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/for_bounded_loop1_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:00,437 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:00,440 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:00,452 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:00,453 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:00,454 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:00,455 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:00,457 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:00,459 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:00,460 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:00,461 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:00,462 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:00,463 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:00,464 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:00,465 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:00,466 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:00,467 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:00,469 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:00,471 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:00,473 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:00,475 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:00,476 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:00,479 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:00,489 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 15:36:00,506 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:00,506 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:00,507 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:00,507 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:00,508 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:00,508 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:00,509 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:00,509 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:00,509 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:00,509 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:00,510 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:00,510 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:00,510 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:00,510 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:00,511 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:00,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:00,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:00,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:00,511 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:00,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:00,512 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:00,512 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:00,512 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:00,512 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:00,513 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:00,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:00,513 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:00,513 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:00,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:00,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:00,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:00,590 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:00,591 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:00,592 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 15:36:00,660 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2032811a/ea2cdc47553b42cca4670d61f0c8a6af/FLAG5a94633a3 [2018-10-22 15:36:01,144 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:01,145 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 15:36:01,151 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2032811a/ea2cdc47553b42cca4670d61f0c8a6af/FLAG5a94633a3 [2018-10-22 15:36:01,166 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2032811a/ea2cdc47553b42cca4670d61f0c8a6af [2018-10-22 15:36:01,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:01,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:01,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:01,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:01,185 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:01,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3816c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01, skipping insertion in model container [2018-10-22 15:36:01,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:01,222 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:01,479 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:01,484 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:01,507 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:01,527 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:01,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01 WrapperNode [2018-10-22 15:36:01,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:01,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:01,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:01,530 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:01,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:01,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:01,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:01,578 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:01,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:01,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:01,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:01,611 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:01,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (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 15:36:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:01,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:36:01,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:36:02,083 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:02,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:02 BoogieIcfgContainer [2018-10-22 15:36:02,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:02,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:02,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:02,088 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:02,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:01" (1/3) ... [2018-10-22 15:36:02,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7141cd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:02, skipping insertion in model container [2018-10-22 15:36:02,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (2/3) ... [2018-10-22 15:36:02,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7141cd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:02, skipping insertion in model container [2018-10-22 15:36:02,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:02" (3/3) ... [2018-10-22 15:36:02,092 INFO L112 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-22 15:36:02,101 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:02,108 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:02,124 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:02,163 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:02,164 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:02,164 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:02,164 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:02,164 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:02,164 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:02,164 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:02,164 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:02,165 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-22 15:36:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:36:02,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:02,189 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:02,191 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:02,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash 195309163, now seen corresponding path program 1 times [2018-10-22 15:36:02,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:02,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:02,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:02,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:02,325 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 15:36:02,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:02,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:02,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:02,349 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-22 15:36:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:02,376 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2018-10-22 15:36:02,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:02,377 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-22 15:36:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:02,389 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:36:02,390 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 15:36:02,394 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 15:36:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 15:36:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-22 15:36:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:36:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-22 15:36:02,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 8 [2018-10-22 15:36:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:02,440 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-22 15:36:02,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-22 15:36:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:36:02,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:02,442 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:02,442 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:02,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1242769792, now seen corresponding path program 1 times [2018-10-22 15:36:02,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:02,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:02,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:02,770 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 15:36:02,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:02,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 15:36:02,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:36:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:36:02,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:02,778 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2018-10-22 15:36:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:03,092 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-10-22 15:36:03,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:03,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-22 15:36:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:03,094 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:36:03,094 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 15:36:03,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:36:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 15:36:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-10-22 15:36:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:36:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-22 15:36:03,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2018-10-22 15:36:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:03,106 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-22 15:36:03,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:36:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-22 15:36:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:36:03,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:03,109 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:03,109 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:03,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1501499656, now seen corresponding path program 1 times [2018-10-22 15:36:03,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:03,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:03,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:03,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:03,428 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 15:36:03,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:03,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:03,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:03,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2018-10-22 15:36:03,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:36:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:36:03,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:03,724 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2018-10-22 15:36:04,128 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-10-22 15:36:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:04,322 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-22 15:36:04,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:36:04,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-10-22 15:36:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:04,324 INFO L225 Difference]: With dead ends: 35 [2018-10-22 15:36:04,324 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:36:04,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:36:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-22 15:36:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:36:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-22 15:36:04,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 16 [2018-10-22 15:36:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:04,333 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-22 15:36:04,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:36:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-22 15:36:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 15:36:04,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:04,335 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:04,335 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:04,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:04,336 INFO L82 PathProgramCache]: Analyzing trace with hash 805485160, now seen corresponding path program 1 times [2018-10-22 15:36:04,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:04,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:04,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:04,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:36:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:36:04,377 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 15:36:04,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:36:04 BoogieIcfgContainer [2018-10-22 15:36:04,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:36:04,407 INFO L168 Benchmark]: Toolchain (without parser) took 3230.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -703.9 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:04,409 INFO L168 Benchmark]: CDTParser took 0.28 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. [2018-10-22 15:36:04,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.75 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 15:36:04,410 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.64 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 15:36:04,411 INFO L168 Benchmark]: Boogie Preprocessor took 32.82 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: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:04,412 INFO L168 Benchmark]: RCFGBuilder took 473.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:04,413 INFO L168 Benchmark]: TraceAbstraction took 2321.66 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: 97.0 MB). Peak memory consumption was 97.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:36:04,418 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 349.75 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 47.64 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 32.82 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: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2321.66 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: 97.0 MB). Peak memory consumption was 97.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 [L17] COND TRUE i