java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:40:13,497 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:40:13,499 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:40:13,511 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:40:13,512 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:40:13,513 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:40:13,514 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:40:13,516 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:40:13,518 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:40:13,519 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:40:13,520 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:40:13,520 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:40:13,521 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:40:13,522 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:40:13,523 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:40:13,529 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:40:13,530 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:40:13,535 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:40:13,540 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:40:13,544 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:40:13,546 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:40:13,548 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:40:13,552 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:40:13,570 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 09:40:13,603 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:40:13,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:40:13,604 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:40:13,607 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:40:13,608 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:40:13,608 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:40:13,608 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:40:13,608 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:40:13,609 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:40:13,609 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:40:13,609 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:40:13,609 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:40:13,609 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:40:13,610 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:40:13,612 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:40:13,612 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:40:13,612 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:40:13,612 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:40:13,613 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:40:13,613 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:40:13,613 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:40:13,613 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:40:13,613 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:40:13,614 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:40:13,614 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:40:13,614 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:40:13,614 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:40:13,614 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:40:13,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:40:13,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:40:13,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:40:13,685 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:40:13,686 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:40:13,686 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-10-23 09:40:13,747 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b95db1335/7ef7297633dc4801854eba1597b74bf2/FLAG7de75bc1e [2018-10-23 09:40:14,202 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:40:14,203 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-10-23 09:40:14,211 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b95db1335/7ef7297633dc4801854eba1597b74bf2/FLAG7de75bc1e [2018-10-23 09:40:14,226 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b95db1335/7ef7297633dc4801854eba1597b74bf2 [2018-10-23 09:40:14,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:40:14,239 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:40:14,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:14,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:40:14,244 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:40:14,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e63188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14, skipping insertion in model container [2018-10-23 09:40:14,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:40:14,287 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:40:14,562 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:14,570 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:40:14,614 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:14,630 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:40:14,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14 WrapperNode [2018-10-23 09:40:14,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:14,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:14,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:40:14,632 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:40:14,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:14,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:40:14,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:40:14,673 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:40:14,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... [2018-10-23 09:40:14,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:40:14,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:40:14,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:40:14,699 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:40:14,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:40:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:40:14,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:40:15,313 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:40:15,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:15 BoogieIcfgContainer [2018-10-23 09:40:15,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:40:15,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:40:15,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:40:15,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:40:15,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:40:14" (1/3) ... [2018-10-23 09:40:15,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b63cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:15, skipping insertion in model container [2018-10-23 09:40:15,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:14" (2/3) ... [2018-10-23 09:40:15,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b63cf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:15, skipping insertion in model container [2018-10-23 09:40:15,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:15" (3/3) ... [2018-10-23 09:40:15,323 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-10-23 09:40:15,332 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:40:15,340 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:40:15,357 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:40:15,391 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:40:15,392 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:40:15,392 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:40:15,392 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:40:15,392 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:40:15,392 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:40:15,393 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:40:15,393 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:40:15,393 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:40:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-10-23 09:40:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:15,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:15,416 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:15,418 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:15,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2018-10-23 09:40:15,426 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:15,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:15,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:15,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:15,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:15,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:15,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:40:15,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:40:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:40:15,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:15,614 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2018-10-23 09:40:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:15,858 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2018-10-23 09:40:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:40:15,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-10-23 09:40:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:15,880 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:40:15,881 INFO L226 Difference]: Without dead ends: 25 [2018-10-23 09:40:15,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-23 09:40:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-23 09:40:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 09:40:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2018-10-23 09:40:15,923 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2018-10-23 09:40:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:15,924 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-10-23 09:40:15,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:40:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2018-10-23 09:40:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:15,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:15,925 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:15,925 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:15,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2018-10-23 09:40:15,926 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:15,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:15,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:15,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:15,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:16,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:16,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 09:40:16,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 09:40:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 09:40:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:40:16,033 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2018-10-23 09:40:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:16,325 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2018-10-23 09:40:16,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 09:40:16,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-23 09:40:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:16,326 INFO L225 Difference]: With dead ends: 44 [2018-10-23 09:40:16,327 INFO L226 Difference]: Without dead ends: 25 [2018-10-23 09:40:16,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:40:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-23 09:40:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-23 09:40:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 09:40:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2018-10-23 09:40:16,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2018-10-23 09:40:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:16,334 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2018-10-23 09:40:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 09:40:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2018-10-23 09:40:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:16,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:16,336 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:16,336 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:16,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2018-10-23 09:40:16,337 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:16,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:16,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:16,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:16,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:40:16,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:40:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:40:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:16,396 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 3 states. [2018-10-23 09:40:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:16,642 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2018-10-23 09:40:16,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:40:16,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-10-23 09:40:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:16,645 INFO L225 Difference]: With dead ends: 54 [2018-10-23 09:40:16,645 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:40:16,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:40:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-23 09:40:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-23 09:40:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2018-10-23 09:40:16,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2018-10-23 09:40:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:16,654 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2018-10-23 09:40:16,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:40:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2018-10-23 09:40:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:16,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:16,655 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:16,655 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:16,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2018-10-23 09:40:16,656 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:16,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:16,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:16,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:16,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:16,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 09:40:16,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 09:40:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 09:40:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:40:16,755 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 6 states. [2018-10-23 09:40:16,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:16,969 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2018-10-23 09:40:16,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:40:16,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-10-23 09:40:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:16,971 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:40:16,971 INFO L226 Difference]: Without dead ends: 35 [2018-10-23 09:40:16,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:40:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-23 09:40:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-23 09:40:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 09:40:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2018-10-23 09:40:16,984 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2018-10-23 09:40:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:16,985 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2018-10-23 09:40:16,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 09:40:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2018-10-23 09:40:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:16,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:16,987 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:16,988 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:16,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2018-10-23 09:40:16,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:16,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:16,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:16,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:16,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:17,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:17,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-23 09:40:17,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 09:40:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 09:40:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:40:17,404 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2018-10-23 09:40:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:17,599 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-23 09:40:17,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 09:40:17,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-10-23 09:40:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:17,601 INFO L225 Difference]: With dead ends: 44 [2018-10-23 09:40:17,601 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 09:40:17,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:40:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 09:40:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-23 09:40:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 09:40:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-10-23 09:40:17,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2018-10-23 09:40:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:17,608 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-10-23 09:40:17,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 09:40:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-10-23 09:40:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:17,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:17,609 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:17,609 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:17,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2018-10-23 09:40:17,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:17,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:17,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:17,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:17,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:17,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:17,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:40:17,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:40:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:40:17,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:17,674 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2018-10-23 09:40:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:17,770 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-23 09:40:17,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:40:17,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-10-23 09:40:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:17,772 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:40:17,772 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 09:40:17,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 09:40:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-23 09:40:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 09:40:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-10-23 09:40:17,778 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2018-10-23 09:40:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:17,778 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-10-23 09:40:17,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:40:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-10-23 09:40:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 09:40:17,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:17,780 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:17,780 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:17,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2018-10-23 09:40:17,780 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:17,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:17,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:17,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:17,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:17,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:17,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-23 09:40:17,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:40:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:40:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:40:17,912 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 11 states. [2018-10-23 09:40:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:18,106 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-10-23 09:40:18,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 09:40:18,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-10-23 09:40:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:18,108 INFO L225 Difference]: With dead ends: 36 [2018-10-23 09:40:18,108 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 09:40:18,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:40:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 09:40:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-23 09:40:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 09:40:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-23 09:40:18,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2018-10-23 09:40:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:18,114 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-23 09:40:18,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:40:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-23 09:40:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:40:18,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:18,115 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:18,116 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:18,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2018-10-23 09:40:18,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:18,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:18,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:18,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:18,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:18,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-23 09:40:18,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 09:40:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 09:40:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:40:18,295 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2018-10-23 09:40:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:18,516 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-23 09:40:18,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 09:40:18,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-10-23 09:40:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:18,518 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:40:18,518 INFO L226 Difference]: Without dead ends: 29 [2018-10-23 09:40:18,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:40:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-23 09:40:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-23 09:40:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 09:40:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-23 09:40:18,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2018-10-23 09:40:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:18,525 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-23 09:40:18,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 09:40:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-23 09:40:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-23 09:40:18,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:18,526 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:18,526 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:18,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2018-10-23 09:40:18,527 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:18,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:18,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:18,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:18,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:18,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:18,870 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:18,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:18,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:18,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:18,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-23 09:40:18,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:40:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:40:18,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:40:18,971 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2018-10-23 09:40:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:19,532 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-23 09:40:19,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 09:40:19,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-10-23 09:40:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:19,538 INFO L225 Difference]: With dead ends: 36 [2018-10-23 09:40:19,538 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 09:40:19,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:40:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 09:40:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-23 09:40:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 09:40:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-23 09:40:19,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2018-10-23 09:40:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:19,544 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-23 09:40:19,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:40:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-23 09:40:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 09:40:19,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:19,545 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:19,545 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:19,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash 756112099, now seen corresponding path program 2 times [2018-10-23 09:40:19,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:19,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:19,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:19,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:19,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:19,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:19,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:19,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:19,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:19,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:19,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:19,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:19,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-23 09:40:19,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 09:40:19,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 09:40:19,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:40:19,819 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 14 states. [2018-10-23 09:40:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:19,956 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-23 09:40:19,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 09:40:19,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-10-23 09:40:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:19,958 INFO L225 Difference]: With dead ends: 38 [2018-10-23 09:40:19,958 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 09:40:19,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:40:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 09:40:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-23 09:40:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-23 09:40:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-23 09:40:19,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-10-23 09:40:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:19,965 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-23 09:40:19,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 09:40:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-23 09:40:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:40:19,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:19,966 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:19,966 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:19,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 3 times [2018-10-23 09:40:19,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:19,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:19,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:19,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:19,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:20,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:20,255 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:20,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:20,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 09:40:20,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:20,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-23 09:40:20,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:20,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2018-10-23 09:40:20,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:40:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:40:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:40:20,365 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-23 09:40:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:20,499 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-10-23 09:40:20,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 09:40:20,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2018-10-23 09:40:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:20,502 INFO L225 Difference]: With dead ends: 42 [2018-10-23 09:40:20,502 INFO L226 Difference]: Without dead ends: 37 [2018-10-23 09:40:20,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:40:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-23 09:40:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-10-23 09:40:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-23 09:40:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-23 09:40:20,507 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2018-10-23 09:40:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:20,508 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-23 09:40:20,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:40:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-23 09:40:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-23 09:40:20,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:20,509 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:20,509 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:20,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:20,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419607, now seen corresponding path program 4 times [2018-10-23 09:40:20,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:20,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:20,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:20,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:20,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-23 09:40:20,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:20,745 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:20,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:20,771 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:20,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:20,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-23 09:40:20,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:20,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-23 09:40:20,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 09:40:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 09:40:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:40:20,811 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2018-10-23 09:40:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:21,069 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-23 09:40:21,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:40:21,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2018-10-23 09:40:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:21,072 INFO L225 Difference]: With dead ends: 44 [2018-10-23 09:40:21,072 INFO L226 Difference]: Without dead ends: 38 [2018-10-23 09:40:21,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:40:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-23 09:40:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-23 09:40:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 09:40:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-23 09:40:21,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2018-10-23 09:40:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:21,077 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-23 09:40:21,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 09:40:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-23 09:40:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 09:40:21,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:21,079 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:21,079 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:21,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash 516774580, now seen corresponding path program 5 times [2018-10-23 09:40:21,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:21,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:21,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:21,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:21,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-23 09:40:21,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:21,324 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:21,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:21,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-23 09:40:21,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:21,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-23 09:40:21,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:21,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2018-10-23 09:40:21,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 09:40:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 09:40:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:40:21,602 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 21 states. [2018-10-23 09:40:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:21,862 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-10-23 09:40:21,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 09:40:21,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2018-10-23 09:40:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:21,864 INFO L225 Difference]: With dead ends: 51 [2018-10-23 09:40:21,865 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 09:40:21,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:40:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 09:40:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-23 09:40:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 09:40:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-23 09:40:21,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2018-10-23 09:40:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:21,872 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-23 09:40:21,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 09:40:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-23 09:40:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:40:21,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:21,873 INFO L375 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:21,873 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:21,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2055346949, now seen corresponding path program 6 times [2018-10-23 09:40:21,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:21,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:21,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:21,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:21,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 09:40:22,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:22,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:22,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:22,249 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-23 09:40:22,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:22,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 09:40:22,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:22,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-23 09:40:22,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 09:40:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 09:40:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:40:22,307 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2018-10-23 09:40:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:22,632 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-23 09:40:22,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:40:22,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2018-10-23 09:40:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:22,634 INFO L225 Difference]: With dead ends: 56 [2018-10-23 09:40:22,634 INFO L226 Difference]: Without dead ends: 46 [2018-10-23 09:40:22,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:40:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-23 09:40:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-23 09:40:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-23 09:40:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-23 09:40:22,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2018-10-23 09:40:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:22,641 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-23 09:40:22,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 09:40:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-23 09:40:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-23 09:40:22,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:22,642 INFO L375 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:22,643 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:22,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash -891324766, now seen corresponding path program 7 times [2018-10-23 09:40:22,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:22,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:22,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 09:40:22,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:22,906 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:22,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:22,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 09:40:22,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:22,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-23 09:40:22,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:40:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:40:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:40:22,975 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 19 states. [2018-10-23 09:40:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:23,144 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2018-10-23 09:40:23,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:40:23,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2018-10-23 09:40:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:23,145 INFO L225 Difference]: With dead ends: 58 [2018-10-23 09:40:23,146 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:40:23,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:40:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:40:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-23 09:40:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 09:40:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-23 09:40:23,152 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-10-23 09:40:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:23,153 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-23 09:40:23,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:40:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-23 09:40:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 09:40:23,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:23,156 INFO L375 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:23,157 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:23,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572479, now seen corresponding path program 8 times [2018-10-23 09:40:23,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:23,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:23,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 09:40:23,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:23,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:23,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:23,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:23,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:23,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-23 09:40:23,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:23,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2018-10-23 09:40:23,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 09:40:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 09:40:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:23,682 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2018-10-23 09:40:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:24,315 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-10-23 09:40:24,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:40:24,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2018-10-23 09:40:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:24,316 INFO L225 Difference]: With dead ends: 65 [2018-10-23 09:40:24,316 INFO L226 Difference]: Without dead ends: 55 [2018-10-23 09:40:24,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-23 09:40:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-10-23 09:40:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-23 09:40:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-23 09:40:24,323 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2018-10-23 09:40:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:24,324 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-23 09:40:24,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 09:40:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-23 09:40:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 09:40:24,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:24,325 INFO L375 BasicCegarLoop]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:24,325 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:24,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash 512283024, now seen corresponding path program 9 times [2018-10-23 09:40:24,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:24,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:24,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:24,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-10-23 09:40:24,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:24,613 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:24,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:24,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-23 09:40:24,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:24,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-23 09:40:24,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:24,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2018-10-23 09:40:24,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:40:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:40:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:24,818 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 28 states. [2018-10-23 09:40:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:25,039 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-10-23 09:40:25,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:40:25,040 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2018-10-23 09:40:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:25,041 INFO L225 Difference]: With dead ends: 73 [2018-10-23 09:40:25,041 INFO L226 Difference]: Without dead ends: 59 [2018-10-23 09:40:25,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-23 09:40:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-10-23 09:40:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-23 09:40:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-23 09:40:25,047 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-10-23 09:40:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:25,048 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-23 09:40:25,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:40:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-23 09:40:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-23 09:40:25,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:25,049 INFO L375 BasicCegarLoop]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:25,049 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:25,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash 632258215, now seen corresponding path program 10 times [2018-10-23 09:40:25,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:25,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:25,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:25,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 09:40:25,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:25,365 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:25,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:25,395 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:25,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:25,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 09:40:25,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:25,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-23 09:40:25,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:40:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:40:25,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:25,450 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 22 states. [2018-10-23 09:40:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:25,935 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-10-23 09:40:25,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:40:25,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2018-10-23 09:40:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:25,937 INFO L225 Difference]: With dead ends: 76 [2018-10-23 09:40:25,937 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 09:40:25,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 09:40:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-23 09:40:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-23 09:40:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-23 09:40:25,943 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-10-23 09:40:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:25,943 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-23 09:40:25,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:40:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-23 09:40:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-23 09:40:25,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:25,944 INFO L375 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:25,945 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:25,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 698467204, now seen corresponding path program 11 times [2018-10-23 09:40:25,945 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 09:40:26,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:26,241 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:26,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:26,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-23 09:40:26,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:26,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 170 proven. 64 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-23 09:40:26,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:26,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2018-10-23 09:40:26,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:40:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:40:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:26,699 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 32 states. [2018-10-23 09:40:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:26,989 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-10-23 09:40:26,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:40:26,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 59 [2018-10-23 09:40:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:26,990 INFO L225 Difference]: With dead ends: 83 [2018-10-23 09:40:26,990 INFO L226 Difference]: Without dead ends: 67 [2018-10-23 09:40:26,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-23 09:40:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-10-23 09:40:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-23 09:40:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-23 09:40:26,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 59 [2018-10-23 09:40:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:26,997 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-23 09:40:26,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:40:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-23 09:40:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-23 09:40:26,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:26,998 INFO L375 BasicCegarLoop]: trace histogram [21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:26,998 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:26,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 486303765, now seen corresponding path program 12 times [2018-10-23 09:40:26,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:26,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:27,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 221 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:27,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:27,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:27,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:27,407 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-23 09:40:27,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:27,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 221 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:27,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:27,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-23 09:40:27,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 09:40:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 09:40:27,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:40:27,454 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2018-10-23 09:40:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:27,634 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-10-23 09:40:27,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 09:40:27,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-23 09:40:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:27,636 INFO L225 Difference]: With dead ends: 88 [2018-10-23 09:40:27,636 INFO L226 Difference]: Without dead ends: 68 [2018-10-23 09:40:27,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:40:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-23 09:40:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-23 09:40:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 09:40:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-23 09:40:27,643 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2018-10-23 09:40:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:27,643 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-23 09:40:27,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 09:40:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-23 09:40:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 09:40:27,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:27,644 INFO L375 BasicCegarLoop]: trace histogram [22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:27,644 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:27,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash 998146034, now seen corresponding path program 13 times [2018-10-23 09:40:27,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:27,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:27,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:28,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:28,224 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:28,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:28,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:28,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:28,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-23 09:40:28,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:40:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:40:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:28,292 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2018-10-23 09:40:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:28,495 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-23 09:40:28,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 09:40:28,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2018-10-23 09:40:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:28,497 INFO L225 Difference]: With dead ends: 90 [2018-10-23 09:40:28,497 INFO L226 Difference]: Without dead ends: 70 [2018-10-23 09:40:28,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-23 09:40:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-23 09:40:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-23 09:40:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-23 09:40:28,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2018-10-23 09:40:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:28,503 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-23 09:40:28,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:40:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-23 09:40:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-23 09:40:28,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:28,505 INFO L375 BasicCegarLoop]: trace histogram [23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:28,505 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:28,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1042672497, now seen corresponding path program 14 times [2018-10-23 09:40:28,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:28,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:28,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:28,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 255 proven. 210 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:29,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:29,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:29,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:29,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:29,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:29,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 255 proven. 210 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:29,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:29,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-23 09:40:29,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 09:40:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 09:40:29,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:29,914 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 26 states. [2018-10-23 09:40:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:30,153 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-23 09:40:30,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:40:30,154 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2018-10-23 09:40:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:30,154 INFO L225 Difference]: With dead ends: 92 [2018-10-23 09:40:30,155 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 09:40:30,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 09:40:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-23 09:40:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-23 09:40:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-23 09:40:30,160 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-10-23 09:40:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:30,160 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-23 09:40:30,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 09:40:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-23 09:40:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-23 09:40:30,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:30,162 INFO L375 BasicCegarLoop]: trace histogram [24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:30,162 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:30,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 530773484, now seen corresponding path program 15 times [2018-10-23 09:40:30,162 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:30,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:30,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:30,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:30,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-23 09:40:30,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:30,566 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:30,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:30,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-23 09:40:30,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:30,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 81 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-23 09:40:31,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:31,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 37 [2018-10-23 09:40:31,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:40:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:40:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:31,529 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 37 states. [2018-10-23 09:40:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:31,786 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2018-10-23 09:40:31,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:40:31,787 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 71 [2018-10-23 09:40:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:31,788 INFO L225 Difference]: With dead ends: 97 [2018-10-23 09:40:31,788 INFO L226 Difference]: Without dead ends: 77 [2018-10-23 09:40:31,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-23 09:40:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-10-23 09:40:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-23 09:40:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-23 09:40:31,793 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-10-23 09:40:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:31,794 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-23 09:40:31,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:40:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-23 09:40:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-23 09:40:31,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:31,794 INFO L375 BasicCegarLoop]: trace histogram [26, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:31,795 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:31,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1675169475, now seen corresponding path program 16 times [2018-10-23 09:40:31,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:31,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:31,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:31,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-23 09:40:32,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:32,383 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:32,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:32,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:32,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:32,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-23 09:40:32,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:32,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-23 09:40:32,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:40:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:40:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:32,453 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 28 states. [2018-10-23 09:40:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:32,619 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-10-23 09:40:32,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:40:32,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2018-10-23 09:40:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:32,620 INFO L225 Difference]: With dead ends: 100 [2018-10-23 09:40:32,620 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 09:40:32,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 09:40:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-23 09:40:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-23 09:40:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-23 09:40:32,624 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-10-23 09:40:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:32,625 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-23 09:40:32,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:40:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-23 09:40:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-23 09:40:32,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:32,626 INFO L375 BasicCegarLoop]: trace histogram [27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:32,626 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:32,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash -581388704, now seen corresponding path program 17 times [2018-10-23 09:40:32,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:32,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:32,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:32,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:32,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-23 09:40:33,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:33,102 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:33,111 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:33,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-23 09:40:33,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:33,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 169 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-23 09:40:33,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:33,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2018-10-23 09:40:33,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:40:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:40:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:40:33,543 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 43 states. [2018-10-23 09:40:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:33,768 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2018-10-23 09:40:33,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:40:33,769 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 77 [2018-10-23 09:40:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:33,770 INFO L225 Difference]: With dead ends: 111 [2018-10-23 09:40:33,770 INFO L226 Difference]: Without dead ends: 89 [2018-10-23 09:40:33,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:40:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-23 09:40:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-10-23 09:40:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-23 09:40:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-23 09:40:33,775 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 77 [2018-10-23 09:40:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:33,775 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-23 09:40:33,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:40:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-23 09:40:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-23 09:40:33,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:33,776 INFO L375 BasicCegarLoop]: trace histogram [32, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:33,777 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:33,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash -467322203, now seen corresponding path program 18 times [2018-10-23 09:40:33,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:33,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:33,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:33,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 513 proven. 342 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-10-23 09:40:34,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:34,513 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:34,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:34,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-23 09:40:34,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:34,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 527 proven. 225 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-23 09:40:35,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:35,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18] total 46 [2018-10-23 09:40:35,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:40:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:40:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:40:35,093 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 46 states. [2018-10-23 09:40:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:35,390 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-10-23 09:40:35,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:40:35,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 87 [2018-10-23 09:40:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:35,392 INFO L225 Difference]: With dead ends: 125 [2018-10-23 09:40:35,392 INFO L226 Difference]: Without dead ends: 95 [2018-10-23 09:40:35,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:40:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-23 09:40:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-10-23 09:40:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-23 09:40:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-23 09:40:35,399 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 87 [2018-10-23 09:40:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-23 09:40:35,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:40:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-23 09:40:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-23 09:40:35,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:35,400 INFO L375 BasicCegarLoop]: trace histogram [35, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:35,401 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:35,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1219770058, now seen corresponding path program 19 times [2018-10-23 09:40:35,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:35,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:35,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:35,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:35,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 620 proven. 380 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-10-23 09:40:36,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:36,129 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:36,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:36,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 620 proven. 380 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-10-23 09:40:36,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:36,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-23 09:40:36,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:40:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:40:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:40:36,213 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 31 states. [2018-10-23 09:40:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:36,383 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2018-10-23 09:40:36,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 09:40:36,383 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 93 [2018-10-23 09:40:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:36,385 INFO L225 Difference]: With dead ends: 130 [2018-10-23 09:40:36,385 INFO L226 Difference]: Without dead ends: 96 [2018-10-23 09:40:36,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:40:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-23 09:40:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-23 09:40:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-23 09:40:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-23 09:40:36,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-10-23 09:40:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:36,392 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-23 09:40:36,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:40:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-23 09:40:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-23 09:40:36,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:36,393 INFO L375 BasicCegarLoop]: trace histogram [36, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:36,395 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:36,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1236425837, now seen corresponding path program 20 times [2018-10-23 09:40:36,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:36,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:36,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:36,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 651 proven. 420 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-10-23 09:40:36,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:36,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:36,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:36,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:36,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:36,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 651 proven. 420 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-10-23 09:40:36,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:36,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-23 09:40:36,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:40:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:40:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:36,949 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 32 states. [2018-10-23 09:40:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:37,114 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-23 09:40:37,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:40:37,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 95 [2018-10-23 09:40:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:37,115 INFO L225 Difference]: With dead ends: 132 [2018-10-23 09:40:37,115 INFO L226 Difference]: Without dead ends: 98 [2018-10-23 09:40:37,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-23 09:40:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-23 09:40:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-23 09:40:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-23 09:40:37,120 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2018-10-23 09:40:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:37,121 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-23 09:40:37,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:40:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-23 09:40:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-23 09:40:37,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:37,121 INFO L375 BasicCegarLoop]: trace histogram [37, 21, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:37,121 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:37,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash -62760272, now seen corresponding path program 21 times [2018-10-23 09:40:37,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:37,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:37,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:37,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:37,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 682 proven. 462 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2018-10-23 09:40:37,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:37,724 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:37,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:37,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-23 09:40:37,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:37,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 256 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-23 09:40:38,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:38,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-10-23 09:40:38,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 09:40:38,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 09:40:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:40:38,335 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 50 states. [2018-10-23 09:40:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:38,981 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2018-10-23 09:40:38,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 09:40:38,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-10-23 09:40:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:38,983 INFO L225 Difference]: With dead ends: 137 [2018-10-23 09:40:38,983 INFO L226 Difference]: Without dead ends: 103 [2018-10-23 09:40:38,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:40:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-23 09:40:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-23 09:40:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-23 09:40:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-23 09:40:38,990 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2018-10-23 09:40:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:38,990 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-23 09:40:38,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 09:40:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-23 09:40:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-23 09:40:38,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:38,991 INFO L375 BasicCegarLoop]: trace histogram [39, 22, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:38,991 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:38,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash 889014343, now seen corresponding path program 22 times [2018-10-23 09:40:38,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:38,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:38,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:38,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:38,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 759 proven. 506 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 09:40:39,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:39,738 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:39,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:39,775 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:39,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:39,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 759 proven. 506 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 09:40:39,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:39,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-23 09:40:39,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 09:40:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 09:40:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:39,816 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 34 states. [2018-10-23 09:40:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:39,983 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-23 09:40:39,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:40:39,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 101 [2018-10-23 09:40:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:39,985 INFO L225 Difference]: With dead ends: 140 [2018-10-23 09:40:39,985 INFO L226 Difference]: Without dead ends: 104 [2018-10-23 09:40:39,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-23 09:40:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-23 09:40:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-23 09:40:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-23 09:40:39,991 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2018-10-23 09:40:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:39,992 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-23 09:40:39,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 09:40:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-23 09:40:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-23 09:40:39,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:39,993 INFO L375 BasicCegarLoop]: trace histogram [40, 23, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:39,993 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:39,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash -966691420, now seen corresponding path program 23 times [2018-10-23 09:40:39,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:39,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:39,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:39,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 792 proven. 552 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 09:40:40,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:40,485 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:40,492 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:40,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-10-23 09:40:40,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:40,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 819 proven. 361 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-23 09:40:41,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:41,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22] total 55 [2018-10-23 09:40:41,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-23 09:40:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-23 09:40:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:40:41,234 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 55 states. [2018-10-23 09:40:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:42,450 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2018-10-23 09:40:42,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-23 09:40:42,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 103 [2018-10-23 09:40:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:42,451 INFO L225 Difference]: With dead ends: 149 [2018-10-23 09:40:42,451 INFO L226 Difference]: Without dead ends: 113 [2018-10-23 09:40:42,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:40:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-23 09:40:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-10-23 09:40:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-23 09:40:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-23 09:40:42,458 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 103 [2018-10-23 09:40:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:42,459 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-23 09:40:42,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-23 09:40:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-23 09:40:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-23 09:40:42,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:42,460 INFO L375 BasicCegarLoop]: trace histogram [44, 24, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:42,460 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:42,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 97170031, now seen corresponding path program 24 times [2018-10-23 09:40:42,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:42,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:42,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:42,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:42,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 975 proven. 600 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-10-23 09:40:46,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:46,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:46,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:46,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-23 09:40:46,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:46,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 989 proven. 441 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-23 09:40:47,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:47,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24] total 58 [2018-10-23 09:40:47,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-23 09:40:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-23 09:40:47,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:40:47,480 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 58 states. [2018-10-23 09:40:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:47,729 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-10-23 09:40:47,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-23 09:40:47,730 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 111 [2018-10-23 09:40:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:47,731 INFO L225 Difference]: With dead ends: 161 [2018-10-23 09:40:47,731 INFO L226 Difference]: Without dead ends: 119 [2018-10-23 09:40:47,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:40:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-23 09:40:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-10-23 09:40:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-23 09:40:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-23 09:40:47,738 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 111 [2018-10-23 09:40:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:47,739 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-23 09:40:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-23 09:40:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-23 09:40:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-23 09:40:47,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:47,740 INFO L375 BasicCegarLoop]: trace histogram [47, 25, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:47,740 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:47,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1144748800, now seen corresponding path program 25 times [2018-10-23 09:40:47,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:47,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:47,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:47,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1118 proven. 650 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 09:40:48,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:48,508 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:48,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:48,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1118 proven. 650 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 09:40:48,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:48,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-23 09:40:48,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:40:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:40:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:48,594 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 37 states. [2018-10-23 09:40:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:48,764 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2018-10-23 09:40:48,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:40:48,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 117 [2018-10-23 09:40:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:48,765 INFO L225 Difference]: With dead ends: 166 [2018-10-23 09:40:48,765 INFO L226 Difference]: Without dead ends: 120 [2018-10-23 09:40:48,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-23 09:40:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-23 09:40:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-23 09:40:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-23 09:40:48,771 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-10-23 09:40:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:48,772 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-23 09:40:48,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:40:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-23 09:40:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-23 09:40:48,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:48,773 INFO L375 BasicCegarLoop]: trace histogram [48, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:48,773 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:48,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 786716765, now seen corresponding path program 26 times [2018-10-23 09:40:48,773 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:48,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:48,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:48,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:48,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 09:40:49,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:49,886 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:49,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:49,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:49,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:49,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 09:40:49,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:49,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-23 09:40:49,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-23 09:40:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-23 09:40:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:40:49,990 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 38 states. [2018-10-23 09:40:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:50,276 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-23 09:40:50,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-23 09:40:50,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2018-10-23 09:40:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:50,278 INFO L225 Difference]: With dead ends: 168 [2018-10-23 09:40:50,278 INFO L226 Difference]: Without dead ends: 122 [2018-10-23 09:40:50,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:40:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-23 09:40:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-23 09:40:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-23 09:40:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-10-23 09:40:50,285 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2018-10-23 09:40:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:50,285 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-10-23 09:40:50,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-23 09:40:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-10-23 09:40:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-23 09:40:50,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:50,286 INFO L375 BasicCegarLoop]: trace histogram [49, 27, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:50,287 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:50,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1499252858, now seen corresponding path program 27 times [2018-10-23 09:40:50,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:50,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:50,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:50,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:50,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-10-23 09:40:50,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:50,954 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:50,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:51,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-23 09:40:51,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:51,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1215 proven. 484 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-23 09:40:51,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:51,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 25] total 62 [2018-10-23 09:40:51,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-23 09:40:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-23 09:40:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:40:51,843 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 62 states. [2018-10-23 09:40:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:52,367 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2018-10-23 09:40:52,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-23 09:40:52,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-10-23 09:40:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:52,368 INFO L225 Difference]: With dead ends: 173 [2018-10-23 09:40:52,368 INFO L226 Difference]: Without dead ends: 127 [2018-10-23 09:40:52,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:40:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-23 09:40:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-10-23 09:40:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-23 09:40:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-23 09:40:52,375 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 121 [2018-10-23 09:40:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:52,376 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-23 09:40:52,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-23 09:40:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-23 09:40:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-23 09:40:52,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:52,377 INFO L375 BasicCegarLoop]: trace histogram [51, 28, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:52,377 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:52,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash -818764655, now seen corresponding path program 28 times [2018-10-23 09:40:52,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:52,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:52,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:52,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:52,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1305 proven. 812 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-23 09:40:53,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:53,077 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:53,085 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:53,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:53,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:53,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1305 proven. 812 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-23 09:40:53,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:53,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-23 09:40:53,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:40:53,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:40:53,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:53,173 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 40 states. [2018-10-23 09:40:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:53,421 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-23 09:40:53,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:40:53,421 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 125 [2018-10-23 09:40:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:53,422 INFO L225 Difference]: With dead ends: 176 [2018-10-23 09:40:53,423 INFO L226 Difference]: Without dead ends: 128 [2018-10-23 09:40:53,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-23 09:40:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-23 09:40:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-23 09:40:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-23 09:40:53,428 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2018-10-23 09:40:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:53,429 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-23 09:40:53,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:40:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-23 09:40:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-23 09:40:53,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:53,430 INFO L375 BasicCegarLoop]: trace histogram [52, 29, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:53,430 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:53,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -139736338, now seen corresponding path program 29 times [2018-10-23 09:40:53,431 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:53,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:53,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-23 09:40:55,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:55,397 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:55,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:55,470 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2018-10-23 09:40:55,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:55,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1377 proven. 625 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-23 09:40:56,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:56,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 67 [2018-10-23 09:40:56,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-23 09:40:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-23 09:40:56,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:40:56,501 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 67 states. [2018-10-23 09:40:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:56,795 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2018-10-23 09:40:56,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-23 09:40:56,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 127 [2018-10-23 09:40:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:56,797 INFO L225 Difference]: With dead ends: 185 [2018-10-23 09:40:56,797 INFO L226 Difference]: Without dead ends: 137 [2018-10-23 09:40:56,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:40:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-23 09:40:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2018-10-23 09:40:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-23 09:40:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-23 09:40:56,802 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 127 [2018-10-23 09:40:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:56,802 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-23 09:40:56,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-23 09:40:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-23 09:40:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-23 09:40:56,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:56,803 INFO L375 BasicCegarLoop]: trace histogram [56, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:56,803 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:56,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 651845945, now seen corresponding path program 30 times [2018-10-23 09:40:56,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:56,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:56,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:56,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1581 proven. 930 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-10-23 09:40:57,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:57,559 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:40:57,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:57,650 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-23 09:40:57,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:57,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1595 proven. 729 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-23 09:40:58,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:58,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30] total 70 [2018-10-23 09:40:58,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-23 09:40:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-23 09:40:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:40:58,763 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 70 states. [2018-10-23 09:40:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:59,067 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-10-23 09:40:59,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-23 09:40:59,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 135 [2018-10-23 09:40:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:59,068 INFO L225 Difference]: With dead ends: 197 [2018-10-23 09:40:59,068 INFO L226 Difference]: Without dead ends: 143 [2018-10-23 09:40:59,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:40:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-23 09:40:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-10-23 09:40:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-23 09:40:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-23 09:40:59,074 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 135 [2018-10-23 09:40:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:59,075 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-23 09:40:59,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-23 09:40:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-23 09:40:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-23 09:40:59,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:59,075 INFO L375 BasicCegarLoop]: trace histogram [59, 31, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:59,076 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:59,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1792604106, now seen corresponding path program 31 times [2018-10-23 09:40:59,076 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:59,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:59,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:59,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:59,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1760 proven. 992 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-10-23 09:41:00,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:00,284 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:00,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:00,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1760 proven. 992 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-10-23 09:41:00,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:00,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-23 09:41:00,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:41:00,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:41:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:00,407 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 43 states. [2018-10-23 09:41:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:00,704 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2018-10-23 09:41:00,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:41:00,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 141 [2018-10-23 09:41:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:00,706 INFO L225 Difference]: With dead ends: 202 [2018-10-23 09:41:00,706 INFO L226 Difference]: Without dead ends: 144 [2018-10-23 09:41:00,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-23 09:41:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-23 09:41:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-23 09:41:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-23 09:41:00,712 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-10-23 09:41:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-23 09:41:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:41:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-23 09:41:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-23 09:41:00,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:00,714 INFO L375 BasicCegarLoop]: trace histogram [60, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:00,714 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:00,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:00,714 INFO L82 PathProgramCache]: Analyzing trace with hash 100385831, now seen corresponding path program 32 times [2018-10-23 09:41:00,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:00,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:00,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:00,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:00,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-10-23 09:41:01,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:01,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:01,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:01,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:01,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:01,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-10-23 09:41:01,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:01,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-23 09:41:01,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-23 09:41:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-23 09:41:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:41:01,616 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 44 states. [2018-10-23 09:41:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:01,881 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-23 09:41:01,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-23 09:41:01,881 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 143 [2018-10-23 09:41:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:01,882 INFO L225 Difference]: With dead ends: 204 [2018-10-23 09:41:01,882 INFO L226 Difference]: Without dead ends: 146 [2018-10-23 09:41:01,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:41:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-23 09:41:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-23 09:41:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-23 09:41:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2018-10-23 09:41:01,889 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2018-10-23 09:41:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:01,889 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2018-10-23 09:41:01,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-23 09:41:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2018-10-23 09:41:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-23 09:41:01,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:01,891 INFO L375 BasicCegarLoop]: trace histogram [61, 33, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:01,891 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:01,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1671228740, now seen corresponding path program 33 times [2018-10-23 09:41:01,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:01,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:01,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:01,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:01,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-10-23 09:41:02,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:02,721 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:02,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:03,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-23 09:41:03,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:03,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 784 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-23 09:41:04,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:04,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 31] total 74 [2018-10-23 09:41:04,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-23 09:41:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-23 09:41:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:41:04,425 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 74 states. [2018-10-23 09:41:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:04,860 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2018-10-23 09:41:04,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-23 09:41:04,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 145 [2018-10-23 09:41:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:04,862 INFO L225 Difference]: With dead ends: 209 [2018-10-23 09:41:04,862 INFO L226 Difference]: Without dead ends: 151 [2018-10-23 09:41:04,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:41:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-23 09:41:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2018-10-23 09:41:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-23 09:41:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-23 09:41:04,869 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 145 [2018-10-23 09:41:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:04,869 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-23 09:41:04,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-23 09:41:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-23 09:41:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-23 09:41:04,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:04,870 INFO L375 BasicCegarLoop]: trace histogram [63, 34, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:04,871 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:04,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -668928037, now seen corresponding path program 34 times [2018-10-23 09:41:04,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:04,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:04,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:04,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:04,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1995 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-10-23 09:41:05,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:05,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:05,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:06,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:06,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:06,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1995 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-10-23 09:41:06,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:06,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-23 09:41:06,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:41:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:41:06,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:41:06,071 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 46 states. [2018-10-23 09:41:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:06,256 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-23 09:41:06,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:41:06,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 149 [2018-10-23 09:41:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:06,258 INFO L225 Difference]: With dead ends: 212 [2018-10-23 09:41:06,258 INFO L226 Difference]: Without dead ends: 152 [2018-10-23 09:41:06,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:41:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-23 09:41:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-23 09:41:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-23 09:41:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2018-10-23 09:41:06,264 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2018-10-23 09:41:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:06,265 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2018-10-23 09:41:06,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:41:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2018-10-23 09:41:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-23 09:41:06,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:06,266 INFO L375 BasicCegarLoop]: trace histogram [64, 35, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:06,266 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:06,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1768679624, now seen corresponding path program 35 times [2018-10-23 09:41:06,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:06,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:06,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:06,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:06,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-10-23 09:41:07,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:07,561 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:07,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:07,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-10-23 09:41:07,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:07,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2079 proven. 961 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-23 09:41:09,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:09,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 34] total 79 [2018-10-23 09:41:09,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-23 09:41:09,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-23 09:41:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-23 09:41:09,041 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 79 states. [2018-10-23 09:41:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:09,548 INFO L93 Difference]: Finished difference Result 221 states and 226 transitions. [2018-10-23 09:41:09,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-23 09:41:09,549 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 151 [2018-10-23 09:41:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:09,551 INFO L225 Difference]: With dead ends: 221 [2018-10-23 09:41:09,551 INFO L226 Difference]: Without dead ends: 161 [2018-10-23 09:41:09,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-23 09:41:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-23 09:41:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2018-10-23 09:41:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-23 09:41:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-23 09:41:09,557 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 151 [2018-10-23 09:41:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:09,558 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-23 09:41:09,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-23 09:41:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-23 09:41:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-23 09:41:09,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:09,559 INFO L375 BasicCegarLoop]: trace histogram [68, 36, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:09,559 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:09,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1193818365, now seen corresponding path program 36 times [2018-10-23 09:41:09,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:09,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:09,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:09,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:09,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2331 proven. 1332 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-10-23 09:41:10,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:10,858 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:10,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:11,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-23 09:41:11,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:11,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1089 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-23 09:41:13,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:13,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 36] total 82 [2018-10-23 09:41:13,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-23 09:41:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-23 09:41:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:41:13,788 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 82 states. [2018-10-23 09:41:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:14,231 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-10-23 09:41:14,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-23 09:41:14,232 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 159 [2018-10-23 09:41:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:14,234 INFO L225 Difference]: With dead ends: 233 [2018-10-23 09:41:14,234 INFO L226 Difference]: Without dead ends: 167 [2018-10-23 09:41:14,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:41:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-23 09:41:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2018-10-23 09:41:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-23 09:41:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-23 09:41:14,241 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 159 [2018-10-23 09:41:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:14,241 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-23 09:41:14,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-23 09:41:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-23 09:41:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-23 09:41:14,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:14,242 INFO L375 BasicCegarLoop]: trace histogram [71, 37, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:14,243 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:14,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:14,243 INFO L82 PathProgramCache]: Analyzing trace with hash -380853868, now seen corresponding path program 37 times [2018-10-23 09:41:14,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:14,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:14,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:14,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:14,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2546 proven. 1406 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-23 09:41:15,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:15,998 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:16,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:16,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2546 proven. 1406 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-23 09:41:16,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:16,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-23 09:41:16,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:41:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:41:16,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:41:16,107 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 49 states. [2018-10-23 09:41:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:16,313 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2018-10-23 09:41:16,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 09:41:16,314 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 165 [2018-10-23 09:41:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:16,315 INFO L225 Difference]: With dead ends: 238 [2018-10-23 09:41:16,315 INFO L226 Difference]: Without dead ends: 168 [2018-10-23 09:41:16,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:41:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-23 09:41:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-23 09:41:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-23 09:41:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-23 09:41:16,322 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-10-23 09:41:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:16,322 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-23 09:41:16,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:41:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-23 09:41:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-23 09:41:16,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:16,324 INFO L375 BasicCegarLoop]: trace histogram [72, 38, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:16,324 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:16,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1096247025, now seen corresponding path program 38 times [2018-10-23 09:41:16,324 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:16,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:16,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:16,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:16,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-23 09:41:17,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:17,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:17,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:17,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:17,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:17,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-23 09:41:17,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:17,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-23 09:41:17,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 09:41:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 09:41:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:41:17,515 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 50 states. [2018-10-23 09:41:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:18,772 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2018-10-23 09:41:18,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 09:41:18,772 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 167 [2018-10-23 09:41:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:18,773 INFO L225 Difference]: With dead ends: 240 [2018-10-23 09:41:18,774 INFO L226 Difference]: Without dead ends: 170 [2018-10-23 09:41:18,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:41:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-23 09:41:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-23 09:41:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-23 09:41:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2018-10-23 09:41:18,780 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2018-10-23 09:41:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:18,781 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2018-10-23 09:41:18,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 09:41:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2018-10-23 09:41:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-23 09:41:18,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:18,782 INFO L375 BasicCegarLoop]: trace histogram [73, 39, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:18,782 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:18,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1043969778, now seen corresponding path program 39 times [2018-10-23 09:41:18,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:18,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:18,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:18,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-10-23 09:41:21,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:21,322 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:21,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:21,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-23 09:41:21,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:21,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2691 proven. 1156 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:23,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:23,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 37] total 86 [2018-10-23 09:41:23,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-23 09:41:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-23 09:41:23,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-23 09:41:23,148 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 86 states. [2018-10-23 09:41:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:23,660 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-10-23 09:41:23,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-23 09:41:23,660 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 169 [2018-10-23 09:41:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:23,662 INFO L225 Difference]: With dead ends: 245 [2018-10-23 09:41:23,662 INFO L226 Difference]: Without dead ends: 175 [2018-10-23 09:41:23,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-23 09:41:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-23 09:41:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2018-10-23 09:41:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-23 09:41:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-23 09:41:23,667 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 169 [2018-10-23 09:41:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:23,668 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-23 09:41:23,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-23 09:41:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-23 09:41:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-23 09:41:23,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:23,669 INFO L375 BasicCegarLoop]: trace histogram [75, 40, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:23,669 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:23,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1957413413, now seen corresponding path program 40 times [2018-10-23 09:41:23,669 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:23,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:23,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2829 proven. 1640 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-23 09:41:24,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:24,938 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:24,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:25,004 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:25,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:25,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2829 proven. 1640 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-10-23 09:41:25,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:25,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-23 09:41:25,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:41:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:41:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:25,052 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 52 states. [2018-10-23 09:41:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:25,397 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-23 09:41:25,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:41:25,397 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 173 [2018-10-23 09:41:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:25,398 INFO L225 Difference]: With dead ends: 248 [2018-10-23 09:41:25,398 INFO L226 Difference]: Without dead ends: 176 [2018-10-23 09:41:25,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-23 09:41:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-23 09:41:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-23 09:41:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-23 09:41:25,404 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2018-10-23 09:41:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:25,405 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-23 09:41:25,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:41:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-23 09:41:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-23 09:41:25,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:25,406 INFO L375 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:25,406 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:25,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1459758462, now seen corresponding path program 41 times [2018-10-23 09:41:25,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:25,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:25,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:25,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:25,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2925 proven. 1369 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:26,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:26,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:26,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:26,228 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2018-10-23 09:41:26,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:26,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2925 proven. 1369 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:26,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:26,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-23 09:41:26,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:41:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:41:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:41:26,281 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 40 states. [2018-10-23 09:41:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:26,437 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2018-10-23 09:41:26,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:41:26,437 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 175 [2018-10-23 09:41:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:26,439 INFO L225 Difference]: With dead ends: 186 [2018-10-23 09:41:26,439 INFO L226 Difference]: Without dead ends: 183 [2018-10-23 09:41:26,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:41:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-23 09:41:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-23 09:41:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-23 09:41:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-10-23 09:41:26,446 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 175 [2018-10-23 09:41:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:26,446 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-10-23 09:41:26,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:41:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-10-23 09:41:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-23 09:41:26,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:26,447 INFO L375 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:26,447 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:26,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 42 times [2018-10-23 09:41:26,448 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:26,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:26,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:26,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:26,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3159 proven. 1600 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:27,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:27,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:27,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:27,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-23 09:41:27,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:27,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-23 09:41:27,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:27,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2018-10-23 09:41:27,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:41:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:41:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:27,413 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 43 states. [2018-10-23 09:41:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:27,622 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2018-10-23 09:41:27,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:41:27,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 181 [2018-10-23 09:41:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:27,624 INFO L225 Difference]: With dead ends: 192 [2018-10-23 09:41:27,624 INFO L226 Difference]: Without dead ends: 189 [2018-10-23 09:41:27,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-23 09:41:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-23 09:41:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-23 09:41:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2018-10-23 09:41:27,630 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 181 [2018-10-23 09:41:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:27,630 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2018-10-23 09:41:27,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:41:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2018-10-23 09:41:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-23 09:41:27,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:27,631 INFO L375 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:27,631 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:27,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 43 times [2018-10-23 09:41:27,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:27,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:27,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:27,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3393 proven. 1849 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:28,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:28,546 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:28,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:28,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:30,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:30,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 94] total 96 [2018-10-23 09:41:30,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-23 09:41:30,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-23 09:41:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-23 09:41:30,606 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 96 states. [2018-10-23 09:41:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:31,079 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2018-10-23 09:41:31,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-23 09:41:31,080 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 187 [2018-10-23 09:41:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:31,081 INFO L225 Difference]: With dead ends: 198 [2018-10-23 09:41:31,081 INFO L226 Difference]: Without dead ends: 195 [2018-10-23 09:41:31,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-23 09:41:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-23 09:41:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-23 09:41:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-23 09:41:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2018-10-23 09:41:31,086 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 187 [2018-10-23 09:41:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:31,087 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2018-10-23 09:41:31,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-23 09:41:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2018-10-23 09:41:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-23 09:41:31,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:31,088 INFO L375 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:31,088 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:31,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 44 times [2018-10-23 09:41:31,089 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:31,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:31,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:31,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:31,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3627 proven. 2116 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:32,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:32,319 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:32,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:32,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:32,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:32,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:33,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:33,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 97] total 99 [2018-10-23 09:41:33,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-23 09:41:33,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-23 09:41:33,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-23 09:41:33,634 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 99 states. [2018-10-23 09:41:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:34,122 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2018-10-23 09:41:34,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-23 09:41:34,122 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 193 [2018-10-23 09:41:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:34,124 INFO L225 Difference]: With dead ends: 204 [2018-10-23 09:41:34,124 INFO L226 Difference]: Without dead ends: 201 [2018-10-23 09:41:34,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4600 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-23 09:41:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-23 09:41:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-23 09:41:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-23 09:41:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2018-10-23 09:41:34,129 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 193 [2018-10-23 09:41:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:34,130 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2018-10-23 09:41:34,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-23 09:41:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2018-10-23 09:41:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-23 09:41:34,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:34,131 INFO L375 BasicCegarLoop]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:34,131 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:34,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 45 times [2018-10-23 09:41:34,131 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:34,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:34,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3861 proven. 2401 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-23 09:41:35,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:35,206 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:35,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:35,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-10-23 09:41:35,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:35,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:36,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:36,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 100] total 102 [2018-10-23 09:41:36,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-23 09:41:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-23 09:41:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-23 09:41:36,667 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 102 states. [2018-10-23 09:41:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:37,222 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2018-10-23 09:41:37,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-23 09:41:37,222 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 199 [2018-10-23 09:41:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:37,224 INFO L225 Difference]: With dead ends: 209 [2018-10-23 09:41:37,224 INFO L226 Difference]: Without dead ends: 206 [2018-10-23 09:41:37,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-23 09:41:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-23 09:41:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-23 09:41:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-23 09:41:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2018-10-23 09:41:37,231 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 199 [2018-10-23 09:41:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:37,231 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2018-10-23 09:41:37,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-23 09:41:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2018-10-23 09:41:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-23 09:41:37,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:37,232 INFO L375 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:37,233 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:37,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 46 times [2018-10-23 09:41:37,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:37,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:37,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:37,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-23 09:41:39,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:39,120 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:39,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:39,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:39,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:39,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-23 09:41:39,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:39,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-23 09:41:39,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-23 09:41:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-23 09:41:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:41:39,432 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 54 states. [2018-10-23 09:41:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:42,089 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2018-10-23 09:41:42,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-23 09:41:42,090 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 205 [2018-10-23 09:41:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:42,092 INFO L225 Difference]: With dead ends: 212 [2018-10-23 09:41:42,092 INFO L226 Difference]: Without dead ends: 209 [2018-10-23 09:41:42,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:41:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-23 09:41:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2018-10-23 09:41:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-23 09:41:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-10-23 09:41:42,103 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2018-10-23 09:41:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:42,103 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-10-23 09:41:42,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-23 09:41:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-10-23 09:41:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-23 09:41:42,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:42,105 INFO L375 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:42,105 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:42,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 47 times [2018-10-23 09:41:42,106 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:42,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:42,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:42,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:42,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-23 09:41:44,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:41:44,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-10-23 09:41:44,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:41:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:41:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:44,159 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 52 states. [2018-10-23 09:41:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:44,389 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2018-10-23 09:41:44,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:41:44,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2018-10-23 09:41:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:44,390 INFO L225 Difference]: With dead ends: 208 [2018-10-23 09:41:44,390 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 09:41:44,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 09:41:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 09:41:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 09:41:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 09:41:44,392 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2018-10-23 09:41:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:44,392 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 09:41:44,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:41:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 09:41:44,393 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 09:41:44,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 09:41:44,705 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-10-23 09:41:44,891 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-10-23 09:41:46,842 WARN L179 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2018-10-23 09:41:46,917 INFO L421 ceAbstractionStarter]: At program point L118(lines 56 119) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 8) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,917 INFO L425 ceAbstractionStarter]: For program point L44(lines 44 143) no Hoare annotation was computed. [2018-10-23 09:41:46,917 INFO L425 ceAbstractionStarter]: For program point L69(lines 69 80) no Hoare annotation was computed. [2018-10-23 09:41:46,917 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 191) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 208) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L421 ceAbstractionStarter]: At program point L202(lines 14 203) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,918 INFO L425 ceAbstractionStarter]: For program point L62(lines 62 107) no Hoare annotation was computed. [2018-10-23 09:41:46,918 INFO L421 ceAbstractionStarter]: At program point L178(lines 26 179) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 3) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,919 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 155) no Hoare annotation was computed. [2018-10-23 09:41:46,919 INFO L421 ceAbstractionStarter]: At program point L154(lines 38 155) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 5) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,919 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 203) no Hoare annotation was computed. [2018-10-23 09:41:46,919 INFO L421 ceAbstractionStarter]: At program point L130(lines 50 131) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 7) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,919 INFO L425 ceAbstractionStarter]: For program point L89(lines 89 98) no Hoare annotation was computed. [2018-10-23 09:41:46,919 INFO L425 ceAbstractionStarter]: For program point L56(lines 56 119) no Hoare annotation was computed. [2018-10-23 09:41:46,920 INFO L421 ceAbstractionStarter]: At program point L106(lines 62 107) the Hoare annotation is: (or (and (<= 92 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 92)) (and (<= 56 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 56) (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 58) (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 58) (<= 58 ULTIMATE.start_main_~main__y~0)) (and (<= 74 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 74) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 74)) (and (<= 51 ULTIMATE.start_main_~main__x~0) (<= 51 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 51) (<= ULTIMATE.start_main_~main__y~0 51)) (and (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 75) (<= 75 ULTIMATE.start_main_~main__x~0)) (and (<= 88 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 88) (<= ULTIMATE.start_main_~main__y~0 88) (<= 88 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 69) (<= 69 ULTIMATE.start_main_~main__x~0) (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 69)) (and (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 90) (<= 90 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 90)) (and (<= 68 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 68) (<= 68 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 68)) (and (<= ULTIMATE.start_main_~main__y~0 97) (<= 97 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 97) (<= 97 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 85) (<= ULTIMATE.start_main_~main__x~0 85) (<= 85 ULTIMATE.start_main_~main__y~0) (<= 85 ULTIMATE.start_main_~main__x~0)) (and (<= 91 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 91) (<= ULTIMATE.start_main_~main__y~0 91) (<= 91 ULTIMATE.start_main_~main__y~0)) (and (<= 71 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 71) (<= ULTIMATE.start_main_~main__x~0 71) (<= 71 ULTIMATE.start_main_~main__y~0)) (and (<= 83 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 83) (<= 83 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 83)) (and (<= ULTIMATE.start_main_~main__y~0 93) (<= 93 ULTIMATE.start_main_~main__x~0) (<= 93 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 93)) (and (<= 89 ULTIMATE.start_main_~main__x~0) (<= 89 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 89) (<= ULTIMATE.start_main_~main__x~0 89)) (and (<= ULTIMATE.start_main_~main__y~0 84) (<= 84 ULTIMATE.start_main_~main__y~0) (<= 84 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 84)) (and (<= 80 ULTIMATE.start_main_~main__y~0) (<= 80 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 80) (<= ULTIMATE.start_main_~main__y~0 80)) (and (<= 100 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 100) (<= 100 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 70) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__y~0) (<= 70 ULTIMATE.start_main_~main__x~0)) (and (<= 79 ULTIMATE.start_main_~main__x~0) (<= 79 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= ULTIMATE.start_main_~main__y~0 79)) (and (<= ULTIMATE.start_main_~main__y~0 65) (<= 65 ULTIMATE.start_main_~main__x~0) (<= 65 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 65)) (and (<= 82 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 82) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 82)) (and (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 94)) (and (<= ULTIMATE.start_main_~main__x~0 67) (<= 67 ULTIMATE.start_main_~main__y~0) (<= 67 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 67)) (and (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 72) (<= ULTIMATE.start_main_~main__y~0 72)) (and (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78) (<= 78 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 78)) (and (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 86) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 96) (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 96) (<= 96 ULTIMATE.start_main_~main__x~0)) (and (<= 60 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 60) (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 60)) (and (<= 52 ULTIMATE.start_main_~main__y~0) (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 52) (<= ULTIMATE.start_main_~main__x~0 52)) (and (<= 99 ULTIMATE.start_main_~main__x~0) (<= 99 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 99) (<= ULTIMATE.start_main_~main__y~0 99)) (and (<= ULTIMATE.start_main_~main__x~0 63) (<= ULTIMATE.start_main_~main__y~0 63) (<= 63 ULTIMATE.start_main_~main__x~0) (<= 63 ULTIMATE.start_main_~main__y~0)) (and (<= 53 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 53) (<= ULTIMATE.start_main_~main__x~0 53) (<= 53 ULTIMATE.start_main_~main__x~0)) (and (<= 62 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 62) (<= 62 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 62)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 64) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64)) (and (<= 81 ULTIMATE.start_main_~main__x~0) (<= 81 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 81) (<= ULTIMATE.start_main_~main__x~0 81)) (and (<= ULTIMATE.start_main_~main__x~0 55) (<= 55 ULTIMATE.start_main_~main__x~0) (<= 55 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 55)) (and (<= ULTIMATE.start_main_~main__y~0 66) (<= 66 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 66) (<= 66 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 50) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) (and (<= 59 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 59) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0)) (and (<= 54 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 54) (<= 54 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 54)) (and (<= ULTIMATE.start_main_~main__y~0 98) (<= 98 ULTIMATE.start_main_~main__x~0) (<= 98 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 98)) (and (<= ULTIMATE.start_main_~main__y~0 73) (<= 73 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= 73 ULTIMATE.start_main_~main__y~0)) (and (<= 77 ULTIMATE.start_main_~main__y~0) (<= 77 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 77) (<= ULTIMATE.start_main_~main__y~0 77)) (and (<= 57 ULTIMATE.start_main_~main__x~0) (<= 57 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 57) (<= ULTIMATE.start_main_~main__y~0 57)) (and (<= ULTIMATE.start_main_~main__x~0 61) (<= 61 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 61) (<= 61 ULTIMATE.start_main_~main__y~0)) (and (<= 76 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 76) (<= 76 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 76)) (and (<= 87 ULTIMATE.start_main_~main__y~0) (<= 87 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 87) (<= ULTIMATE.start_main_~main__y~0 87))) [2018-10-23 09:41:46,921 INFO L425 ceAbstractionStarter]: For program point L32(lines 32 167) no Hoare annotation was computed. [2018-10-23 09:41:46,921 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-23 09:41:46,921 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-23 09:41:46,921 INFO L421 ceAbstractionStarter]: At program point L190(lines 20 191) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,921 INFO L425 ceAbstractionStarter]: For program point L91(line 91) no Hoare annotation was computed. [2018-10-23 09:41:46,921 INFO L425 ceAbstractionStarter]: For program point L50(lines 50 131) no Hoare annotation was computed. [2018-10-23 09:41:46,922 INFO L428 ceAbstractionStarter]: At program point L207(lines 8 209) the Hoare annotation is: true [2018-10-23 09:41:46,922 INFO L421 ceAbstractionStarter]: At program point L166(lines 32 167) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 4) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,922 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 179) no Hoare annotation was computed. [2018-10-23 09:41:46,922 INFO L421 ceAbstractionStarter]: At program point L142(lines 44 143) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 6) (<= ULTIMATE.start_main_~main__y~0 50)) [2018-10-23 09:41:46,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:41:46 BoogieIcfgContainer [2018-10-23 09:41:46,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:41:46,958 INFO L168 Benchmark]: Toolchain (without parser) took 92720.50 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -407.3 MB). Peak memory consumption was 870.4 MB. Max. memory is 7.1 GB. [2018-10-23 09:41:46,959 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:41:46,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 09:41:46,960 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:41:46,961 INFO L168 Benchmark]: Boogie Preprocessor took 24.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:41:46,961 INFO L168 Benchmark]: RCFGBuilder took 615.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-23 09:41:46,962 INFO L168 Benchmark]: TraceAbstraction took 91642.16 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 521.1 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 386.1 MB). Peak memory consumption was 907.2 MB. Max. memory is 7.1 GB. [2018-10-23 09:41:46,965 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 391.44 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 40.90 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 24.31 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 615.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 91642.16 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 521.1 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 386.1 MB). Peak memory consumption was 907.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (main__x <= 1 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (main__x <= 5 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 62]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((92 <= main__y && main__y <= 92) && 92 <= main__x) && main__x <= 92) || (((56 <= main__y && main__x <= 56) && 56 <= main__x) && main__y <= 56)) || (((main__y <= 58 && 58 <= main__x) && main__x <= 58) && 58 <= main__y)) || (((74 <= main__y && main__y <= 74) && 74 <= main__x) && main__x <= 74)) || (((51 <= main__x && 51 <= main__y) && main__x <= 51) && main__y <= 51)) || (((main__y <= 75 && 75 <= main__y) && main__x <= 75) && 75 <= main__x)) || (((88 <= main__x && main__x <= 88) && main__y <= 88) && 88 <= main__y)) || (((main__y <= 69 && 69 <= main__x) && 69 <= main__y) && main__x <= 69)) || (((main__x <= 95 && 95 <= main__x) && main__y <= 95) && 95 <= main__y)) || (((90 <= main__y && main__x <= 90) && 90 <= main__x) && main__y <= 90)) || (((68 <= main__y && main__x <= 68) && 68 <= main__x) && main__y <= 68)) || (((main__y <= 97 && 97 <= main__x) && main__x <= 97) && 97 <= main__y)) || (((main__y <= 85 && main__x <= 85) && 85 <= main__y) && 85 <= main__x)) || (((91 <= main__x && main__x <= 91) && main__y <= 91) && 91 <= main__y)) || (((71 <= main__x && main__y <= 71) && main__x <= 71) && 71 <= main__y)) || (((83 <= main__x && main__y <= 83) && 83 <= main__y) && main__x <= 83)) || (((main__y <= 93 && 93 <= main__x) && 93 <= main__y) && main__x <= 93)) || (((89 <= main__x && 89 <= main__y) && main__y <= 89) && main__x <= 89)) || (((main__y <= 84 && 84 <= main__y) && 84 <= main__x) && main__x <= 84)) || (((80 <= main__y && 80 <= main__x) && main__x <= 80) && main__y <= 80)) || ((100 <= main__x && main__y <= 100) && 100 <= main__y)) || (((main__x <= 70 && main__y <= 70) && 70 <= main__y) && 70 <= main__x)) || (((79 <= main__x && 79 <= main__y) && main__x <= 79) && main__y <= 79)) || (((main__y <= 65 && 65 <= main__x) && 65 <= main__y) && main__x <= 65)) || (((82 <= main__y && main__y <= 82) && 82 <= main__x) && main__x <= 82)) || (((94 <= main__x && main__x <= 94) && 94 <= main__y) && main__y <= 94)) || (((main__x <= 67 && 67 <= main__y) && 67 <= main__x) && main__y <= 67)) || (((72 <= main__y && 72 <= main__x) && main__x <= 72) && main__y <= 72)) || (((78 <= main__x && main__x <= 78) && 78 <= main__y) && main__y <= 78)) || (((main__y <= 86 && 86 <= main__x) && main__x <= 86) && 86 <= main__y)) || (((main__x <= 96 && 96 <= main__y) && main__y <= 96) && 96 <= main__x)) || (((60 <= main__y && main__x <= 60) && 60 <= main__x) && main__y <= 60)) || (((52 <= main__y && 52 <= main__x) && main__y <= 52) && main__x <= 52)) || (((99 <= main__x && 99 <= main__y) && main__x <= 99) && main__y <= 99)) || (((main__x <= 63 && main__y <= 63) && 63 <= main__x) && 63 <= main__y)) || (((53 <= main__y && main__y <= 53) && main__x <= 53) && 53 <= main__x)) || (((62 <= main__x && main__x <= 62) && 62 <= main__y) && main__y <= 62)) || (((64 <= main__x && main__x <= 64) && 64 <= main__y) && main__y <= 64)) || (((81 <= main__x && 81 <= main__y) && main__y <= 81) && main__x <= 81)) || (((main__x <= 55 && 55 <= main__x) && 55 <= main__y) && main__y <= 55)) || (((main__y <= 66 && 66 <= main__y) && main__x <= 66) && 66 <= main__x)) || ((main__x <= 50 && 50 <= main__y) && main__y <= 50)) || (((59 <= main__y && main__y <= 59) && main__x <= 59) && 59 <= main__x)) || (((54 <= main__y && main__y <= 54) && 54 <= main__x) && main__x <= 54)) || (((main__y <= 98 && 98 <= main__x) && 98 <= main__y) && main__x <= 98)) || (((main__y <= 73 && 73 <= main__x) && main__x <= 73) && 73 <= main__y)) || (((77 <= main__y && 77 <= main__x) && main__x <= 77) && main__y <= 77)) || (((57 <= main__x && 57 <= main__y) && main__x <= 57) && main__y <= 57)) || (((main__x <= 61 && 61 <= main__x) && main__y <= 61) && 61 <= main__y)) || (((76 <= main__x && main__x <= 76) && 76 <= main__y) && main__y <= 76)) || (((87 <= main__y && 87 <= main__x) && main__x <= 87) && main__y <= 87) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (main__x <= 4 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: (main__x <= 8 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 3) && main__y <= 50 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (main__x <= 7 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (main__x <= 2 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 6) && main__y <= 50 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. SAFE Result, 91.5s OverallTime, 55 OverallIterations, 92 TraceHistogramMax, 20.6s AutomataDifference, 0.0s DeadEndRemovalTime, 2.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 495 SDtfs, 1914 SDslu, 6115 SDs, 0 SdLazy, 13222 SolverSat, 2041 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6661 GetRequests, 4598 SyntacticMatches, 2 SemanticMatches, 2061 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13800 ImplicationChecksByTransitivity, 59.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 55 MinimizatonAttempts, 23 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 171 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 61.9s InterpolantComputationTime, 10433 NumberOfCodeBlocks, 10371 NumberOfCodeBlocksAsserted, 1031 NumberOfCheckSat, 10332 ConstructedInterpolants, 0 QuantifiedInterpolants, 3352268 SizeOfPredicates, 26 NumberOfNonLiveVariables, 12110 ConjunctsInSsa, 1527 ConjunctsInUnsatCore, 101 InterpolantComputations, 9 PerfectInterpolantSequences, 152159/241943 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...