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/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:36,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:36,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:36,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:27:36,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:27:36,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:27:36,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:27:36,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:27:36,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:27:36,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:27:36,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:27:36,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:27:36,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:36,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:36,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:36,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:36,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:36,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:36,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:36,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:36,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:36,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:36,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:36,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:36,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:27:36,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:36,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:36,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:36,694 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 [2019-09-08 06:27:36,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:36,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:36,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:36,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:36,735 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:36,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:36,736 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:36,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:36,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:36,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:36,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:36,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:36,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:36,738 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:36,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:36,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:36,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:36,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:36,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:36,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:36,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:36,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:36,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:36,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:36,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:36,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:36,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:36,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:36,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:36,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:36,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:36,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:36,798 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:36,799 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:36,799 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2019-09-08 06:27:36,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7c8930c/7e7613e4a95b46a0bbdde0f7ffddd545/FLAG0e51355e6 [2019-09-08 06:27:37,256 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:37,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2019-09-08 06:27:37,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7c8930c/7e7613e4a95b46a0bbdde0f7ffddd545/FLAG0e51355e6 [2019-09-08 06:27:37,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7c8930c/7e7613e4a95b46a0bbdde0f7ffddd545 [2019-09-08 06:27:37,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:37,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:37,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:37,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:37,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:37,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87a0d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37, skipping insertion in model container [2019-09-08 06:27:37,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,646 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:37,663 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:37,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:37,906 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:37,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:37,946 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:37,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37 WrapperNode [2019-09-08 06:27:37,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:37,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:37,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:37,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:37,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (1/1) ... [2019-09-08 06:27:37,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:37,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:37,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:37,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:37,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (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 [2019-09-08 06:27:38,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:38,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:38,155 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:27:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:38,320 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:38,320 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:38,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:38 BoogieIcfgContainer [2019-09-08 06:27:38,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:38,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:38,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:38,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:38,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:37" (1/3) ... [2019-09-08 06:27:38,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b3a3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:38, skipping insertion in model container [2019-09-08 06:27:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:37" (2/3) ... [2019-09-08 06:27:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b3a3c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:38, skipping insertion in model container [2019-09-08 06:27:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:38" (3/3) ... [2019-09-08 06:27:38,330 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2019-09-08 06:27:38,341 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:38,349 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:38,383 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:38,465 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:38,469 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:38,469 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:38,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:38,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:38,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:38,470 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:38,470 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:38,470 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-08 06:27:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:38,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:38,506 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:38,508 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2019-09-08 06:27:38,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:38,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:38,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:38,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:38,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:38,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:38,688 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:38,701 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-09-08 06:27:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:38,763 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-08 06:27:38,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:38,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:38,777 INFO L225 Difference]: With dead ends: 33 [2019-09-08 06:27:38,778 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 06:27:38,781 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 06:27:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-08 06:27:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 06:27:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-09-08 06:27:38,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-09-08 06:27:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:38,820 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-09-08 06:27:38,821 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-09-08 06:27:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 06:27:38,822 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:38,823 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:38,823 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2019-09-08 06:27:38,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:38,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:38,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:38,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:38,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:38,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:38,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:38,900 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2019-09-08 06:27:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:38,923 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-09-08 06:27:38,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:38,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-08 06:27:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:38,925 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:27:38,925 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:38,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-09-08 06:27:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 06:27:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-09-08 06:27:38,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2019-09-08 06:27:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:38,934 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-09-08 06:27:38,934 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-09-08 06:27:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 06:27:38,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:38,935 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:38,936 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2019-09-08 06:27:38,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:38,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:27:39,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:39,100 INFO L223 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 [2019-09-08 06:27:39,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:39,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 06:27:39,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:39,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:39,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-09-08 06:27:39,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:27:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:27:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:27:39,212 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 10 states. [2019-09-08 06:27:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:39,380 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-09-08 06:27:39,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:27:39,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-09-08 06:27:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:39,382 INFO L225 Difference]: With dead ends: 37 [2019-09-08 06:27:39,383 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 06:27:39,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 06:27:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-09-08 06:27:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:27:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-08 06:27:39,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2019-09-08 06:27:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:39,392 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-08 06:27:39,392 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:27:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-08 06:27:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:27:39,393 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:39,394 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:39,394 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2019-09-08 06:27:39,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:39,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:39,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:39,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:39,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:27:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:27:39,506 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-08 06:27:39,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:39 BoogieIcfgContainer [2019-09-08 06:27:39,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:39,549 INFO L168 Benchmark]: Toolchain (without parser) took 1919.05 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 85.8 MB in the beginning and 97.4 MB in the end (delta: -11.6 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,551 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 104.6 MB in the beginning and 104.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.07 ms. Allocated memory is still 138.4 MB. Free memory was 85.4 MB in the beginning and 76.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,555 INFO L168 Benchmark]: Boogie Preprocessor took 39.70 ms. Allocated memory is still 138.4 MB. Free memory was 76.4 MB in the beginning and 75.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,556 INFO L168 Benchmark]: RCFGBuilder took 334.02 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 75.1 MB in the beginning and 167.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,558 INFO L168 Benchmark]: TraceAbstraction took 1222.29 ms. Allocated memory is still 199.2 MB. Free memory was 166.6 MB in the beginning and 97.4 MB in the end (delta: 69.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:39,568 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 104.6 MB in the beginning and 104.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.07 ms. Allocated memory is still 138.4 MB. Free memory was 85.4 MB in the beginning and 76.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.70 ms. Allocated memory is still 138.4 MB. Free memory was 76.4 MB in the beginning and 75.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.02 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 75.1 MB in the beginning and 167.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1222.29 ms. Allocated memory is still 199.2 MB. Free memory was 166.6 MB in the beginning and 97.4 MB in the end (delta: 69.3 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) VAL [id(input)=2, input=2] [L13] int result = id(input); [L14] COND TRUE result == 2 VAL [input=2, result=2] [L15] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. UNSAFE Result, 1.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 54 SDtfs, 13 SDslu, 185 SDs, 0 SdLazy, 88 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2273 SizeOfPredicates, 2 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...