java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:44:52,891 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:44:52,893 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:44:52,905 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:44:52,905 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:44:52,906 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:44:52,908 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:44:52,910 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:44:52,911 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:44:52,912 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:44:52,913 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-11-06 22:44:52,936 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:44:52,952 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:44:52,952 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:44:52,953 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:44:52,953 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:44:52,954 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:44:52,954 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:44:52,954 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:44:52,955 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:44:52,955 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:44:52,955 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:44:52,955 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:44:52,955 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:44:52,956 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:44:52,956 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:44:52,956 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:44:52,956 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:44:52,956 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:44:52,957 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:44:52,957 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:44:52,957 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:44:52,957 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:44:52,957 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:44:52,958 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:44:52,958 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:44:52,958 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:44:52,958 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:44:52,958 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:44:52,959 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:44:53,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:44:53,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:44:53,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:44:53,022 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:44:53,023 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:44:53,024 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-11-06 22:44:53,085 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3af95892/32aae41acbdd4406be6cc2d61e635464/FLAG5424d1b81 [2018-11-06 22:44:53,524 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:44:53,525 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-11-06 22:44:53,532 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3af95892/32aae41acbdd4406be6cc2d61e635464/FLAG5424d1b81 [2018-11-06 22:44:53,553 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3af95892/32aae41acbdd4406be6cc2d61e635464 [2018-11-06 22:44:53,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:44:53,566 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:44:53,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:53,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:44:53,576 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:44:53,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2228132a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53, skipping insertion in model container [2018-11-06 22:44:53,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:44:53,620 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:44:53,866 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:53,871 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:44:53,891 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:53,908 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:44:53,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53 WrapperNode [2018-11-06 22:44:53,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:53,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:53,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:44:53,910 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:44:53,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:53,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:44:53,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:44:53,946 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:44:53,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... [2018-11-06 22:44:53,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:44:53,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:44:53,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:44:53,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:44:53,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:44:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:44:54,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:44:54,319 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:44:54,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:54 BoogieIcfgContainer [2018-11-06 22:44:54,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:44:54,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:44:54,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:44:54,324 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:44:54,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:53" (1/3) ... [2018-11-06 22:44:54,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446f0672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:54, skipping insertion in model container [2018-11-06 22:44:54,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:53" (2/3) ... [2018-11-06 22:44:54,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446f0672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:54, skipping insertion in model container [2018-11-06 22:44:54,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:54" (3/3) ... [2018-11-06 22:44:54,328 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_true-unreach-call1_true-termination.i [2018-11-06 22:44:54,338 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:44:54,346 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:44:54,362 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:44:54,396 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:44:54,397 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:44:54,397 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:44:54,397 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:44:54,397 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:44:54,397 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:44:54,397 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:44:54,397 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:44:54,397 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:44:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-11-06 22:44:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:44:54,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:54,416 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:44:54,418 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:54,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 889845351, now seen corresponding path program 1 times [2018-11-06 22:44:54,426 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:54,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:54,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:54,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:54,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:54,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:44:54,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:44:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:44:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:44:54,544 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-11-06 22:44:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:54,558 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-11-06 22:44:54,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:44:54,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:44:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:54,570 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:44:54,571 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:44:54,574 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:44:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:44:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:44:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:44:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-11-06 22:44:54,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-11-06 22:44:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:54,609 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-11-06 22:44:54,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:44:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-11-06 22:44:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:44:54,610 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:54,610 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:54,610 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:54,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1805925645, now seen corresponding path program 1 times [2018-11-06 22:44:54,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:54,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:54,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:54,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:54,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:54,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:44:54,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:44:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:44:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:54,805 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-11-06 22:44:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:54,915 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:44:54,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:44:54,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:44:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:54,916 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:44:54,916 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:44:54,917 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:44:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:44:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-11-06 22:44:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:44:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-11-06 22:44:54,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-11-06 22:44:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:54,923 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-11-06 22:44:54,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:44:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-11-06 22:44:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:44:54,924 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:54,924 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:54,925 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:54,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:54,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1078158165, now seen corresponding path program 1 times [2018-11-06 22:44:54,925 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:54,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:55,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:55,134 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:55,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:55,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:55,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:55,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:44:55,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:44:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:44:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:44:55,259 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-11-06 22:44:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:55,393 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-06 22:44:55,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:44:55,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-06 22:44:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:55,395 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:44:55,395 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:44:55,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:44:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:44:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-11-06 22:44:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:44:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:44:55,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-11-06 22:44:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:55,400 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:44:55,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:44:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:44:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:44:55,401 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:55,401 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:55,402 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:55,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:55,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1814605, now seen corresponding path program 2 times [2018-11-06 22:44:55,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:55,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:55,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:55,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:55,703 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:55,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:44:55,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:44:55,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:55,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:55,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:55,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:44:55,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:44:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:44:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:44:55,793 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-11-06 22:44:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:56,100 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:44:56,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:44:56,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-06 22:44:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:56,101 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:44:56,101 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:44:56,102 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:44:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:44:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-06 22:44:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:44:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-06 22:44:56,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-11-06 22:44:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:56,108 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-06 22:44:56,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:44:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-06 22:44:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:44:56,108 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:56,109 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:56,109 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:56,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash -129408661, now seen corresponding path program 3 times [2018-11-06 22:44:56,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:56,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:56,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:56,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:56,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:56,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:56,373 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:56,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:56,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:44:56,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:56,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:56,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:56,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:44:56,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:44:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:44:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:44:56,493 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-11-06 22:44:56,870 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-06 22:44:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:57,154 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-06 22:44:57,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:44:57,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-11-06 22:44:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:57,157 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:44:57,157 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:44:57,158 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:44:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:44:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-11-06 22:44:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:44:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:44:57,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-11-06 22:44:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:57,163 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:44:57,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:44:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:44:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:44:57,163 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:57,164 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:57,164 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:57,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash -981486707, now seen corresponding path program 4 times [2018-11-06 22:44:57,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:57,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:57,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:57,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:57,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:57,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:57,411 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:57,425 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:57,462 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:57,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:57,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:57,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:57,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:44:57,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:44:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:44:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:44:57,578 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2018-11-06 22:44:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:58,055 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:44:58,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:44:58,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-11-06 22:44:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:58,060 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:44:58,060 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:44:58,061 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:44:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:44:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-06 22:44:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:44:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-06 22:44:58,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-11-06 22:44:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:58,066 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-06 22:44:58,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:44:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-06 22:44:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:44:58,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:58,068 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:58,068 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:58,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1981835733, now seen corresponding path program 5 times [2018-11-06 22:44:58,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:58,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:58,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:58,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:58,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:58,393 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:58,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:58,837 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:44:58,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:58,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:58,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:58,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:44:58,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:44:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:44:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:44:58,925 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-11-06 22:44:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:59,338 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-06 22:44:59,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:44:59,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-11-06 22:44:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:59,340 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:44:59,341 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:44:59,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:44:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:44:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-11-06 22:44:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:44:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:44:59,347 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-11-06 22:44:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:59,347 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:44:59,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:44:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:44:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:44:59,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:59,348 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:59,349 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:59,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -601602355, now seen corresponding path program 6 times [2018-11-06 22:44:59,349 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:59,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:59,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:59,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:59,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:59,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:59,792 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:44:59,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:44:59,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:59,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:59,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:59,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:44:59,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:44:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:44:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:44:59,892 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 15 states. [2018-11-06 22:45:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:00,293 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:45:00,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:45:00,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-11-06 22:45:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:00,295 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:45:00,295 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:45:00,296 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:45:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:45:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-06 22:45:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:45:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-11-06 22:45:00,302 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-11-06 22:45:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:00,302 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-11-06 22:45:00,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:45:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-11-06 22:45:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:45:00,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:00,303 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:00,303 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:00,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2085930261, now seen corresponding path program 7 times [2018-11-06 22:45:00,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:00,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:00,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:00,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:00,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:00,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:00,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:00,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:45:00,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:45:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:45:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:45:00,867 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2018-11-06 22:45:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:01,526 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-06 22:45:01,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:45:01,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2018-11-06 22:45:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:01,531 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:45:01,531 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:45:01,532 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:45:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:45:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-11-06 22:45:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:45:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:45:01,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-11-06 22:45:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:01,538 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:45:01,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:45:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:45:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:45:01,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:01,539 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:01,540 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:01,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:01,540 INFO L82 PathProgramCache]: Analyzing trace with hash -715298291, now seen corresponding path program 8 times [2018-11-06 22:45:01,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:01,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:01,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:01,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:01,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:02,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:02,040 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:02,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:45:02,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:45:02,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:02,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:02,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:02,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:45:02,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:45:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:45:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:45:02,167 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-11-06 22:45:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:02,873 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:45:02,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:45:02,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-11-06 22:45:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:02,874 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:45:02,874 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:45:02,876 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:45:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:45:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-11-06 22:45:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:45:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-06 22:45:02,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-11-06 22:45:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:02,883 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-06 22:45:02,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:45:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-06 22:45:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:45:02,884 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:02,884 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:02,884 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:02,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash -472363093, now seen corresponding path program 9 times [2018-11-06 22:45:02,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:02,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:02,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:02,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:02,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:03,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:03,300 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:03,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:45:03,385 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:45:03,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:03,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:03,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:03,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:45:03,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:45:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:45:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:45:03,454 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 21 states. [2018-11-06 22:45:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:04,374 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-06 22:45:04,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:45:04,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2018-11-06 22:45:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:04,376 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:45:04,376 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:45:04,378 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:45:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:45:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-06 22:45:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:45:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:45:04,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-11-06 22:45:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:04,383 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:45:04,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:45:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:45:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:45:04,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:04,385 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:04,385 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:04,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -209773235, now seen corresponding path program 10 times [2018-11-06 22:45:04,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:04,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:04,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:04,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:04,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:04,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:04,845 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:04,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:45:04,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:45:04,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:04,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:05,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:05,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:45:05,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:45:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:45:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:45:05,025 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 23 states. [2018-11-06 22:45:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:06,025 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:45:06,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:45:06,026 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2018-11-06 22:45:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:06,027 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:45:06,027 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:45:06,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:45:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:45:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-11-06 22:45:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:45:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-11-06 22:45:06,034 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-11-06 22:45:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:06,035 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-11-06 22:45:06,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:45:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-11-06 22:45:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:45:06,036 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:06,036 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:06,036 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:06,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1469240427, now seen corresponding path program 11 times [2018-11-06 22:45:06,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:06,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:06,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:06,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:06,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:06,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:06,641 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:06,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:46:33,326 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:46:33,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:34,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:34,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:34,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:46:34,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:46:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:46:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:46:34,120 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 25 states. [2018-11-06 22:46:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:35,058 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-06 22:46:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:46:35,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2018-11-06 22:46:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:35,059 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:46:35,059 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:46:35,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:46:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:46:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-11-06 22:46:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:46:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:46:35,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-11-06 22:46:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:35,065 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:46:35,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:46:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:46:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:46:35,066 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:35,066 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:35,067 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:35,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1776115853, now seen corresponding path program 12 times [2018-11-06 22:46:35,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:35,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:35,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:35,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:35,871 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:35,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:47:25,093 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:47:25,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:47:25,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:25,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:25,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-06 22:47:25,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:47:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:47:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:47:25,254 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 27 states. [2018-11-06 22:47:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:47:26,666 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:47:26,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:47:26,674 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 43 [2018-11-06 22:47:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:47:26,675 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:47:26,675 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:47:26,679 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:47:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:47:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-11-06 22:47:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:47:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-11-06 22:47:26,687 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-11-06 22:47:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:47:26,687 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-11-06 22:47:26,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:47:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-11-06 22:47:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:47:26,692 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:47:26,692 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:47:26,692 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:47:26,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:47:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -83441365, now seen corresponding path program 13 times [2018-11-06 22:47:26,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:47:26,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:47:26,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:26,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:47:26,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:27,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:47:27,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:47:27,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:47:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:27,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:27,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:27,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-06 22:47:27,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:47:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:47:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:47:27,518 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 29 states. [2018-11-06 22:47:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:47:28,511 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-11-06 22:47:28,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:47:28,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2018-11-06 22:47:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:47:28,513 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:47:28,513 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:47:28,515 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:47:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:47:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-11-06 22:47:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:47:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:47:28,523 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-11-06 22:47:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:47:28,524 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:47:28,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:47:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:47:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:47:28,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:47:28,528 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:47:28,528 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:47:28,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:47:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1664338995, now seen corresponding path program 14 times [2018-11-06 22:47:28,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:47:28,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:47:28,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:28,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:47:28,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:29,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:47:29,105 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:47:29,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:47:29,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:47:29,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:47:29,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:47:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:29,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:47:29,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-06 22:47:29,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:47:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:47:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:47:29,202 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 31 states. [2018-11-06 22:47:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:47:30,470 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:47:30,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:47:30,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2018-11-06 22:47:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:47:30,472 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:47:30,472 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:47:30,474 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 22:47:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:47:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-11-06 22:47:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-06 22:47:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-11-06 22:47:30,481 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-11-06 22:47:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:47:30,481 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-11-06 22:47:30,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:47:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-11-06 22:47:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:47:30,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:47:30,482 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:47:30,482 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:47:30,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:47:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash 425733611, now seen corresponding path program 15 times [2018-11-06 22:47:30,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:47:30,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:47:30,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:30,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:47:30,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:47:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:47:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:47:31,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:47:31,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:47:31,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:10,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:49:10,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:10,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:10,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:10,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-06 22:49:10,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:49:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:49:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:49:10,802 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 33 states. [2018-11-06 22:49:11,936 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-06 22:49:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:12,417 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-11-06 22:49:12,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:49:12,417 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2018-11-06 22:49:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:12,418 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:49:12,418 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:49:12,420 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:49:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:49:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-06 22:49:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-06 22:49:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-06 22:49:12,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-11-06 22:49:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:12,426 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-06 22:49:12,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:49:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-06 22:49:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:49:12,427 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:12,427 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:12,428 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:12,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1637848845, now seen corresponding path program 16 times [2018-11-06 22:49:12,428 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:12,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:12,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:12,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:12,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:14,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:14,219 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:49:14,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:14,262 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:14,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:14,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:14,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:14,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-06 22:49:14,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:49:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:49:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:49:14,321 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 35 states. [2018-11-06 22:49:15,686 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-06 22:49:16,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:16,287 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:49:16,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:49:16,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 55 [2018-11-06 22:49:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:16,289 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:49:16,289 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:49:16,292 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:49:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:49:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-11-06 22:49:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:49:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-11-06 22:49:16,297 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-11-06 22:49:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:16,298 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-11-06 22:49:16,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:49:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-11-06 22:49:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:49:16,299 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:16,299 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:16,299 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:16,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash -322239829, now seen corresponding path program 17 times [2018-11-06 22:49:16,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:16,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:16,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:17,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:17,239 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:49:17,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown