java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:59,487 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:59,489 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:59,507 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:59,508 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:59,509 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:59,510 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:59,513 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:59,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:59,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:59,519 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:59,519 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:59,520 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:59,521 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:59,522 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:59,525 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:59,532 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:59,534 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:59,538 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:59,541 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:59,543 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:59,545 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:59,548 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:59,561 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:36:59,576 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:59,576 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:59,577 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:59,577 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:59,578 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:59,578 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:59,578 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:59,579 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:59,579 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:59,579 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:59,579 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:59,579 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:59,580 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:59,580 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:59,580 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:59,580 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:59,580 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:59,581 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:59,581 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:59,581 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:59,581 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:59,581 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:59,581 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:59,582 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:59,582 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:59,582 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:59,582 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:59,582 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:59,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:59,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:59,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:59,656 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:59,657 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:59,658 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-10-22 15:36:59,719 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c6238cd/d965d28bffed47f08204daed7d5bcd0d/FLAGb2677cbe8 [2018-10-22 15:37:00,163 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:37:00,164 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-10-22 15:37:00,170 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c6238cd/d965d28bffed47f08204daed7d5bcd0d/FLAGb2677cbe8 [2018-10-22 15:37:00,186 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c6238cd/d965d28bffed47f08204daed7d5bcd0d [2018-10-22 15:37:00,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:37:00,201 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:37:00,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:37:00,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:37:00,206 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:37:00,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534bfa33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00, skipping insertion in model container [2018-10-22 15:37:00,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:37:00,242 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:37:00,418 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:37:00,422 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:37:00,441 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:37:00,456 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:37:00,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00 WrapperNode [2018-10-22 15:37:00,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:37:00,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:37:00,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:37:00,458 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:37:00,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:37:00,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:37:00,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:37:00,497 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:37:00,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... [2018-10-22 15:37:00,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:37:00,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:37:00,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:37:00,517 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:37:00,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:37:00,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:37:00,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:37:00,838 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:37:00,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:37:00 BoogieIcfgContainer [2018-10-22 15:37:00,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:37:00,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:37:00,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:37:00,843 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:37:00,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:37:00" (1/3) ... [2018-10-22 15:37:00,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361058fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:37:00, skipping insertion in model container [2018-10-22 15:37:00,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:37:00" (2/3) ... [2018-10-22 15:37:00,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361058fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:37:00, skipping insertion in model container [2018-10-22 15:37:00,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:37:00" (3/3) ... [2018-10-22 15:37:00,846 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11_true-unreach-call_false-termination.i [2018-10-22 15:37:00,856 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:37:00,864 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:37:00,881 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:37:00,914 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:37:00,915 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:37:00,915 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:37:00,915 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:37:00,916 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:37:00,916 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:37:00,916 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:37:00,916 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:37:00,916 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:37:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:37:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:37:00,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:00,937 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:37:00,940 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:00,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2018-10-22 15:37:00,949 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:00,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:01,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:01,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:01,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:37:01,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:37:01,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:37:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:37:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:37:01,080 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:37:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:01,097 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 15:37:01,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:37:01,099 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:37:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:01,108 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:37:01,108 INFO L226 Difference]: Without dead ends: 10 [2018-10-22 15:37:01,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:37:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-22 15:37:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-22 15:37:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-22 15:37:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-22 15:37:01,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-10-22 15:37:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:01,150 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-22 15:37:01,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:37:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-22 15:37:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:37:01,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:01,151 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:01,151 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:01,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1805930610, now seen corresponding path program 1 times [2018-10-22 15:37:01,152 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:01,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:01,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:01,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:37:01,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:37:01,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:37:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:37:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:37:01,441 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2018-10-22 15:37:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:01,703 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-22 15:37:01,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:37:01,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-22 15:37:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:01,705 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:37:01,705 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:37:01,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:37:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:37:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-10-22 15:37:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:37:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:37:01,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2018-10-22 15:37:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:01,710 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:37:01,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:37:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:37:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:37:01,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:01,711 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:01,714 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:01,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash -327372406, now seen corresponding path program 1 times [2018-10-22 15:37:01,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:01,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:01,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:01,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:01,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:01,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:01,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:01,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:01,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:01,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:37:01,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:37:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:37:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:37:01,979 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-10-22 15:37:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:02,125 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2018-10-22 15:37:02,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:37:02,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:37:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:02,127 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:37:02,127 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:37:02,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:37:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:37:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:37:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:37:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-22 15:37:02,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-22 15:37:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:02,136 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-22 15:37:02,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:37:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-22 15:37:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:37:02,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:02,138 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:02,139 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:02,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1718696286, now seen corresponding path program 2 times [2018-10-22 15:37:02,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:02,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:02,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:02,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:02,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:02,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:02,462 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:02,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:37:02,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:37:02,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:02,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:02,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:02,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:37:02,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:37:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:37:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:37:02,580 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-10-22 15:37:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:02,670 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-10-22 15:37:02,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:37:02,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-22 15:37:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:02,672 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:37:02,673 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:37:02,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:37:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:37:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-22 15:37:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:37:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 15:37:02,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2018-10-22 15:37:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:02,678 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 15:37:02,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:37:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 15:37:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:37:02,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:02,680 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:02,680 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:02,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1763668038, now seen corresponding path program 3 times [2018-10-22 15:37:02,681 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:02,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:02,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:02,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:02,989 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:03,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:37:03,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:37:03,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:03,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:03,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:03,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:37:03,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:37:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:37:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:37:03,148 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-22 15:37:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:03,282 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-22 15:37:03,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:37:03,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:37:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:03,284 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:37:03,285 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:37:03,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:37:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:37:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:37:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:37:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 15:37:03,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2018-10-22 15:37:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:03,290 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 15:37:03,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:37:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 15:37:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:37:03,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:03,292 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:03,292 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:03,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:03,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1787294510, now seen corresponding path program 4 times [2018-10-22 15:37:03,293 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:03,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:03,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:03,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:03,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:03,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:03,793 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:03,803 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:37:03,814 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:37:03,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:03,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:03,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:03,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:37:03,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:37:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:37:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:37:03,881 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-10-22 15:37:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:04,023 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-10-22 15:37:04,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:37:04,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-10-22 15:37:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:04,025 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:37:04,025 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:37:04,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:37:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:37:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:37:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:37:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:37:04,028 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-10-22 15:37:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:04,028 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:37:04,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:37:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:37:04,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:37:04,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:37:04,108 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:37:04,109 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L421 ceAbstractionStarter]: At program point L13-3(lines 13 18) the Hoare annotation is: (or (and (<= 3 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 3)) (and (<= ULTIMATE.start_main_~len~0 4) (<= 4 ULTIMATE.start_main_~len~0)) (and (<= 1 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 1)) (and (<= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 2)) (and (<= 0 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 0))) [2018-10-22 15:37:04,110 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L428 ceAbstractionStarter]: At program point L3-2(lines 2 7) the Hoare annotation is: true [2018-10-22 15:37:04,110 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:37:04,110 INFO L428 ceAbstractionStarter]: At program point L20(lines 9 21) the Hoare annotation is: true [2018-10-22 15:37:04,111 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 15:37:04,111 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 15) no Hoare annotation was computed. [2018-10-22 15:37:04,111 INFO L425 ceAbstractionStarter]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2018-10-22 15:37:04,111 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 15:37:04,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:37:04 BoogieIcfgContainer [2018-10-22 15:37:04,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:37:04,127 INFO L168 Benchmark]: Toolchain (without parser) took 3928.22 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 711.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -596.7 MB). Peak memory consumption was 114.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:37:04,129 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:37:04,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:37:04,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:37:04,131 INFO L168 Benchmark]: Boogie Preprocessor took 19.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:37:04,132 INFO L168 Benchmark]: RCFGBuilder took 322.11 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 711.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -768.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:37:04,133 INFO L168 Benchmark]: TraceAbstraction took 3286.58 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 160.9 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:37:04,137 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 322.11 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 711.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -768.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3286.58 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 160.9 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((3 <= len && len <= 3) || (len <= 4 && 4 <= len)) || (1 <= len && len <= 1)) || (2 <= len && len <= 2)) || (0 <= len && len <= 0) - InvariantResult [Line: 2]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. SAFE Result, 3.2s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 14 SDslu, 184 SDs, 0 SdLazy, 182 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 38 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 149 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 13589 SizeOfPredicates, 12 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...