java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:59:11,807 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:59:11,810 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:59:11,825 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:59:11,825 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:59:11,827 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:59:11,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:59:11,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:59:11,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:59:11,833 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:59:11,834 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:59:11,835 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:59:11,836 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:59:11,837 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:59:11,838 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:59:11,839 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:59:11,840 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:59:11,841 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:59:11,843 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:59:11,845 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:59:11,846 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:59:11,847 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:59:11,849 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:59:11,857 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:59:11,874 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:59:11,874 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:59:11,875 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:59:11,875 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:59:11,876 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:59:11,876 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:59:11,876 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:59:11,877 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:59:11,877 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:59:11,877 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:59:11,877 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:59:11,877 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:59:11,878 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:59:11,878 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:59:11,878 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:59:11,878 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:59:11,878 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:59:11,879 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:59:11,879 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:59:11,879 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:59:11,879 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:59:11,879 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:59:11,880 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:59:11,880 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:59:11,880 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:59:11,880 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:59:11,880 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:59:11,881 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:59:11,943 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:59:11,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:59:11,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:59:11,965 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:59:11,965 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:59:11,966 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-24 11:59:12,022 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef29828a/bc6a8ea2823642c5a4e76fd6ceb9f439/FLAG894a91ac1 [2018-10-24 11:59:12,443 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:59:12,443 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-24 11:59:12,450 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef29828a/bc6a8ea2823642c5a4e76fd6ceb9f439/FLAG894a91ac1 [2018-10-24 11:59:12,476 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef29828a/bc6a8ea2823642c5a4e76fd6ceb9f439 [2018-10-24 11:59:12,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:59:12,498 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:59:12,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:12,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:59:12,503 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:59:12,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b071f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12, skipping insertion in model container [2018-10-24 11:59:12,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:59:12,544 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:59:12,745 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:12,750 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:59:12,769 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:12,786 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:59:12,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12 WrapperNode [2018-10-24 11:59:12,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:12,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:12,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:59:12,788 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:59:12,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:12,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:59:12,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:59:12,826 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:59:12,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... [2018-10-24 11:59:12,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:59:12,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:59:12,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:59:12,848 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:59:12,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:59:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:59:12,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:59:13,168 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:59:13,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:13 BoogieIcfgContainer [2018-10-24 11:59:13,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:59:13,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:59:13,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:59:13,173 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:59:13,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:59:12" (1/3) ... [2018-10-24 11:59:13,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafa81b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:13, skipping insertion in model container [2018-10-24 11:59:13,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:12" (2/3) ... [2018-10-24 11:59:13,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafa81b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:13, skipping insertion in model container [2018-10-24 11:59:13,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:13" (3/3) ... [2018-10-24 11:59:13,176 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005_true-unreach-call_true-termination.c.i [2018-10-24 11:59:13,186 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:59:13,194 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:59:13,211 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:59:13,249 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:59:13,249 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:59:13,250 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:59:13,250 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:59:13,250 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:59:13,250 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:59:13,250 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:59:13,250 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:59:13,251 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:59:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-24 11:59:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-24 11:59:13,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:13,277 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-24 11:59:13,280 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:13,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-10-24 11:59:13,294 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:13,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:13,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:13,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:59:13,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:59:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:59:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:59:13,426 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-10-24 11:59:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:13,443 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-24 11:59:13,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:59:13,445 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-24 11:59:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:13,455 INFO L225 Difference]: With dead ends: 20 [2018-10-24 11:59:13,456 INFO L226 Difference]: Without dead ends: 8 [2018-10-24 11:59:13,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:59:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-24 11:59:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-24 11:59:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-24 11:59:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-24 11:59:13,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-24 11:59:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:13,495 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-24 11:59:13,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:59:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-24 11:59:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 11:59:13,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:13,496 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:13,496 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:13,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-10-24 11:59:13,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:13,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:13,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:13,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:13,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:59:13,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:59:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:59:13,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:59:13,589 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-10-24 11:59:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:13,652 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-24 11:59:13,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:59:13,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 11:59:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:13,653 INFO L225 Difference]: With dead ends: 14 [2018-10-24 11:59:13,653 INFO L226 Difference]: Without dead ends: 10 [2018-10-24 11:59:13,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:59:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-24 11:59:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-24 11:59:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-24 11:59:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-24 11:59:13,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-24 11:59:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:13,659 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-24 11:59:13,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:59:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-24 11:59:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:59:13,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:13,660 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:13,660 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:13,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-10-24 11:59:13,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:13,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:13,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:13,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:13,818 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:13,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:14,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-24 11:59:14,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:59:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:59:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:59:14,042 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-10-24 11:59:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:14,099 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-24 11:59:14,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:59:14,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-24 11:59:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:14,102 INFO L225 Difference]: With dead ends: 16 [2018-10-24 11:59:14,102 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 11:59:14,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:59:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 11:59:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-24 11:59:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-24 11:59:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-24 11:59:14,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-24 11:59:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:14,110 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-24 11:59:14,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:59:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-24 11:59:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:59:14,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:14,115 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:14,115 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:14,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-10-24 11:59:14,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:14,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:14,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:14,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:14,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:14,196 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:14,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:14,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:14,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:14,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:14,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-24 11:59:14,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:59:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:59:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:14,446 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-10-24 11:59:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:14,481 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-24 11:59:14,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:59:14,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-10-24 11:59:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:14,482 INFO L225 Difference]: With dead ends: 18 [2018-10-24 11:59:14,482 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 11:59:14,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 11:59:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 11:59:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 11:59:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-24 11:59:14,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-24 11:59:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:14,487 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-24 11:59:14,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:59:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-24 11:59:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:59:14,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:14,488 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:14,488 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:14,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-10-24 11:59:14,489 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:14,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:14,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:14,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:14,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:14,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:14,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:14,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:59:14,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:14,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:14,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-10-24 11:59:14,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:59:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:59:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:59:14,979 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-10-24 11:59:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:15,025 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-24 11:59:15,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:59:15,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-10-24 11:59:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:15,028 INFO L225 Difference]: With dead ends: 20 [2018-10-24 11:59:15,028 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 11:59:15,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:59:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 11:59:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 11:59:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:59:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-24 11:59:15,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-24 11:59:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,032 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-24 11:59:15,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:59:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-24 11:59:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:59:15,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:15,034 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:15,034 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:15,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-10-24 11:59:15,035 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:15,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:15,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:15,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:15,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:15,323 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:15,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:15,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:15,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:15,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:15,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:15,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-24 11:59:15,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:59:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:59:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:15,448 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2018-10-24 11:59:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:15,587 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-24 11:59:15,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:59:15,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-24 11:59:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:15,588 INFO L225 Difference]: With dead ends: 22 [2018-10-24 11:59:15,589 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:59:15,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:59:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:59:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 11:59:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:59:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-24 11:59:15,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-24 11:59:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,594 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-24 11:59:15,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:59:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-24 11:59:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 11:59:15,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:15,595 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:15,595 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:15,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-10-24 11:59:15,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:15,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:15,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:15,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:15,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:15,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 11:59:15,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:59:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:59:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:59:15,903 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2018-10-24 11:59:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:15,933 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-24 11:59:15,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:59:15,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-24 11:59:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:15,935 INFO L225 Difference]: With dead ends: 18 [2018-10-24 11:59:15,935 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 11:59:15,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:59:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 11:59:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 11:59:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 11:59:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 11:59:15,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-10-24 11:59:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,937 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 11:59:15,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:59:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 11:59:15,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 11:59:15,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 11:59:16,145 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-10-24 11:59:16,149 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 11:59:16,149 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 11:59:16,150 INFO L428 ceAbstractionStarter]: At program point L19(lines 10 20) the Hoare annotation is: true [2018-10-24 11:59:16,150 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 11:59:16,150 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-24 11:59:16,150 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-24 11:59:16,150 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 11:59:16,150 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 17) no Hoare annotation was computed. [2018-10-24 11:59:16,151 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (or (and (< 5 ULTIMATE.start_main_~j~0) (<= (+ ULTIMATE.start_main_~j~0 3) ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6)) (and (<= ULTIMATE.start_main_~j~0 (+ ULTIMATE.start_main_~i~0 3)) (<= ULTIMATE.start_main_~i~0 5) (<= 8 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 1) (<= 10 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 (+ ULTIMATE.start_main_~i~0 9))) (and (<= 9 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 (+ ULTIMATE.start_main_~i~0 6)) (<= ULTIMATE.start_main_~i~0 3)) (and (<= 7 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 7))) [2018-10-24 11:59:16,151 INFO L425 ceAbstractionStarter]: For program point L14-4(lines 14 17) no Hoare annotation was computed. [2018-10-24 11:59:16,151 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 11:59:16,151 INFO L428 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-10-24 11:59:16,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:59:16 BoogieIcfgContainer [2018-10-24 11:59:16,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 11:59:16,167 INFO L168 Benchmark]: Toolchain (without parser) took 3672.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -639.3 MB). Peak memory consumption was 118.8 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:16,169 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:59:16,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.20 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. [2018-10-24 11:59:16,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.92 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. [2018-10-24 11:59:16,171 INFO L168 Benchmark]: Boogie Preprocessor took 22.01 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. [2018-10-24 11:59:16,171 INFO L168 Benchmark]: RCFGBuilder took 321.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:16,172 INFO L168 Benchmark]: TraceAbstraction took 2996.88 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 148.5 MB). Peak memory consumption was 148.5 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:16,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.20 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 37.92 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 22.01 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 321.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2996.88 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 148.5 MB). Peak memory consumption was 148.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: (((((5 < j && j + 3 <= i) && j <= 6) || ((j <= i + 3 && i <= 5) && 8 <= j)) || ((i <= 1 && 10 <= j) && j <= i + 9)) || ((9 <= j && j <= i + 6) && i <= 3)) || ((7 <= j && j <= i) && i <= 7) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. SAFE Result, 2.9s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 1 SDslu, 100 SDs, 0 SdLazy, 101 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 61 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 5685 SizeOfPredicates, 9 NumberOfNonLiveVariables, 124 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 30/110 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...