java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 10:19:35,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 10:19:35,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 10:19:35,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 10:19:35,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 10:19:35,489 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 10:19:35,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 10:19:35,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 10:19:35,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 10:19:35,491 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 10:19:35,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 10:19:35,492 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 10:19:35,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 10:19:35,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 10:19:35,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 10:19:35,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 10:19:35,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 10:19:35,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 10:19:35,493 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 10:19:35,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 10:19:35,493 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 10:19:35,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 10:19:35,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 10:19:35,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 10:19:35,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 10:19:35,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 10:19:35,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 10:19:35,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 10:19:35,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 10:19:35,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 10:19:35,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 10:19:35,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 10:19:35,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 10:19:35,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 10:19:35,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 10:19:35,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 10:19:35,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 10:19:35,545 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 10:19:35,546 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 10:19:35,547 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-02 10:19:35,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecd82547/222a8496d222433c99ebfff7c276ef99/FLAG04377edda [2019-10-02 10:19:36,017 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 10:19:36,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-02 10:19:36,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecd82547/222a8496d222433c99ebfff7c276ef99/FLAG04377edda [2019-10-02 10:19:36,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ecd82547/222a8496d222433c99ebfff7c276ef99 [2019-10-02 10:19:36,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 10:19:36,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 10:19:36,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 10:19:36,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 10:19:36,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 10:19:36,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35da1448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36, skipping insertion in model container [2019-10-02 10:19:36,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,419 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 10:19:36,433 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 10:19:36,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 10:19:36,590 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 10:19:36,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 10:19:36,625 INFO L192 MainTranslator]: Completed translation [2019-10-02 10:19:36,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36 WrapperNode [2019-10-02 10:19:36,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 10:19:36,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 10:19:36,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 10:19:36,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 10:19:36,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... [2019-10-02 10:19:36,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 10:19:36,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 10:19:36,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 10:19:36,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 10:19:36,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 10:19:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 10:19:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 10:19:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-02 10:19:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-10-02 10:19:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 10:19:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 10:19:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-02 10:19:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-10-02 10:19:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 10:19:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 10:19:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 10:19:36,963 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 10:19:36,964 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 10:19:36,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:19:36 BoogieIcfgContainer [2019-10-02 10:19:36,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 10:19:36,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 10:19:36,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 10:19:36,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 10:19:36,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 10:19:36" (1/3) ... [2019-10-02 10:19:36,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bb1c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:19:36, skipping insertion in model container [2019-10-02 10:19:36,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 10:19:36" (2/3) ... [2019-10-02 10:19:36,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bb1c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 10:19:36, skipping insertion in model container [2019-10-02 10:19:36,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 10:19:36" (3/3) ... [2019-10-02 10:19:36,974 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-10-02 10:19:36,984 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 10:19:36,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 10:19:37,008 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 10:19:37,037 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 10:19:37,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 10:19:37,038 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 10:19:37,038 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 10:19:37,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 10:19:37,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 10:19:37,039 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 10:19:37,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 10:19:37,039 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 10:19:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-02 10:19:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-02 10:19:37,059 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 10:19:37,060 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 10:19:37,063 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 10:19:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 10:19:37,068 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-10-02 10:19:37,070 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 10:19:37,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 10:19:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 10:19:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 10:19:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 10:19:37,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 10:19:37,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 10:19:37,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 10:19:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 10:19:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-02 10:19:37,316 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-10-02 10:19:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 10:19:37,455 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-10-02 10:19:37,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 10:19:37,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-02 10:19:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 10:19:37,465 INFO L225 Difference]: With dead ends: 42 [2019-10-02 10:19:37,466 INFO L226 Difference]: Without dead ends: 21 [2019-10-02 10:19:37,469 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-02 10:19:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-02 10:19:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-02 10:19:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-02 10:19:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-02 10:19:37,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-10-02 10:19:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 10:19:37,513 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-02 10:19:37,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 10:19:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-02 10:19:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 10:19:37,514 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 10:19:37,515 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 10:19:37,516 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 10:19:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 10:19:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-10-02 10:19:37,517 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 10:19:37,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 10:19:37,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 10:19:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 10:19:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 10:19:37,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 10:19:37,595 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 10:19:37,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 10:19:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 10:19:37,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 10:19:37,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 10:19:37,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 10:19:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 10:19:37,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 10:19:37,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-02 10:19:37,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 10:19:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 10:19:37,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-02 10:19:37,709 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-10-02 10:19:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 10:19:37,777 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-02 10:19:37,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 10:19:37,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-02 10:19:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 10:19:37,779 INFO L225 Difference]: With dead ends: 30 [2019-10-02 10:19:37,779 INFO L226 Difference]: Without dead ends: 27 [2019-10-02 10:19:37,781 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-02 10:19:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-02 10:19:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-02 10:19:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 10:19:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-02 10:19:37,789 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-10-02 10:19:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 10:19:37,790 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-02 10:19:37,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 10:19:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-02 10:19:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 10:19:37,793 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 10:19:37,793 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 10:19:37,794 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 10:19:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 10:19:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-10-02 10:19:37,794 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 10:19:37,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 10:19:37,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 10:19:37,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 10:19:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 10:19:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 10:19:37,857 INFO L478 BasicCegarLoop]: Counterexample might be feasible [2019-10-02 10:19:37,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 10:19:37 BoogieIcfgContainer [2019-10-02 10:19:37,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 10:19:37,884 INFO L168 Benchmark]: Toolchain (without parser) took 1479.37 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 89.8 MB in the beginning and 114.1 MB in the end (delta: -24.3 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,885 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.02 ms. Allocated memory is still 133.7 MB. Free memory was 89.4 MB in the beginning and 80.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,887 INFO L168 Benchmark]: Boogie Preprocessor took 121.18 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 80.4 MB in the beginning and 177.8 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,888 INFO L168 Benchmark]: RCFGBuilder took 216.59 ms. Allocated memory is still 200.8 MB. Free memory was 177.8 MB in the beginning and 166.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,889 INFO L168 Benchmark]: TraceAbstraction took 914.65 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 114.1 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2019-10-02 10:19:37,893 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.02 ms. Allocated memory is still 133.7 MB. Free memory was 89.4 MB in the beginning and 80.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.18 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 80.4 MB in the beginning and 177.8 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 216.59 ms. Allocated memory is still 200.8 MB. Free memory was 177.8 MB in the beginning and 166.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 914.65 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 114.1 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 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: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 17 SDslu, 89 SDs, 0 SdLazy, 45 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...