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/loops/array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:02,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:02,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:02,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:02,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:02,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:02,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:02,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:02,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:02,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:02,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:02,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:02,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:02,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:02,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:02,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:02,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:02,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:02,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:02,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:02,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:02,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:02,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:02,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:02,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:02,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:02,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:02,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:02,762 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 [2019-09-20 13:25:02,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:02,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:02,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:02,792 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:02,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:02,793 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:02,793 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:02,793 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:02,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:02,793 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:02,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:02,796 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:02,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:02,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:02,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:02,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:02,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:02,797 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:02,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:02,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:02,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:02,799 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:02,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:02,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:02,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:02,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:02,800 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:02,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:02,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:02,800 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:02,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:02,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:02,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:02,866 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:02,867 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:02,868 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-1.c [2019-09-20 13:25:02,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad38cec8c/3d89c6e7005344a8b26bf9ddec0b0294/FLAG9f812a154 [2019-09-20 13:25:03,354 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:03,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-1.c [2019-09-20 13:25:03,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad38cec8c/3d89c6e7005344a8b26bf9ddec0b0294/FLAG9f812a154 [2019-09-20 13:25:03,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad38cec8c/3d89c6e7005344a8b26bf9ddec0b0294 [2019-09-20 13:25:03,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:03,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:03,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:03,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:03,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:03,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:03" (1/1) ... [2019-09-20 13:25:03,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ad8be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:03, skipping insertion in model container [2019-09-20 13:25:03,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:03" (1/1) ... [2019-09-20 13:25:03,814 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:03,833 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:04,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:04,039 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:04,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:04,173 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:04,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04 WrapperNode [2019-09-20 13:25:04,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:04,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:04,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:04,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:04,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:04,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:04,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:04,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:04,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (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 [2019-09-20 13:25:04,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:04,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:04,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:25:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:25:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:25:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:25:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:04,519 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:04,520 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:04,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:04 BoogieIcfgContainer [2019-09-20 13:25:04,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:04,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:04,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:04,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:04,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:03" (1/3) ... [2019-09-20 13:25:04,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46576e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:04, skipping insertion in model container [2019-09-20 13:25:04,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (2/3) ... [2019-09-20 13:25:04,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46576e71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:04, skipping insertion in model container [2019-09-20 13:25:04,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:04" (3/3) ... [2019-09-20 13:25:04,530 INFO L109 eAbstractionObserver]: Analyzing ICFG array-1.c [2019-09-20 13:25:04,541 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:04,550 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:04,568 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:04,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:04,602 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:04,602 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:04,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:04,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:04,602 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:04,603 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:04,603 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-20 13:25:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:25:04,631 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:04,632 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:04,635 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times [2019-09-20 13:25:04,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:04,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:04,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,692 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:04,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:04,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:04,790 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:04,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:04,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:04,808 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-20 13:25:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:04,826 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-20 13:25:04,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:04,828 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-20 13:25:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:04,839 INFO L225 Difference]: With dead ends: 22 [2019-09-20 13:25:04,839 INFO L226 Difference]: Without dead ends: 15 [2019-09-20 13:25:04,842 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 [2019-09-20 13:25:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-20 13:25:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-20 13:25:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 13:25:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-20 13:25:04,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-09-20 13:25:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:04,875 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-20 13:25:04,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-20 13:25:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:25:04,876 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:04,876 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:04,877 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times [2019-09-20 13:25:04,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:04,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:05,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:05,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:05,030 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:05,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:05,033 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2019-09-20 13:25:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:05,062 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2019-09-20 13:25:05,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:05,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-20 13:25:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:05,063 INFO L225 Difference]: With dead ends: 18 [2019-09-20 13:25:05,063 INFO L226 Difference]: Without dead ends: 18 [2019-09-20 13:25:05,064 INFO L636 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 [2019-09-20 13:25:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-20 13:25:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-09-20 13:25:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:25:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-20 13:25:05,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-09-20 13:25:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:05,069 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-20 13:25:05,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-20 13:25:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:25:05,070 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:05,070 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:05,070 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times [2019-09-20 13:25:05,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:05,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:05,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:05,447 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 20 [2019-09-20 13:25:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:05,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:05,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:05,623 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-20 13:25:05,625 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [16], [20], [24], [28], [31], [33], [39], [40], [41], [43] [2019-09-20 13:25:05,667 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:05,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:05,742 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:25:05,744 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 16 root evaluator evaluations with a maximum evaluation depth of 0. Performed 16 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 24 variables. [2019-09-20 13:25:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:05,748 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:25:05,781 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:25:05,781 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:25:05,783 INFO L420 sIntCurrentIteration]: We unified 14 AI predicates to 14 [2019-09-20 13:25:05,784 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:25:05,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:25:05,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2019-09-20 13:25:05,785 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:05,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:05,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:05,786 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 2 states. [2019-09-20 13:25:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:05,787 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:25:05,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:05,788 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-20 13:25:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:05,788 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:25:05,788 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:05,789 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:05,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-20 13:25:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:05,791 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:05,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:05,791 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:05,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:05 BoogieIcfgContainer [2019-09-20 13:25:05,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:05,799 INFO L168 Benchmark]: Toolchain (without parser) took 2001.50 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 88.8 MB in the beginning and 82.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 64.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,800 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.77 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 88.5 MB in the beginning and 179.2 MB in the end (delta: -90.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,813 INFO L168 Benchmark]: Boogie Preprocessor took 37.64 ms. Allocated memory is still 199.8 MB. Free memory was 179.2 MB in the beginning and 176.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,814 INFO L168 Benchmark]: RCFGBuilder took 309.17 ms. Allocated memory is still 199.8 MB. Free memory was 176.0 MB in the beginning and 162.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,815 INFO L168 Benchmark]: TraceAbstraction took 1274.36 ms. Allocated memory is still 199.8 MB. Free memory was 161.6 MB in the beginning and 82.3 MB in the end (delta: 79.3 MB). Peak memory consumption was 79.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,819 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 375.77 ms. Allocated memory was 141.6 MB in the beginning and 199.8 MB in the end (delta: 58.2 MB). Free memory was 88.5 MB in the beginning and 179.2 MB in the end (delta: -90.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.64 ms. Allocated memory is still 199.8 MB. Free memory was 179.2 MB in the beginning and 176.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.17 ms. Allocated memory is still 199.8 MB. Free memory was 176.0 MB in the beginning and 162.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1274.36 ms. Allocated memory is still 199.8 MB. Free memory was 161.6 MB in the beginning and 82.3 MB in the end (delta: 79.3 MB). Peak memory consumption was 79.3 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 3 SDslu, 11 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 0.8928571428571429 AbsIntWeakeningRatio, 1.0 AbsIntAvgWeakeningVarsNumRemoved, 0.42857142857142855 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1651 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...