java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:47:21,743 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:47:21,746 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:47:21,759 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:47:21,759 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:47:21,760 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:47:21,761 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:47:21,763 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:47:21,765 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:47:21,765 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:47:21,766 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:47:21,767 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:47:21,768 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:47:21,770 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:47:21,771 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:47:21,772 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:47:21,773 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:47:21,775 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:47:21,776 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:47:21,778 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:47:21,779 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:47:21,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:47:21,783 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:47:21,797 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 15:47:21,828 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:47:21,829 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:47:21,829 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:47:21,830 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:47:21,831 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:47:21,831 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:47:21,831 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:47:21,833 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:47:21,833 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:47:21,833 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:47:21,833 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:47:21,833 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:47:21,834 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:47:21,834 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:47:21,834 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:47:21,834 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:47:21,834 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:47:21,835 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:47:21,835 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:47:21,835 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:47:21,835 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:47:21,835 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:47:21,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:47:21,837 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:47:21,837 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:47:21,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:47:21,838 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:47:21,838 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:47:21,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:47:21,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:47:21,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:47:21,931 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:47:21,932 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:47:21,932 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/id_build_true-unreach-call_true-termination.i [2018-10-22 15:47:22,000 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/69d8e6475/1e89c34efe6c43ccaa7fd1e0b31ce3bf/FLAGb5758afba [2018-10-22 15:47:22,476 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:47:22,476 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build_true-unreach-call_true-termination.i [2018-10-22 15:47:22,482 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/69d8e6475/1e89c34efe6c43ccaa7fd1e0b31ce3bf/FLAGb5758afba [2018-10-22 15:47:22,498 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/69d8e6475/1e89c34efe6c43ccaa7fd1e0b31ce3bf [2018-10-22 15:47:22,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:47:22,508 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:47:22,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:47:22,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:47:22,513 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:47:22,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a243cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22, skipping insertion in model container [2018-10-22 15:47:22,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:47:22,548 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:47:22,732 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:47:22,737 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:47:22,758 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:47:22,777 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:47:22,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22 WrapperNode [2018-10-22 15:47:22,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:47:22,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:47:22,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:47:22,779 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:47:22,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:47:22,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:47:22,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:47:22,816 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:47:22,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (1/1) ... [2018-10-22 15:47:22,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:47:22,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:47:22,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:47:22,847 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:47:22,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (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 15:47:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:47:23,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:47:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:47:23,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:47:23,249 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:47:23,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:47:23 BoogieIcfgContainer [2018-10-22 15:47:23,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:47:23,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:47:23,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:47:23,254 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:47:23,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:47:22" (1/3) ... [2018-10-22 15:47:23,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5673cc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:47:23, skipping insertion in model container [2018-10-22 15:47:23,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:47:22" (2/3) ... [2018-10-22 15:47:23,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5673cc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:47:23, skipping insertion in model container [2018-10-22 15:47:23,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:47:23" (3/3) ... [2018-10-22 15:47:23,259 INFO L112 eAbstractionObserver]: Analyzing ICFG id_build_true-unreach-call_true-termination.i [2018-10-22 15:47:23,269 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:47:23,276 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:47:23,290 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:47:23,320 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:47:23,321 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:47:23,321 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:47:23,321 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:47:23,321 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:47:23,321 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:47:23,322 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:47:23,322 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:47:23,322 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:47:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-22 15:47:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:47:23,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:23,347 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:23,350 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:23,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1922983260, now seen corresponding path program 1 times [2018-10-22 15:47:23,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:23,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:23,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:23,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:23,679 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 15:47:23,682 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:47:23,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:47:23,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:47:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:47:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:47:23,700 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-10-22 15:47:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:23,861 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2018-10-22 15:47:23,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:47:23,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:47:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:23,870 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:47:23,870 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:47:23,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:47:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:47:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 15:47:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:47:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-22 15:47:23,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-10-22 15:47:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:23,911 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-22 15:47:23,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:47:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-22 15:47:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:47:23,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:23,913 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:23,914 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:23,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1658058335, now seen corresponding path program 1 times [2018-10-22 15:47:23,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:23,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:24,057 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 15:47:24,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:24,058 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 15:47:24,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:24,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:24,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:47:24,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2018-10-22 15:47:24,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:47:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:47:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:47:24,407 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-10-22 15:47:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:24,639 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2018-10-22 15:47:24,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:47:24,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-22 15:47:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:24,640 INFO L225 Difference]: With dead ends: 20 [2018-10-22 15:47:24,641 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:47:24,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:47:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:47:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:47:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:47:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:47:24,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-10-22 15:47:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:24,644 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:47:24,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:47:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:47:24,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:47:24,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:47:24,713 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:47:24,714 INFO L428 ceAbstractionStarter]: At program point L19(lines 10 20) the Hoare annotation is: true [2018-10-22 15:47:24,714 INFO L421 ceAbstractionStarter]: At program point L15(line 15) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~nlen~0)) [2018-10-22 15:47:24,714 INFO L421 ceAbstractionStarter]: At program point L15-1(line 15) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~nlen~0)) [2018-10-22 15:47:24,714 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:47:24,715 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:47:24,715 INFO L421 ceAbstractionStarter]: At program point L13-4(lines 13 18) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~i~0) [2018-10-22 15:47:24,715 INFO L425 ceAbstractionStarter]: For program point L13-5(lines 13 18) no Hoare annotation was computed. [2018-10-22 15:47:24,715 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-22 15:47:24,716 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-22 15:47:24,716 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:47:24,716 INFO L425 ceAbstractionStarter]: For program point L16(lines 14 17) no Hoare annotation was computed. [2018-10-22 15:47:24,716 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 17) no Hoare annotation was computed. [2018-10-22 15:47:24,717 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~nlen~0)) [2018-10-22 15:47:24,717 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 15:47:24,717 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:47:24,717 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:47:24,717 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:47:24,718 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:47:24,718 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:47:24,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:47:24 BoogieIcfgContainer [2018-10-22 15:47:24,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:47:24,732 INFO L168 Benchmark]: Toolchain (without parser) took 2224.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -757.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:47:24,735 INFO L168 Benchmark]: CDTParser took 0.22 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 15:47:24,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.04 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 15:47:24,737 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.67 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 15:47:24,737 INFO L168 Benchmark]: Boogie Preprocessor took 24.50 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 15:47:24,738 INFO L168 Benchmark]: RCFGBuilder took 409.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -822.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:47:24,739 INFO L168 Benchmark]: TraceAbstraction took 1480.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2018-10-22 15:47:24,745 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 269.04 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 36.67 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 24.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 409.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -822.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1480.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 <= i && i < nlen - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 <= i - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 21 SDslu, 72 SDs, 0 SdLazy, 42 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 9 PreInvPairs, 14 NumberOfFragments, 26 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 1319 SizeOfPredicates, 2 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 3/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...