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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:29:54,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:29:54,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:29:54,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 16:29:54,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:29:54,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:29:54,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:29:54,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:29:54,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:29:54,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:29:54,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:29:54,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:29:54,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:29:54,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:29:54,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:29:54,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:29:54,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:29:54,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:29:54,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:29:54,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:29:54,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:29:54,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:29:54,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:29:54,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:29:54,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:29:54,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:29:54,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:29:54,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:29:54,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:29:54,335 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:29:54,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:29:54,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:29:54,336 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:29:54,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:29:54,337 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:29:54,338 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:29:54,338 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:29:54,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:29:54,339 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:29:54,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:29:54,340 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:29:54,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:29:54,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:29:54,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:29:54,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:29:54,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:29:54,342 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:29:54,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:29:54,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:29:54,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:29:54,343 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:29:54,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:29:54,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:29:54,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:29:54,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:29:54,344 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:29:54,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:29:54,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:29:54,344 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:29:54,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:29:54,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:29:54,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:29:54,395 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:29:54,396 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:29:54,396 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-02 16:29:54,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13ae874e/c759357fc45b4b07a3140a6eeedbcd30/FLAG529988650 [2019-10-02 16:29:54,924 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:29:54,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-02 16:29:54,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13ae874e/c759357fc45b4b07a3140a6eeedbcd30/FLAG529988650 [2019-10-02 16:29:55,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13ae874e/c759357fc45b4b07a3140a6eeedbcd30 [2019-10-02 16:29:55,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:29:55,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:29:55,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:55,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:29:55,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:29:55,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@999c6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55, skipping insertion in model container [2019-10-02 16:29:55,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,306 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:29:55,326 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:29:55,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:55,523 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:29:55,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:55,709 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:29:55,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55 WrapperNode [2019-10-02 16:29:55,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:55,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:29:55,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:29:55,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:29:55,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (1/1) ... [2019-10-02 16:29:55,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:29:55,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:29:55,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:29:55,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:29:55,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (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 16:29:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:29:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:29:55,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 16:29:55,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:29:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:29:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 16:29:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:29:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:29:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 16:29:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 16:29:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 16:29:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 16:29:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:29:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:29:56,411 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:29:56,412 INFO L283 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-02 16:29:56,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:56 BoogieIcfgContainer [2019-10-02 16:29:56,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:29:56,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:29:56,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:29:56,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:29:56,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:29:55" (1/3) ... [2019-10-02 16:29:56,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7945de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:56, skipping insertion in model container [2019-10-02 16:29:56,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:55" (2/3) ... [2019-10-02 16:29:56,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7945de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:56, skipping insertion in model container [2019-10-02 16:29:56,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:56" (3/3) ... [2019-10-02 16:29:56,424 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-10-02 16:29:56,432 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:29:56,440 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:29:56,458 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:29:56,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:29:56,491 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:29:56,491 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:29:56,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:29:56,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:29:56,491 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:29:56,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:29:56,492 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:29:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-10-02 16:29:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 16:29:56,522 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:56,523 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:56,525 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-10-02 16:29:56,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:56,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,589 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:56,749 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 16:29:56,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:56,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 16:29:56,752 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:56,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:29:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:29:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:56,771 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2019-10-02 16:29:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:56,787 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-10-02 16:29:56,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:29:56,789 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-10-02 16:29:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:56,797 INFO L225 Difference]: With dead ends: 48 [2019-10-02 16:29:56,797 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 16:29:56,799 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 16:29:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-02 16:29:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-02 16:29:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-02 16:29:56,839 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-10-02 16:29:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:56,840 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-02 16:29:56,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:29:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-02 16:29:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 16:29:56,841 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:56,842 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:56,842 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-10-02 16:29:56,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:56,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:56,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,846 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:56,914 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 16:29:56,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:56,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:29:56,915 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:56,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:56,918 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2019-10-02 16:29:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:56,951 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-10-02 16:29:56,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:56,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-02 16:29:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:56,953 INFO L225 Difference]: With dead ends: 45 [2019-10-02 16:29:56,953 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 16:29:56,954 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 16:29:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-02 16:29:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 16:29:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-02 16:29:56,961 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-10-02 16:29:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:56,962 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-02 16:29:56,962 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-02 16:29:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-02 16:29:56,963 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:56,964 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:56,964 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-10-02 16:29:56,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:56,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:56,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:56,967 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 16:29:57,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:57,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:29:57,043 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:57,044 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:57,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:57,048 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 3 states. [2019-10-02 16:29:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:57,202 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-10-02 16:29:57,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:57,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-02 16:29:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:57,204 INFO L225 Difference]: With dead ends: 60 [2019-10-02 16:29:57,205 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 16:29:57,205 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 16:29:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-10-02 16:29:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-02 16:29:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-02 16:29:57,212 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-10-02 16:29:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:57,213 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-02 16:29:57,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-02 16:29:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 16:29:57,215 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:57,215 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:57,215 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-10-02 16:29:57,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:57,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:57,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:57,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:57,218 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-02 16:29:57,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:29:57,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:29:57,382 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 48 with the following transitions: [2019-10-02 16:29:57,384 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [25], [27], [29], [33], [39], [41], [43], [47], [53], [55], [57], [61], [67], [69], [71], [75], [81], [83], [85], [89], [95], [97], [99], [103], [109], [111], [113], [117], [123], [125], [127], [131], [139], [149], [152], [154], [160], [161], [162], [164] [2019-10-02 16:29:57,423 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:29:57,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 16:29:57,489 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 16:29:57,491 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 53 variables. [2019-10-02 16:29:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:57,496 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 16:29:57,544 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-02 16:29:57,544 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 16:29:57,547 INFO L420 sIntCurrentIteration]: We unified 46 AI predicates to 46 [2019-10-02 16:29:57,547 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 16:29:57,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 16:29:57,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-10-02 16:29:57,549 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:57,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:29:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:29:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:57,550 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 2 states. [2019-10-02 16:29:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:57,551 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-10-02 16:29:57,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:29:57,551 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 47 [2019-10-02 16:29:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:57,552 INFO L225 Difference]: With dead ends: 6 [2019-10-02 16:29:57,552 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 16:29:57,553 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 16:29:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 16:29:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 16:29:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 16:29:57,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2019-10-02 16:29:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:57,554 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 16:29:57,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:29:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 16:29:57,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 16:29:57,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 04:29:57 BoogieIcfgContainer [2019-10-02 16:29:57,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 16:29:57,564 INFO L168 Benchmark]: Toolchain (without parser) took 2273.36 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 87.1 MB in the beginning and 86.3 MB in the end (delta: 774.6 kB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,565 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.13 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 86.9 MB in the beginning and 176.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,567 INFO L168 Benchmark]: Boogie Preprocessor took 105.62 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 174.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,568 INFO L168 Benchmark]: RCFGBuilder took 597.13 ms. Allocated memory is still 199.2 MB. Free memory was 174.2 MB in the beginning and 151.3 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,569 INFO L168 Benchmark]: TraceAbstraction took 1144.83 ms. Allocated memory is still 199.2 MB. Free memory was 150.7 MB in the beginning and 86.3 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:57,573 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 421.13 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 86.9 MB in the beginning and 176.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.62 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 174.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.13 ms. Allocated memory is still 199.2 MB. Free memory was 174.2 MB in the beginning and 151.3 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1144.83 ms. Allocated memory is still 199.2 MB. Free memory was 150.7 MB in the beginning and 86.3 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 48 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 148 SDtfs, 9 SDslu, 68 SDs, 0 SdLazy, 45 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.8967391304347826 AbsIntWeakeningRatio, 1.108695652173913 AbsIntAvgWeakeningVarsNumRemoved, 0.13043478260869565 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 4976 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 9/10 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...