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-crafted/simple_array_index_value_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:54:51,570 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:54:51,572 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:54:51,584 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:54:51,584 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:54:51,585 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:54:51,586 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:54:51,588 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:54:51,590 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:54:51,591 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:54:51,591 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:54:51,592 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:54:51,593 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:54:51,594 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:54:51,598 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:54:51,598 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:54:51,599 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:54:51,601 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:54:51,608 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:54:51,610 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:54:51,615 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:54:51,616 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:54:51,621 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:54:51,633 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 [2018-10-24 11:54:51,660 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:54:51,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:54:51,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:54:51,663 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:54:51,664 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:54:51,667 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:54:51,668 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:54:51,668 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:54:51,668 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:54:51,668 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:54:51,668 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:54:51,669 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:54:51,669 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:54:51,669 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:54:51,669 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:54:51,669 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:54:51,670 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:54:51,670 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:54:51,670 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:54:51,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:54:51,670 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:54:51,670 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:54:51,671 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:54:51,671 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:54:51,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:54:51,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:54:51,671 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:54:51,672 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:54:51,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:54:51,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:54:51,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:54:51,745 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:54:51,746 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:54:51,746 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-24 11:54:51,808 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/911f273b0/0fd019455e0d4f37a5d1a336bf5790ef/FLAG2d17c1ea0 [2018-10-24 11:54:52,209 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:54:52,210 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-24 11:54:52,217 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/911f273b0/0fd019455e0d4f37a5d1a336bf5790ef/FLAG2d17c1ea0 [2018-10-24 11:54:52,231 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/911f273b0/0fd019455e0d4f37a5d1a336bf5790ef [2018-10-24 11:54:52,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:54:52,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:54:52,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:54:52,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:54:52,247 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:54:52,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccbb6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52, skipping insertion in model container [2018-10-24 11:54:52,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:54:52,282 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:54:52,456 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:54:52,461 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:54:52,481 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:54:52,501 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:54:52,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52 WrapperNode [2018-10-24 11:54:52,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:54:52,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:54:52,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:54:52,503 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:54:52,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:54:52,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:54:52,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:54:52,548 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:54:52,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (1/1) ... [2018-10-24 11:54:52,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:54:52,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:54:52,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:54:52,588 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:54:52,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (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 [2018-10-24 11:54:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:54:52,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:54:53,117 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:54:53,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:54:53 BoogieIcfgContainer [2018-10-24 11:54:53,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:54:53,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:54:53,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:54:53,122 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:54:53,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:54:52" (1/3) ... [2018-10-24 11:54:53,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6860abe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:54:53, skipping insertion in model container [2018-10-24 11:54:53,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:54:52" (2/3) ... [2018-10-24 11:54:53,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6860abe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:54:53, skipping insertion in model container [2018-10-24 11:54:53,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:54:53" (3/3) ... [2018-10-24 11:54:53,126 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-24 11:54:53,136 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:54:53,143 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:54:53,160 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:54:53,192 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:54:53,193 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:54:53,193 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:54:53,194 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:54:53,194 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:54:53,194 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:54:53,194 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:54:53,194 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:54:53,195 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:54:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-10-24 11:54:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:54:53,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:53,217 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:53,220 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:53,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:53,225 INFO L82 PathProgramCache]: Analyzing trace with hash 413341548, now seen corresponding path program 1 times [2018-10-24 11:54:53,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:53,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:53,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:53,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:53,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:54:53,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:54:53,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:54:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:54:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:54:53,374 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2018-10-24 11:54:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:53,390 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-24 11:54:53,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:54:53,391 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-24 11:54:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:53,402 INFO L225 Difference]: With dead ends: 29 [2018-10-24 11:54:53,402 INFO L226 Difference]: Without dead ends: 13 [2018-10-24 11:54:53,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:54:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-24 11:54:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-24 11:54:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-24 11:54:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-24 11:54:53,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-10-24 11:54:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:53,440 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-24 11:54:53,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:54:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-24 11:54:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:54:53,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:53,441 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:53,441 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:53,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 298208402, now seen corresponding path program 1 times [2018-10-24 11:54:53,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:53,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:53,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:53,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:53,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:54:53,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:54:53,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:54:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:54:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:54:53,521 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-24 11:54:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:53,632 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-24 11:54:53,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:54:53,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-24 11:54:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:53,633 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:54:53,633 INFO L226 Difference]: Without dead ends: 23 [2018-10-24 11:54:53,634 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 [2018-10-24 11:54:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-24 11:54:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2018-10-24 11:54:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-24 11:54:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-24 11:54:53,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 9 [2018-10-24 11:54:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:53,639 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-24 11:54:53,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:54:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-24 11:54:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 11:54:53,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:53,639 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:53,640 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:53,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash -987782960, now seen corresponding path program 1 times [2018-10-24 11:54:53,640 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:53,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:53,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:53,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:53,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:53,771 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 [2018-10-24 11:54:53,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:53,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:53,909 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-24 11:54:53,924 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-24 11:54:53,924 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:54:53,928 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:54:53,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:54:53,942 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2018-10-24 11:54:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:54,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:54,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2018-10-24 11:54:54,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:54:54,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:54:54,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:54:54,140 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-24 11:54:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:54,517 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-24 11:54:54,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:54:54,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-24 11:54:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:54,519 INFO L225 Difference]: With dead ends: 39 [2018-10-24 11:54:54,520 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:54:54,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:54:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:54:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2018-10-24 11:54:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:54:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-24 11:54:54,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2018-10-24 11:54:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:54,527 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-24 11:54:54,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:54:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-24 11:54:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:54:54,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:54,529 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:54,529 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:54,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1126672101, now seen corresponding path program 1 times [2018-10-24 11:54:54,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:54,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:54,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:54,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:54,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:54:54,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:54,701 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 11:54:54,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:54,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:54,861 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:54:54,864 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:54:54,865 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:54:54,869 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:54:54,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:54:54,876 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:54:55,117 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-24 11:54:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:55,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:55,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2018-10-24 11:54:55,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:54:55,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:54:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:54:55,305 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-24 11:54:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:59,777 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-24 11:54:59,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:54:59,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-24 11:54:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:59,779 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:54:59,779 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:54:59,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:54:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:54:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-24 11:54:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 11:54:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-24 11:54:59,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-10-24 11:54:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:59,787 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-24 11:54:59,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:54:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-24 11:54:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 11:54:59,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:59,789 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:59,789 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:59,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash -819424739, now seen corresponding path program 2 times [2018-10-24 11:54:59,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:59,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:59,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:55:00,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:00,102 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 11:55:00,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:55:00,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:55:00,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:00,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:00,226 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:55:00,233 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:55:00,234 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:00,242 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:00,249 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:00,249 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:55:00,282 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:55:00,315 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:55:00,317 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:55:00,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:00,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:55:00,344 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:55:04,041 WARN L179 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 23 [2018-10-24 11:55:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:06,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:06,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-10-24 11:55:06,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:55:06,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:55:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=119, Unknown=2, NotChecked=0, Total=156 [2018-10-24 11:55:06,437 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2018-10-24 11:55:09,028 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-10-24 11:55:11,188 WARN L179 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 30 [2018-10-24 11:55:21,856 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-10-24 11:55:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:30,499 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-24 11:55:30,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:55:30,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2018-10-24 11:55:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:30,502 INFO L225 Difference]: With dead ends: 60 [2018-10-24 11:55:30,502 INFO L226 Difference]: Without dead ends: 49 [2018-10-24 11:55:30,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=89, Invalid=325, Unknown=6, NotChecked=0, Total=420 [2018-10-24 11:55:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-24 11:55:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-24 11:55:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:55:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-24 11:55:30,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2018-10-24 11:55:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:30,516 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-24 11:55:30,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:55:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-24 11:55:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 11:55:30,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:30,518 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:30,518 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:30,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash -77918030, now seen corresponding path program 3 times [2018-10-24 11:55:30,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:30,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:30,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:30,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:30,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-24 11:55:30,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:30,861 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 [2018-10-24 11:55:30,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:55:31,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 11:55:31,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:31,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:31,105 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:55:31,107 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:55:31,107 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:31,109 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:31,115 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:31,115 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:55:31,161 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:55:31,181 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:55:31,183 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:55:31,198 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:31,211 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:55:31,211 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:55:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:55:32,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:32,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 15 [2018-10-24 11:55:32,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:55:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:55:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:55:32,245 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2018-10-24 11:55:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:32,881 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-10-24 11:55:32,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:55:32,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-10-24 11:55:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:32,883 INFO L225 Difference]: With dead ends: 73 [2018-10-24 11:55:32,883 INFO L226 Difference]: Without dead ends: 57 [2018-10-24 11:55:32,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:55:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-24 11:55:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2018-10-24 11:55:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 11:55:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-24 11:55:32,894 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2018-10-24 11:55:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:32,894 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-24 11:55:32,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:55:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-24 11:55:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 11:55:32,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:32,896 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:32,896 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:32,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:32,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1573602621, now seen corresponding path program 4 times [2018-10-24 11:55:32,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:32,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:32,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:32,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-24 11:55:34,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:34,049 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 [2018-10-24 11:55:34,056 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:55:34,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:55:34,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:34,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:34,166 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:55:34,169 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:55:34,170 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:34,174 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:34,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:34,181 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:55:34,208 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:55:34,225 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:55:34,227 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:55:34,241 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:34,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:55:34,254 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:55:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:55:35,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:35,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 18 [2018-10-24 11:55:35,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:55:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:55:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:55:35,566 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2018-10-24 11:55:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:43,335 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-10-24 11:55:43,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:55:43,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2018-10-24 11:55:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:43,344 INFO L225 Difference]: With dead ends: 86 [2018-10-24 11:55:43,344 INFO L226 Difference]: Without dead ends: 65 [2018-10-24 11:55:43,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:55:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-24 11:55:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2018-10-24 11:55:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 11:55:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-24 11:55:43,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2018-10-24 11:55:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:43,365 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-24 11:55:43,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:55:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-24 11:55:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 11:55:43,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:43,368 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:43,368 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:43,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1336865390, now seen corresponding path program 5 times [2018-10-24 11:55:43,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:43,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:43,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:43,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:43,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-24 11:55:44,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:44,981 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 [2018-10-24 11:55:44,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:01,438 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:56:01,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:01,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:01,523 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:56:01,526 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:56:01,527 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:56:01,528 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:01,534 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:01,535 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:56:01,594 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:56:01,617 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:56:01,620 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:56:01,631 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:01,642 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:56:01,643 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:56:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 11:56:02,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:02,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2018-10-24 11:56:02,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:56:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:56:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:56:02,338 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 21 states. [2018-10-24 11:56:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:16,942 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-10-24 11:56:16,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:56:16,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2018-10-24 11:56:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:16,944 INFO L225 Difference]: With dead ends: 99 [2018-10-24 11:56:16,944 INFO L226 Difference]: Without dead ends: 73 [2018-10-24 11:56:16,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2018-10-24 11:56:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-24 11:56:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2018-10-24 11:56:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 11:56:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-24 11:56:16,966 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 47 [2018-10-24 11:56:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:16,966 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-24 11:56:16,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:56:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-24 11:56:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-24 11:56:16,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:16,968 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:16,968 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:16,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -298184611, now seen corresponding path program 6 times [2018-10-24 11:56:16,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:16,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:16,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:16,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:16,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-24 11:56:18,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:18,906 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 [2018-10-24 11:56:18,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:19,705 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:56:19,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:19,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:19,799 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:56:19,805 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:56:19,805 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:56:19,807 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:19,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:19,812 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:56:19,872 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:56:19,907 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:56:19,910 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:56:19,921 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:19,932 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:56:19,932 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:56:23,844 WARN L179 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2018-10-24 11:56:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:24,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:24,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 25 [2018-10-24 11:56:24,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:56:24,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:56:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2018-10-24 11:56:24,345 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 25 states. [2018-10-24 11:56:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:36,241 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2018-10-24 11:56:36,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:56:36,242 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2018-10-24 11:56:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:36,243 INFO L225 Difference]: With dead ends: 112 [2018-10-24 11:56:36,243 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 11:56:36,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=115, Invalid=754, Unknown=1, NotChecked=0, Total=870 [2018-10-24 11:56:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 11:56:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2018-10-24 11:56:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-24 11:56:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-24 11:56:36,259 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 55 [2018-10-24 11:56:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:36,260 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-24 11:56:36,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:56:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-24 11:56:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-24 11:56:36,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:36,261 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:36,261 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:36,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash 743567986, now seen corresponding path program 7 times [2018-10-24 11:56:36,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:36,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:36,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:36,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:36,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-24 11:56:43,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:43,883 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 [2018-10-24 11:56:43,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:43,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:44,189 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:56:44,191 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:56:44,191 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:56:44,193 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:44,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:44,199 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:56:44,222 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:56:44,238 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:56:44,242 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:56:44,251 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:56:44,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:56:44,262 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:56:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 3 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:47,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:47,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 28 [2018-10-24 11:56:47,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:56:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:56:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=662, Unknown=3, NotChecked=0, Total=756 [2018-10-24 11:56:47,389 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 28 states. [2018-10-24 11:56:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:59,639 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-10-24 11:56:59,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:56:59,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-10-24 11:56:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:59,641 INFO L225 Difference]: With dead ends: 125 [2018-10-24 11:56:59,641 INFO L226 Difference]: Without dead ends: 89 [2018-10-24 11:56:59,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=132, Invalid=987, Unknown=3, NotChecked=0, Total=1122 [2018-10-24 11:56:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-24 11:56:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2018-10-24 11:56:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-24 11:56:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-24 11:56:59,655 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 63 [2018-10-24 11:56:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:59,655 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-24 11:56:59,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:56:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-24 11:56:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-24 11:56:59,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:59,657 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:59,657 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:59,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2134307709, now seen corresponding path program 8 times [2018-10-24 11:56:59,657 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:59,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:59,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-24 11:57:08,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:08,220 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 [2018-10-24 11:57:08,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:08,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:08,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:08,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:08,410 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-10-24 11:57:08,412 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-10-24 11:57:08,412 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:57:08,413 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:57:08,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:57:08,419 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2018-10-24 11:57:08,444 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-10-24 11:57:08,458 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2018-10-24 11:57:08,460 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:57:08,471 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:57:08,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 11:57:08,481 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:32 [2018-10-24 11:57:12,567 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2018-10-24 11:57:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 3 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:26,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:26,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 31 [2018-10-24 11:57:26,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:57:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:57:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=825, Unknown=9, NotChecked=0, Total=930 [2018-10-24 11:57:26,045 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 31 states. [2018-10-24 11:57:27,750 WARN L179 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2018-10-24 11:57:50,839 WARN L179 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 26 [2018-10-24 11:57:54,166 WARN L179 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 26 [2018-10-24 11:58:04,582 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2018-10-24 11:58:08,669 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2018-10-24 11:58:11,205 WARN L179 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2018-10-24 11:58:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:14,210 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2018-10-24 11:58:14,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:58:14,211 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2018-10-24 11:58:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:14,212 INFO L225 Difference]: With dead ends: 138 [2018-10-24 11:58:14,212 INFO L226 Difference]: Without dead ends: 97 [2018-10-24 11:58:14,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=185, Invalid=1689, Unknown=18, NotChecked=0, Total=1892 [2018-10-24 11:58:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-24 11:58:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2018-10-24 11:58:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-24 11:58:14,233 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 71 [2018-10-24 11:58:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:14,235 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-24 11:58:14,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:58:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-24 11:58:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 11:58:14,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:14,236 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:14,236 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:14,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1239138130, now seen corresponding path program 9 times [2018-10-24 11:58:14,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:14,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:14,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:14,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-10-24 11:58:23,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:23,777 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 [2018-10-24 11:58:23,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... [2018-10-24 11:59:38,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:59:38,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Cannot interrupt operation gracefully because timeout expired. Forcing shutdown