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/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:11:24,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:11:24,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:11:24,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:11:24,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:11:24,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:11:24,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:11:24,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:11:24,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:11:24,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:11:24,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:11:24,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:11:24,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:11:24,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:11:24,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:11:24,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:11:24,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:11:24,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:11:24,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:11:24,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:11:24,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:11:24,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:11:24,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:11:24,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:11:24,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:11:24,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:11:24,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:11:24,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:11:24,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:11:24,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:11:24,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:11:24,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:11:24,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:11:24,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:11:24,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:11:24,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:11:24,704 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 [2019-09-16 16:11:24,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:11:24,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:11:24,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:11:24,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:11:24,721 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:11:24,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:11:24,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:11:24,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:11:24,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:11:24,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:11:24,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:11:24,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:11:24,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:11:24,723 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:11:24,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:11:24,723 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:11:24,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:11:24,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:11:24,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:11:24,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:11:24,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:11:24,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:11:24,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:11:24,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:11:24,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:11:24,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:11:24,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:11:24,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:11:24,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:11:24,755 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:11:24,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:11:24,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:11:24,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:11:24,774 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:11:24,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2019-09-16 16:11:24,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571394c67/b72f67129477444aba755b0e9489f025/FLAG44273b8a9 [2019-09-16 16:11:25,341 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:11:25,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2019-09-16 16:11:25,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571394c67/b72f67129477444aba755b0e9489f025/FLAG44273b8a9 [2019-09-16 16:11:25,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/571394c67/b72f67129477444aba755b0e9489f025 [2019-09-16 16:11:25,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:11:25,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:11:25,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:25,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:11:25,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:11:25,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:25,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d63c82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25, skipping insertion in model container [2019-09-16 16:11:25,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:25,724 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:11:25,741 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:11:25,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:25,934 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:11:25,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:25,960 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:11:25,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25 WrapperNode [2019-09-16 16:11:25,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:25,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:11:25,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:11:25,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:11:26,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:11:26,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:11:26,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:11:26,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:11:26,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (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 [2019-09-16 16:11:26,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:11:26,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:11:26,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:11:26,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:11:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:11:26,330 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:11:26,330 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 16:11:26,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:26 BoogieIcfgContainer [2019-09-16 16:11:26,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:11:26,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:11:26,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:11:26,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:11:26,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:11:25" (1/3) ... [2019-09-16 16:11:26,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2061b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:26, skipping insertion in model container [2019-09-16 16:11:26,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (2/3) ... [2019-09-16 16:11:26,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2061b776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:26, skipping insertion in model container [2019-09-16 16:11:26,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:26" (3/3) ... [2019-09-16 16:11:26,339 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2019-09-16 16:11:26,350 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:11:26,357 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:11:26,374 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:11:26,402 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:11:26,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:11:26,403 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:11:26,403 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:11:26,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:11:26,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:11:26,404 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:11:26,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:11:26,404 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:11:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-16 16:11:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:26,423 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:26,424 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:26,426 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-09-16 16:11:26,434 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:26,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:26,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:26,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:26,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:26,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:11:26,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:11:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:11:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:26,562 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-16 16:11:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:26,583 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-16 16:11:26,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:11:26,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-16 16:11:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:26,591 INFO L225 Difference]: With dead ends: 32 [2019-09-16 16:11:26,591 INFO L226 Difference]: Without dead ends: 13 [2019-09-16 16:11:26,594 INFO L636 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 [2019-09-16 16:11:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-16 16:11:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-16 16:11:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-16 16:11:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-16 16:11:26,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-16 16:11:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:26,630 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-16 16:11:26,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:11:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-16 16:11:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:26,631 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:26,632 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:26,632 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2019-09-16 16:11:26,633 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:26,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:26,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:26,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:26,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:26,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:11:26,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:11:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:11:26,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:26,837 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-16 16:11:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:26,910 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-16 16:11:26,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:26,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-16 16:11:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:26,912 INFO L225 Difference]: With dead ends: 27 [2019-09-16 16:11:26,912 INFO L226 Difference]: Without dead ends: 16 [2019-09-16 16:11:26,913 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-16 16:11:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-16 16:11:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-16 16:11:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-16 16:11:26,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-16 16:11:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:26,919 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-16 16:11:26,919 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:11:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-16 16:11:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 16:11:26,920 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:26,920 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:26,920 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2019-09-16 16:11:26,921 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:26,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:26,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:27,048 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:27,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:11:27,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:27,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:27,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-09-16 16:11:27,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-16 16:11:27,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-16 16:11:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-16 16:11:27,193 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2019-09-16 16:11:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:27,287 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-16 16:11:27,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:11:27,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-09-16 16:11:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:27,289 INFO L225 Difference]: With dead ends: 30 [2019-09-16 16:11:27,289 INFO L226 Difference]: Without dead ends: 19 [2019-09-16 16:11:27,290 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-16 16:11:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-16 16:11:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-16 16:11:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-16 16:11:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-16 16:11:27,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-16 16:11:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:27,296 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-16 16:11:27,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-16 16:11:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-16 16:11:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:11:27,297 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:27,297 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:27,298 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2019-09-16 16:11:27,298 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:27,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:27,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:27,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:27,437 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 16:11:27,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:27,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:27,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:27,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-16 16:11:27,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:27,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:27,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-09-16 16:11:27,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-16 16:11:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-16 16:11:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-16 16:11:27,543 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-09-16 16:11:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:27,661 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-09-16 16:11:27,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:11:27,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-16 16:11:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:27,664 INFO L225 Difference]: With dead ends: 36 [2019-09-16 16:11:27,665 INFO L226 Difference]: Without dead ends: 22 [2019-09-16 16:11:27,666 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-16 16:11:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-16 16:11:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-16 16:11:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-16 16:11:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-16 16:11:27,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-16 16:11:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:27,679 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-16 16:11:27,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-16 16:11:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-16 16:11:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-16 16:11:27,680 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:27,681 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:27,681 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2019-09-16 16:11:27,683 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:27,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:27,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:27,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:27,875 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:27,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:11:27,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-16 16:11:27,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:27,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:11:27,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:27,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:28,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:28,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-09-16 16:11:28,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-16 16:11:28,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-16 16:11:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-16 16:11:28,016 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2019-09-16 16:11:28,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:28,114 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-16 16:11:28,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 16:11:28,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-09-16 16:11:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:28,116 INFO L225 Difference]: With dead ends: 42 [2019-09-16 16:11:28,116 INFO L226 Difference]: Without dead ends: 25 [2019-09-16 16:11:28,116 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:11:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-16 16:11:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-16 16:11:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:11:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-16 16:11:28,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2019-09-16 16:11:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:28,122 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-16 16:11:28,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-16 16:11:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-16 16:11:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:11:28,123 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:28,124 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:28,124 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash 92873718, now seen corresponding path program 4 times [2019-09-16 16:11:28,124 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:28,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:28,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:28,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:28,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:28,264 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:28,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:11:28,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:11:28,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:28,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-16 16:11:28,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:28,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:28,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:28,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2019-09-16 16:11:28,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 16:11:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 16:11:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:11:28,367 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2019-09-16 16:11:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:28,489 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-09-16 16:11:28,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-16 16:11:28,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-09-16 16:11:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:28,490 INFO L225 Difference]: With dead ends: 39 [2019-09-16 16:11:28,491 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 16:11:28,492 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-16 16:11:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 16:11:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 16:11:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 16:11:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 16:11:28,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-09-16 16:11:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:28,493 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 16:11:28,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 16:11:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 16:11:28,493 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 16:11:28,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-16 16:11:28,623 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-16 16:11:28,623 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-16 16:11:28,623 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-16 16:11:28,623 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-16 16:11:28,624 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-16 16:11:28,624 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-16 16:11:28,624 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2019-09-16 16:11:28,624 INFO L443 ceAbstractionStarter]: For program point L28(line 28) no Hoare annotation was computed. [2019-09-16 16:11:28,624 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2019-09-16 16:11:28,625 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 22) no Hoare annotation was computed. [2019-09-16 16:11:28,625 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2019-09-16 16:11:28,626 INFO L439 ceAbstractionStarter]: At program point L19-2(lines 19 27) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2019-09-16 16:11:28,626 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 27) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2019-09-16 16:11:28,627 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2019-09-16 16:11:28,627 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-09-16 16:11:28,627 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-09-16 16:11:28,627 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-09-16 16:11:28,627 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-16 16:11:28,627 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-09-16 16:11:28,628 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-09-16 16:11:28,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 04:11:28 BoogieIcfgContainer [2019-09-16 16:11:28,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 16:11:28,656 INFO L168 Benchmark]: Toolchain (without parser) took 2949.93 ms. Allocated memory was 135.8 MB in the beginning and 213.4 MB in the end (delta: 77.6 MB). Free memory was 83.1 MB in the beginning and 106.8 MB in the end (delta: -23.7 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,657 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 135.8 MB. Free memory was 101.9 MB in the beginning and 101.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.41 ms. Allocated memory is still 135.8 MB. Free memory was 82.9 MB in the beginning and 73.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,661 INFO L168 Benchmark]: Boogie Preprocessor took 129.09 ms. Allocated memory was 135.8 MB in the beginning and 197.7 MB in the end (delta: 61.9 MB). Free memory was 73.1 MB in the beginning and 174.4 MB in the end (delta: -101.3 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,662 INFO L168 Benchmark]: RCFGBuilder took 241.15 ms. Allocated memory is still 197.7 MB. Free memory was 174.4 MB in the beginning and 163.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,671 INFO L168 Benchmark]: TraceAbstraction took 2318.15 ms. Allocated memory was 197.7 MB in the beginning and 213.4 MB in the end (delta: 15.7 MB). Free memory was 163.3 MB in the beginning and 106.8 MB in the end (delta: 56.5 MB). Peak memory consumption was 72.2 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:28,679 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 135.8 MB. Free memory was 101.9 MB in the beginning and 101.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.41 ms. Allocated memory is still 135.8 MB. Free memory was 82.9 MB in the beginning and 73.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.09 ms. Allocated memory was 135.8 MB in the beginning and 197.7 MB in the end (delta: 61.9 MB). Free memory was 73.1 MB in the beginning and 174.4 MB in the end (delta: -101.3 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.15 ms. Allocated memory is still 197.7 MB. Free memory was 174.4 MB in the beginning and 163.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2318.15 ms. Allocated memory was 197.7 MB in the beginning and 213.4 MB in the end (delta: 15.7 MB). Free memory was 163.3 MB in the beginning and 106.8 MB in the end (delta: 56.5 MB). Peak memory consumption was 72.2 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: 19]: Loop Invariant Derived loop invariant: ((((len <= 0 && 0 < len / 4294967296 + 1) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (1 <= len && len <= 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 2.2s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 39 SDslu, 331 SDs, 0 SdLazy, 261 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 85 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 11916 SizeOfPredicates, 8 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...