336f9e8 [2018-11-06 22:44:19,584 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685f4e02b/12cda0ad7a27488997bb3fa21f8f2641 [2018-11-06 22:44:19,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:44:19,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:44:19,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:19,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:44:19,600 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:44:19,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42844b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19, skipping insertion in model container [2018-11-06 22:44:19,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:44:19,639 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:44:19,860 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:19,864 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:44:19,879 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:19,894 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:44:19,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19 WrapperNode [2018-11-06 22:44:19,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:19,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:19,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:44:19,896 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:44:19,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:19,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:44:19,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:44:19,931 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:44:19,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (1/1) ... [2018-11-06 22:44:19,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:44:19,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:44:19,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:44:19,953 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:44:19,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (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 22:44:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:44:20,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:44:20,267 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:44:20,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:20 BoogieIcfgContainer [2018-11-06 22:44:20,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:44:20,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:44:20,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:44:20,273 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:44:20,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:19" (1/3) ... [2018-11-06 22:44:20,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e80543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:20, skipping insertion in model container [2018-11-06 22:44:20,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:19" (2/3) ... [2018-11-06 22:44:20,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e80543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:20, skipping insertion in model container [2018-11-06 22:44:20,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:20" (3/3) ... [2018-11-06 22:44:20,276 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call1_true-termination.i [2018-11-06 22:44:20,287 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:44:20,297 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:44:20,311 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:44:20,342 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:44:20,343 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:44:20,343 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:44:20,343 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:44:20,343 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:44:20,344 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:44:20,344 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:44:20,344 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:44:20,344 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:44:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-11-06 22:44:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:44:20,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:20,365 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:44:20,367 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:20,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-11-06 22:44:20,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:20,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:20,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:20,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:20,473 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 22:44:20,475 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:20,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:44:20,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:44:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:44:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:44:20,494 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-11-06 22:44:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:20,511 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:44:20,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:44:20,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:44:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:20,523 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:44:20,525 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:44:20,531 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 22:44:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:44:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:44:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:44:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-11-06 22:44:20,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-11-06 22:44:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:20,563 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-06 22:44:20,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:44:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-11-06 22:44:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:44:20,564 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:20,564 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:20,565 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:20,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-11-06 22:44:20,565 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:20,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:20,723 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 22:44:20,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:20,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:44:20,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:44:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:44:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:20,726 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-11-06 22:44:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:20,825 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-11-06 22:44:20,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:44:20,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:44:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:20,828 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:44:20,829 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:44:20,830 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 22:44:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:44:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-11-06 22:44:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:44:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-11-06 22:44:20,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-11-06 22:44:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:20,835 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-06 22:44:20,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:44:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-11-06 22:44:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:44:20,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:20,836 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:20,836 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:20,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-11-06 22:44:20,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:20,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:20,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:20,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:20,958 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 22:44:20,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:20,959 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 22:44:20,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:21,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:21,056 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 22:44:21,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:21,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:44:21,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:44:21,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:44:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:44:21,077 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-11-06 22:44:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:21,164 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-11-06 22:44:21,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:44:21,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-06 22:44:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:21,167 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:44:21,167 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:44:21,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:44:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:44:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-11-06 22:44:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:44:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-11-06 22:44:21,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-11-06 22:44:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:21,172 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-06 22:44:21,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:44:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-11-06 22:44:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:44:21,173 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:21,173 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:21,174 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:21,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-11-06 22:44:21,175 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:21,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:21,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:21,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:21,328 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 22:44:21,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:21,328 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 22:44:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:21,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:21,398 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 22:44:21,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:21,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:44:21,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:44:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:44:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:44:21,420 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-11-06 22:44:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:21,508 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:44:21,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:44:21,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-06 22:44:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:21,510 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:44:21,511 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:44:21,511 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:44:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:44:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-11-06 22:44:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:44:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-11-06 22:44:21,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-11-06 22:44:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:21,517 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-06 22:44:21,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:44:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-11-06 22:44:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:44:21,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:21,518 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:21,518 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:21,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-11-06 22:44:21,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:21,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:21,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:21,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:21,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:21,800 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 22:44:21,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:21,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:21,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:21,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:21,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:21,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:44:21,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:44:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:44:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:44:21,854 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-11-06 22:44:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:21,919 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-11-06 22:44:21,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:44:21,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-06 22:44:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:21,922 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:44:21,922 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:44:21,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:44:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:44:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-11-06 22:44:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:44:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-11-06 22:44:21,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-11-06 22:44:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:21,928 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-06 22:44:21,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:44:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-11-06 22:44:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:44:21,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:21,929 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:21,929 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:21,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-11-06 22:44:21,930 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:21,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:21,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:21,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:22,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:22,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:44:22,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:44:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:44:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:22,034 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-11-06 22:44:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:22,110 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-06 22:44:22,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:44:22,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-06 22:44:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:22,112 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:44:22,112 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:44:22,113 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 22:44:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:44:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-11-06 22:44:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:44:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-11-06 22:44:22,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-11-06 22:44:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:22,122 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-11-06 22:44:22,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:44:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-11-06 22:44:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:44:22,124 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:22,125 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:22,125 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:22,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-11-06 22:44:22,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:22,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:24,238 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2018-11-06 22:44:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:24,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:24,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:44:24,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:44:24,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:44:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:24,241 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-11-06 22:44:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:24,263 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-06 22:44:24,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:44:24,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-06 22:44:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:24,265 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:44:24,265 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:44:24,266 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:44:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-11-06 22:44:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:44:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-06 22:44:24,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-11-06 22:44:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:24,272 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-06 22:44:24,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:44:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-06 22:44:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:44:24,273 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:24,273 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:24,274 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:24,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-11-06 22:44:24,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:24,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:24,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:24,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:24,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:24,504 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 22:44:24,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:24,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:24,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:24,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:24,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:24,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:44:24,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:44:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:44:24,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:44:24,586 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-06 22:44:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:24,669 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-11-06 22:44:24,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:44:24,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-06 22:44:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:24,670 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:44:24,670 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:44:24,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:44:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:44:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-06 22:44:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:44:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-06 22:44:24,676 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-11-06 22:44:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:24,677 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-06 22:44:24,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:44:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-06 22:44:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:44:24,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:24,678 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:24,678 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:24,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-11-06 22:44:24,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:25,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:25,244 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 22:44:25,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:37,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-06 22:44:37,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:37,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:37,567 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2018-11-06 22:44:37,807 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-06 22:44:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 22:44:38,137 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:44:38,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-06 22:44:38,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:44:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:44:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:44:38,139 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-11-06 22:44:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:38,556 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-11-06 22:44:38,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:44:38,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-11-06 22:44:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:38,557 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:44:38,557 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:44:38,558 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:44:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:44:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-06 22:44:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:44:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-06 22:44:38,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2018-11-06 22:44:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:38,562 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-06 22:44:38,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:44:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-06 22:44:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:44:38,563 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:38,563 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:38,563 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:38,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:38,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-11-06 22:44:38,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:38,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:38,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:38,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:38,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:38,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:38,690 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 22:44:38,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:38,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:44:38,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:38,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:38,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:38,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:44:38,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:44:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:44:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:44:38,757 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-11-06 22:44:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:38,829 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-06 22:44:38,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:44:38,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-11-06 22:44:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:38,831 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:44:38,831 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:44:38,832 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:44:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:44:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-11-06 22:44:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:44:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:44:38,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-11-06 22:44:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:38,836 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:44:38,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:44:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:44:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:44:38,837 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:38,837 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:38,837 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:38,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-11-06 22:44:38,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:38,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:38,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:38,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:38,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:39,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:39,085 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 22:44:39,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:39,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:39,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:39,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:39,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:39,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:44:39,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:44:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:44:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:44:39,159 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-11-06 22:44:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:39,243 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:44:39,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:44:39,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-06 22:44:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:39,246 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:44:39,246 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:44:39,246 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:44:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:44:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-06 22:44:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:44:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-06 22:44:39,250 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-11-06 22:44:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:39,251 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-06 22:44:39,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:44:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-06 22:44:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:44:39,251 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:39,252 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:39,252 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:39,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-11-06 22:44:39,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:39,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:39,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:39,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:39,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:39,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:39,504 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 22:44:39,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:39,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:44:39,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:39,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:39,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:39,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:44:39,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:44:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:44:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:44:39,582 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-11-06 22:44:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:40,048 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-06 22:44:40,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:44:40,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-06 22:44:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:40,049 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:44:40,049 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:44:40,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:44:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:44:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-11-06 22:44:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:44:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:44:40,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-11-06 22:44:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:40,057 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:44:40,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:44:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:44:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:44:40,058 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:40,058 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:40,058 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:40,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-11-06 22:44:40,059 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:40,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:40,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:40,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:40,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:40,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:40,428 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 22:44:40,439 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:40,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:44:40,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:40,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:40,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:40,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:44:40,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:44:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:44:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:44:40,532 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-11-06 22:44:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:40,675 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:44:40,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:44:40,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-06 22:44:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:40,676 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:44:40,677 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:44:40,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:44:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:44:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-06 22:44:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:44:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-06 22:44:40,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-11-06 22:44:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:40,683 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-06 22:44:40,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:44:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-06 22:44:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:44:40,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:40,684 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:40,684 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:40,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-11-06 22:44:40,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:40,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:40,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:40,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:40,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:40,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:40,824 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 22:44:40,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:40,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:40,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:40,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:44:40,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:44:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:44:40,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:44:40,923 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-11-06 22:44:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:41,062 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-06 22:44:41,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:44:41,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-06 22:44:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:41,065 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:44:41,065 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:44:41,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:44:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:44:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-11-06 22:44:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:44:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:44:41,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-11-06 22:44:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:41,071 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:44:41,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:44:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:44:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:44:41,072 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:41,072 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:41,072 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:41,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-11-06 22:44:41,073 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:41,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:41,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:41,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:41,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:41,253 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 22:44:41,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:41,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:41,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:41,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:41,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:41,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:44:41,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:44:41,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:44:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:44:41,352 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-11-06 22:44:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:41,538 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:44:41,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:44:41,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-06 22:44:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:41,540 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:44:41,540 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:44:41,541 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:44:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:44:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-11-06 22:44:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:44:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-06 22:44:41,546 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-11-06 22:44:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:41,547 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-06 22:44:41,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:44:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-06 22:44:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:44:41,548 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:41,548 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:41,548 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:41,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-11-06 22:44:41,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:41,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:41,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:41,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:41,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:41,997 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 22:44:42,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:42,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:44:42,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:42,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:42,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:42,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:44:42,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:44:42,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:44:42,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:44:42,207 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-11-06 22:44:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:42,691 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-06 22:44:42,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:44:42,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-11-06 22:44:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:42,693 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:44:42,693 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:44:42,694 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:44:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:44:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-06 22:44:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:44:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:44:42,699 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-11-06 22:44:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:42,699 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:44:42,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:44:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:44:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:44:42,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:42,700 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:42,701 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:42,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-11-06 22:44:42,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:42,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:42,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:42,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:42,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:43,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:43,103 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 22:44:43,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:43,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:43,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:43,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:43,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:43,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:44:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:44:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:44:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:44:43,169 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-11-06 22:44:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:43,413 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:44:43,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:44:43,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-06 22:44:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:43,415 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:44:43,415 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:44:43,416 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:44:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:44:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-11-06 22:44:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:44:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-11-06 22:44:43,424 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-11-06 22:44:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:43,425 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-11-06 22:44:43,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:44:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-11-06 22:44:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:44:43,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:43,426 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:43,426 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:43,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:43,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-11-06 22:44:43,427 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:43,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:43,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:43,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:43,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:43,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:43,678 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 22:44:43,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:46,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:44:46,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:46,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:46,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:46,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:44:46,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:44:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:44:46,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:44:46,372 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-11-06 22:44:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:46,709 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-06 22:44:46,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:44:46,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-11-06 22:44:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:46,711 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:44:46,711 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:44:46,712 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:44:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:44:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-11-06 22:44:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:44:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:44:46,717 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-11-06 22:44:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:46,718 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:44:46,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:44:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:44:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:44:46,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:46,719 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:46,719 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:46,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-11-06 22:44:46,720 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:46,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:46,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:46,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:46,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:47,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:47,076 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 22:44:47,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:47,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:44:47,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:47,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:48,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:48,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:44:48,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:44:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:44:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:44:48,003 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-11-06 22:44:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:48,493 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:44:48,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:44:48,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-06 22:44:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:48,496 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:44:48,496 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:44:48,496 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:44:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:44:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-11-06 22:44:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:44:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-11-06 22:44:48,501 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-11-06 22:44:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:48,501 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-11-06 22:44:48,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:44:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-11-06 22:44:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:44:48,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:48,502 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:48,502 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:48,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-11-06 22:44:48,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:48,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:48,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:48,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:48,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:48,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:48,994 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 22:44:49,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:49,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:49,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:49,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:44:49,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:44:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:44:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:44:49,120 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-11-06 22:44:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:49,499 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-11-06 22:44:49,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:44:49,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-11-06 22:44:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:49,500 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:44:49,500 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:44:49,501 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:44:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:44:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-11-06 22:44:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:44:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:44:49,507 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-11-06 22:44:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:49,508 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:44:49,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:44:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:44:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:44:49,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:49,509 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:49,509 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:49,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-11-06 22:44:49,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:49,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:49,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:49,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:49,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:49,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:49,778 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:44:49,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:49,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:49,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:49,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:49,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:49,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:44:49,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:44:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:44:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:44:49,868 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-11-06 22:44:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:50,420 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:44:50,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:44:50,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-06 22:44:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:50,422 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:44:50,422 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:44:50,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:44:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:44:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-11-06 22:44:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-06 22:44:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-06 22:44:50,433 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-11-06 22:44:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:50,434 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-06 22:44:50,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:44:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-06 22:44:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:44:50,435 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:50,435 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:50,435 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:50,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-11-06 22:44:50,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:50,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:50,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:50,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:50,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:50,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:50,980 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 22:44:50,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:51,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:44:51,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:51,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:51,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:51,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:44:51,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:44:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:44:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:44:51,461 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-11-06 22:44:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:52,026 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-11-06 22:44:52,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:44:52,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-11-06 22:44:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:52,030 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:44:52,030 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:44:52,031 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:44:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:44:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-06 22:44:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-06 22:44:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-06 22:44:52,035 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-11-06 22:44:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:52,035 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-06 22:44:52,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:44:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-06 22:44:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:44:52,036 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:52,036 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:52,036 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:52,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-11-06 22:44:52,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:52,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:52,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:52,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:52,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:52,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:52,768 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 22:44:52,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:52,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:52,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:52,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:52,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:52,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:44:52,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:44:52,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:44:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:44:52,863 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-11-06 22:44:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:53,458 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:44:53,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:44:53,458 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-11-06 22:44:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:53,459 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:44:53,459 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:44:53,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:44:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:44:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-11-06 22:44:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:44:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-11-06 22:44:53,465 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-11-06 22:44:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:53,465 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-11-06 22:44:53,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:44:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-11-06 22:44:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:44:53,466 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:53,466 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:53,467 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:53,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:53,467 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-11-06 22:44:53,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:53,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:53,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:53,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:53,793 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 22:44:53,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:45:58,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:45:58,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:58,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:58,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:58,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:45:58,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:45:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:45:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:45:58,945 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-11-06 22:45:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:59,499 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-11-06 22:45:59,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:45:59,500 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-11-06 22:45:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:59,501 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:45:59,501 INFO L226 Difference]: Without dead ends: 63 [2018-11-06 22:45:59,502 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:45:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-06 22:45:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-11-06 22:45:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-06 22:45:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-11-06 22:45:59,507 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-11-06 22:45:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:59,507 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-11-06 22:45:59,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:45:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-11-06 22:45:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:45:59,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:59,509 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:59,509 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:59,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-11-06 22:45:59,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:59,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:59,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:59,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:59,998 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 22:46:00,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:46:01,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:46:01,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:01,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:01,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:01,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:46:01,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:46:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:46:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:46:01,499 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-11-06 22:46:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:02,036 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:46:02,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:46:02,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-11-06 22:46:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:02,037 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:46:02,038 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:46:02,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:46:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:46:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-11-06 22:46:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-06 22:46:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-11-06 22:46:02,043 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-11-06 22:46:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:02,043 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-11-06 22:46:02,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:46:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-11-06 22:46:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:46:02,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:02,044 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:02,045 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:02,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-11-06 22:46:02,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:02,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:02,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:02,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:02,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:02,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:02,594 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 22:46:02,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:02,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:02,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:02,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:46:02,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:46:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:46:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:46:02,661 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-11-06 22:46:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:03,259 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-11-06 22:46:03,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:46:03,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-11-06 22:46:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:03,261 INFO L225 Difference]: With dead ends: 73 [2018-11-06 22:46:03,261 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:46:03,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:46:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:46:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-11-06 22:46:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-06 22:46:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-11-06 22:46:03,266 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-11-06 22:46:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:03,266 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-11-06 22:46:03,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:46:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-11-06 22:46:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:46:03,267 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:03,267 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:03,267 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:03,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-11-06 22:46:03,267 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:03,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:03,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:03,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:03,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:03,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:03,958 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 22:46:03,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:46:03,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:46:03,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:03,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:04,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:04,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:46:04,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:46:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:46:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:46:04,029 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-11-06 22:46:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:04,725 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-11-06 22:46:04,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:46:04,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-11-06 22:46:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:04,726 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:46:04,726 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:46:04,727 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:46:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:46:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-11-06 22:46:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-06 22:46:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-11-06 22:46:04,731 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-11-06 22:46:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:04,731 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-11-06 22:46:04,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:46:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-11-06 22:46:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:46:04,732 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:04,732 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:04,732 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:04,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-11-06 22:46:04,733 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:04,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:04,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:04,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:04,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:05,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:05,316 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 22:46:05,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:46:11,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:46:11,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:11,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:11,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:11,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-06 22:46:11,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:46:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:46:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:46:11,795 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-11-06 22:46:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:12,477 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-11-06 22:46:12,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:46:12,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-11-06 22:46:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:12,478 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:46:12,478 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:46:12,479 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:46:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:46:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-11-06 22:46:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-06 22:46:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-11-06 22:46:12,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-11-06 22:46:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:12,484 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-11-06 22:46:12,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:46:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-11-06 22:46:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:46:12,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:12,484 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:12,484 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:12,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-11-06 22:46:12,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:12,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:12,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:12,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:12,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:13,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:13,550 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 22:46:13,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:46:13,581 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:46:13,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:13,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:13,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:13,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:46:13,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:46:13,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:46:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:46:13,626 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-11-06 22:46:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:14,387 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-11-06 22:46:14,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:46:14,388 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-06 22:46:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:14,389 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:46:14,389 INFO L226 Difference]: Without dead ends: 78 [2018-11-06 22:46:14,390 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:46:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-06 22:46:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-11-06 22:46:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-06 22:46:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-11-06 22:46:14,396 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-11-06 22:46:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:14,396 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-11-06 22:46:14,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:46:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-11-06 22:46:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-06 22:46:14,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:14,397 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:14,397 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:14,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1671499474, now seen corresponding path program 23 times [2018-11-06 22:46:14,398 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:14,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:14,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:14,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:14,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:15,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:15,541 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 22:46:15,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:48:03,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-06 22:48:03,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:48:03,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:48:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:04,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:48:04,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-06 22:48:04,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:48:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:48:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:48:04,051 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-11-06 22:48:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:48:04,890 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-11-06 22:48:04,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:48:04,890 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-11-06 22:48:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:48:04,891 INFO L225 Difference]: With dead ends: 85 [2018-11-06 22:48:04,892 INFO L226 Difference]: Without dead ends: 81 [2018-11-06 22:48:04,893 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:48:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-06 22:48:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-11-06 22:48:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-06 22:48:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-11-06 22:48:04,897 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-11-06 22:48:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:48:04,898 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-11-06 22:48:04,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:48:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-11-06 22:48:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-06 22:48:04,899 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:48:04,899 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-11-06 22:48:04,899 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:48:04,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:48:04,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1766571793, now seen corresponding path program 24 times [2018-11-06 22:48:04,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:48:04,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:48:04,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:04,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:48:04,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:48:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:05,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:48:05,707 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 22:48:05,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:00,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:49:00,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:00,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:00,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:00,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-06 22:49:00,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:49:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:49:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:49:00,524 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-11-06 22:49:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:01,382 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-11-06 22:49:01,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:49:01,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-11-06 22:49:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:01,384 INFO L225 Difference]: With dead ends: 88 [2018-11-06 22:49:01,384 INFO L226 Difference]: Without dead ends: 84 [2018-11-06 22:49:01,385 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:49:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-06 22:49:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-11-06 22:49:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-06 22:49:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-11-06 22:49:01,390 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-11-06 22:49:01,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:01,390 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-11-06 22:49:01,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:49:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-11-06 22:49:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-06 22:49:01,391 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:01,391 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:01,391 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:01,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1032388018, now seen corresponding path program 25 times [2018-11-06 22:49:01,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:01,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:01,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:01,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:01,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-06 22:49:01,483 WARN L187 SmtUtils]: Removed 3 from assertion stack [2018-11-06 22:49:01,484 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:49:01,489 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:49:01,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:49:01 BoogieIcfgContainer [2018-11-06 22:49:01,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:49:01,491 INFO L168 Benchmark]: Toolchain (without parser) took 281896.30 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -676.2 MB). Peak memory consumption was 366.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:49:01,492 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 22:49:01,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.14 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 22:49:01,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.70 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 22:49:01,498 INFO L168 Benchmark]: Boogie Preprocessor took 21.00 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 22:49:01,498 INFO L168 Benchmark]: RCFGBuilder took 316.32 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 731.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2018-11-06 22:49:01,499 INFO L168 Benchmark]: TraceAbstraction took 281220.78 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 311.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 94.8 MB). Peak memory consumption was 406.2 MB. Max. memory is 7.1 GB. [2018-11-06 22:49:01,504 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 299.14 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 34.70 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 21.00 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 316.32 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 731.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 281220.78 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 311.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 94.8 MB). Peak memory consumption was 406.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 83 with TraceHistMax 26,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 281.1s OverallTime, 32 OverallIterations, 26 TraceHistogramMax, 11.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 539 SDtfs, 48 SDslu, 6250 SDs, 0 SdLazy, 12194 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1511 GetRequests, 1108 SyntacticMatches, 58 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=31, 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: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 39 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 252.5s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 2253 NumberOfCodeBlocks, 2250 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 2195 ConstructedInterpolants, 0 QuantifiedInterpolants, 736669 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2203 ConjunctsInSsa, 699 ConjunctsInUnsatCore, 58 InterpolantComputations, 5 PerfectInterpolantSequences, 29/15062 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown