java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:30:08,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:30:08,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:30:08,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 16:30:08,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 16:30:08,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 16:30:08,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 16:30:08,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 16:30:08,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 16:30:08,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 16:30:08,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 16:30:08,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 16:30:08,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:30:08,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:30:08,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:30:08,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:30:08,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:30:08,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:30:08,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:30:08,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:30:08,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:30:08,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:30:08,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:30:08,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:30:08,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:30:08,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:30:08,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:30:08,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:30:08,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:30:08,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:30:08,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:30:08,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:30:08,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:30:08,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:30:08,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:30:08,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:30:08,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:30:08,631 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:30:08,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:30:08,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:30:08,632 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:30:08,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:30:08,633 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:30:08,633 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:30:08,633 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:30:08,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:30:08,634 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:30:08,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:30:08,635 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:30:08,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:30:08,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:30:08,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:30:08,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:30:08,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:30:08,636 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:30:08,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:30:08,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:30:08,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:30:08,637 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:30:08,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:30:08,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:08,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:30:08,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:30:08,638 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:30:08,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:30:08,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:30:08,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:30:08,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:30:08,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:30:08,682 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:30:08,683 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:30:08,683 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:30:08,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-10-02 16:30:08,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197a43d0a/592ab6223f6341819ce6bdb218cac831/FLAGecbf99c2c [2019-10-02 16:30:09,150 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:30:09,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2019-10-02 16:30:09,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197a43d0a/592ab6223f6341819ce6bdb218cac831/FLAGecbf99c2c [2019-10-02 16:30:09,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197a43d0a/592ab6223f6341819ce6bdb218cac831 [2019-10-02 16:30:09,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:30:09,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:30:09,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:09,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:30:09,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:30:09,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63923cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09, skipping insertion in model container [2019-10-02 16:30:09,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,597 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:30:09,613 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:30:09,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:09,830 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:30:09,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:09,871 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:30:09,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09 WrapperNode [2019-10-02 16:30:09,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:09,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:30:09,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:30:09,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:30:09,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:09,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:10,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... [2019-10-02 16:30:10,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:30:10,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:30:10,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:30:10,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:30:10,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:10,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:30:10,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:30:10,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 16:30:10,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 16:30:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 16:30:10,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 16:30:10,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 16:30:10,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:30:10,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:30:10,296 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:30:10,296 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-02 16:30:10,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:10 BoogieIcfgContainer [2019-10-02 16:30:10,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:30:10,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:30:10,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:30:10,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:30:10,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:30:09" (1/3) ... [2019-10-02 16:30:10,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cce37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:10, skipping insertion in model container [2019-10-02 16:30:10,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:09" (2/3) ... [2019-10-02 16:30:10,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cce37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:10, skipping insertion in model container [2019-10-02 16:30:10,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:10" (3/3) ... [2019-10-02 16:30:10,326 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2019-10-02 16:30:10,349 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:30:10,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:30:10,398 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:30:10,427 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:30:10,427 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:30:10,427 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:30:10,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:30:10,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:30:10,428 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:30:10,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:30:10,428 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:30:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-02 16:30:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 16:30:10,449 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:10,450 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:10,452 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2019-10-02 16:30:10,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:10,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:10,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,508 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:10,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:10,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 16:30:10,583 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:10,587 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:30:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:30:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:30:10,600 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-02 16:30:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:10,615 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-02 16:30:10,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:30:10,616 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-02 16:30:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:10,624 INFO L225 Difference]: With dead ends: 27 [2019-10-02 16:30:10,624 INFO L226 Difference]: Without dead ends: 22 [2019-10-02 16:30:10,626 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:30:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-02 16:30:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-02 16:30:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-02 16:30:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-02 16:30:10,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-02 16:30:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:10,661 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-02 16:30:10,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:30:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-02 16:30:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 16:30:10,662 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:10,662 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:10,663 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2019-10-02 16:30:10,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,668 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:10,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:10,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:30:10,718 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:10,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:30:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:30:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:10,720 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2019-10-02 16:30:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:10,771 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-10-02 16:30:10,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:30:10,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-02 16:30:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:10,773 INFO L225 Difference]: With dead ends: 26 [2019-10-02 16:30:10,774 INFO L226 Difference]: Without dead ends: 26 [2019-10-02 16:30:10,775 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-02 16:30:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-02 16:30:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 16:30:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-02 16:30:10,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2019-10-02 16:30:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:10,780 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-02 16:30:10,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:30:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-02 16:30:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 16:30:10,781 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:10,781 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:30:10,781 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2019-10-02 16:30:10,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:10,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:10,785 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 16:30:10,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:30:10,859 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:30:10,860 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-10-02 16:30:10,862 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [25], [27], [29], [33], [41], [51], [54], [56], [62], [63], [64], [66] [2019-10-02 16:30:10,893 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:30:10,894 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 16:30:10,951 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 16:30:10,953 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 16:30:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:10,957 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 16:30:10,991 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-02 16:30:10,992 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 16:30:10,993 INFO L420 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2019-10-02 16:30:10,993 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 16:30:10,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 16:30:10,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-10-02 16:30:10,995 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:10,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:30:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:30:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:30:10,996 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 2 states. [2019-10-02 16:30:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:10,997 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-10-02 16:30:10,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:30:10,997 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-02 16:30:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:10,998 INFO L225 Difference]: With dead ends: 6 [2019-10-02 16:30:10,998 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 16:30:10,998 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:30:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 16:30:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 16:30:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 16:30:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 16:30:11,000 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-10-02 16:30:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:11,000 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 16:30:11,000 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:30:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 16:30:11,001 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 16:30:11,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 04:30:11 BoogieIcfgContainer [2019-10-02 16:30:11,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 16:30:11,009 INFO L168 Benchmark]: Toolchain (without parser) took 1426.47 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 88.3 MB in the beginning and 120.8 MB in the end (delta: -32.5 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,010 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 136.3 MB. Free memory was 88.1 MB in the beginning and 78.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,012 INFO L168 Benchmark]: Boogie Preprocessor took 133.43 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 78.1 MB in the beginning and 176.6 MB in the end (delta: -98.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,013 INFO L168 Benchmark]: RCFGBuilder took 298.54 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 161.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,014 INFO L168 Benchmark]: TraceAbstraction took 697.00 ms. Allocated memory is still 199.8 MB. Free memory was 161.2 MB in the beginning and 120.8 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:30:11,018 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 136.3 MB. Free memory was 88.1 MB in the beginning and 78.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.43 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 78.1 MB in the beginning and 176.6 MB in the end (delta: -98.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 298.54 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 161.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 697.00 ms. Allocated memory is still 199.8 MB. Free memory was 161.2 MB in the beginning and 120.8 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 54 SDtfs, 2 SDslu, 16 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9305555555555556 AbsIntWeakeningRatio, 0.8888888888888888 AbsIntAvgWeakeningVarsNumRemoved, 0.3333333333333333 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 852 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...