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/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:29:43,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:29:43,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:29:43,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 16:29:43,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 16:29:43,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 16:29:43,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 16:29:43,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 16:29:43,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 16:29:43,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 16:29:43,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 16:29:43,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 16:29:43,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:29:43,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:29:43,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:29:43,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:29:43,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:29:43,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:29:43,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:29:43,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:29:43,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:29:43,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:29:43,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:29:43,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:29:43,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:29:43,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:29:43,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:29:43,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:29:43,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:29:43,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:29:43,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:29:43,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:29:43,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:29:43,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:29:43,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:29:43,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:29:43,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 16:29:43,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:29:43,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:29:43,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:29:43,540 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:29:43,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:29:43,540 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:29:43,541 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:29:43,541 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:29:43,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:29:43,541 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:29:43,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:29:43,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:29:43,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:29:43,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:29:43,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:29:43,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:29:43,544 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:29:43,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:29:43,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:29:43,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:29:43,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:29:43,545 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:29:43,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:29:43,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:29:43,546 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:29:43,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:29:43,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:29:43,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:29:43,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:29:43,591 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:29:43,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-02 16:29:43,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542b104a6/7f582200d3de4a2b91de78eff36120a8/FLAG7016b2a5f [2019-10-02 16:29:44,052 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:29:44,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-02 16:29:44,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542b104a6/7f582200d3de4a2b91de78eff36120a8/FLAG7016b2a5f [2019-10-02 16:29:44,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542b104a6/7f582200d3de4a2b91de78eff36120a8 [2019-10-02 16:29:44,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:29:44,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:29:44,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:44,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:29:44,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:29:44,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a870e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44, skipping insertion in model container [2019-10-02 16:29:44,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,505 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:29:44,526 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:29:44,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:44,761 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:29:44,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:29:44,805 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:29:44,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44 WrapperNode [2019-10-02 16:29:44,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:29:44,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:29:44,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:29:44,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:29:44,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... [2019-10-02 16:29:44,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:29:44,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:29:44,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:29:44,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:29:44,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:29:45,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:29:45,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:29:45,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 16:29:45,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 16:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:29:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:29:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 16:29:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 16:29:45,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 16:29:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 16:29:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:29:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:29:45,452 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:29:45,452 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-02 16:29:45,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:45 BoogieIcfgContainer [2019-10-02 16:29:45,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:29:45,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:29:45,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:29:45,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:29:45,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:29:44" (1/3) ... [2019-10-02 16:29:45,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29432b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:45, skipping insertion in model container [2019-10-02 16:29:45,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:29:44" (2/3) ... [2019-10-02 16:29:45,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29432b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:29:45, skipping insertion in model container [2019-10-02 16:29:45,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:29:45" (3/3) ... [2019-10-02 16:29:45,462 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2019-10-02 16:29:45,472 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:29:45,480 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:29:45,498 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:29:45,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:29:45,530 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:29:45,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:29:45,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:29:45,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:29:45,530 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:29:45,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:29:45,531 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:29:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-02 16:29:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 16:29:45,555 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,556 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:45,558 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1606204250, now seen corresponding path program 1 times [2019-10-02 16:29:45,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:29:45,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 16:29:45,708 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:29:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:29:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:45,726 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-02 16:29:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:45,747 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-10-02 16:29:45,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:29:45,748 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-02 16:29:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:45,758 INFO L225 Difference]: With dead ends: 37 [2019-10-02 16:29:45,758 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 16:29:45,760 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 16:29:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 16:29:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 16:29:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-02 16:29:45,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-02 16:29:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:45,809 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-02 16:29:45,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:29:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-02 16:29:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 16:29:45,811 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,811 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:45,812 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -729587696, now seen corresponding path program 1 times [2019-10-02 16:29:45,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:29:45,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:45,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:29:45,881 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:45,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:45,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:45,884 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 3 states. [2019-10-02 16:29:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:45,934 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-02 16:29:45,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:45,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-02 16:29:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:45,936 INFO L225 Difference]: With dead ends: 34 [2019-10-02 16:29:45,936 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 16:29:45,937 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 16:29:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-02 16:29:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 16:29:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-10-02 16:29:45,945 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2019-10-02 16:29:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:45,945 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-10-02 16:29:45,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-10-02 16:29:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 16:29:45,947 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:45,947 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 16:29:45,947 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash 617787630, now seen corresponding path program 1 times [2019-10-02 16:29:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:45,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:45,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:45,950 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-02 16:29:46,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:29:46,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:29:46,018 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:46,019 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:29:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:29:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:46,020 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2019-10-02 16:29:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:46,073 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-02 16:29:46,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:29:46,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-02 16:29:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:46,076 INFO L225 Difference]: With dead ends: 38 [2019-10-02 16:29:46,076 INFO L226 Difference]: Without dead ends: 38 [2019-10-02 16:29:46,076 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:29:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-02 16:29:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-02 16:29:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-02 16:29:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-10-02 16:29:46,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2019-10-02 16:29:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:46,083 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-10-02 16:29:46,083 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:29:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-10-02 16:29:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 16:29:46,084 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:29:46,085 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:29:46,085 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:29:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1226217789, now seen corresponding path program 1 times [2019-10-02 16:29:46,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:29:46,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:46,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:29:46,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:29:46,088 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:29:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:29:46,144 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 16:29:46,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:29:46,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:29:46,146 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-10-02 16:29:46,149 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [22], [26], [32], [34], [37], [46], [50], [58], [90], [93], [95], [101], [102], [103], [105] [2019-10-02 16:29:46,185 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:29:46,186 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 16:29:46,273 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 16:29:46,277 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 27 variables. [2019-10-02 16:29:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:29:46,280 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 16:29:46,314 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-02 16:29:46,314 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 16:29:46,316 INFO L420 sIntCurrentIteration]: We unified 21 AI predicates to 21 [2019-10-02 16:29:46,316 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 16:29:46,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 16:29:46,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-10-02 16:29:46,317 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:29:46,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 16:29:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 16:29:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:46,318 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 2 states. [2019-10-02 16:29:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:29:46,319 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-10-02 16:29:46,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 16:29:46,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-10-02 16:29:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:29:46,320 INFO L225 Difference]: With dead ends: 6 [2019-10-02 16:29:46,320 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 16:29:46,320 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 16:29:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 16:29:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 16:29:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 16:29:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 16:29:46,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-10-02 16:29:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:29:46,322 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 16:29:46,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 16:29:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 16:29:46,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 16:29:46,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 04:29:46 BoogieIcfgContainer [2019-10-02 16:29:46,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 16:29:46,330 INFO L168 Benchmark]: Toolchain (without parser) took 1840.12 ms. Allocated memory was 132.6 MB in the beginning and 200.3 MB in the end (delta: 67.6 MB). Free memory was 86.9 MB in the beginning and 109.0 MB in the end (delta: -22.0 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,331 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 132.6 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-02 16:29:46,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.15 ms. Allocated memory is still 132.6 MB. Free memory was 86.5 MB in the beginning and 76.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,333 INFO L168 Benchmark]: Boogie Preprocessor took 151.95 ms. Allocated memory was 132.6 MB in the beginning and 200.3 MB in the end (delta: 67.6 MB). Free memory was 76.3 MB in the beginning and 175.9 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,334 INFO L168 Benchmark]: RCFGBuilder took 495.06 ms. Allocated memory is still 200.3 MB. Free memory was 175.9 MB in the beginning and 157.4 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,335 INFO L168 Benchmark]: TraceAbstraction took 872.66 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 109.0 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2019-10-02 16:29:46,339 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 132.6 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.15 ms. Allocated memory is still 132.6 MB. Free memory was 86.5 MB in the beginning and 76.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.95 ms. Allocated memory was 132.6 MB in the beginning and 200.3 MB in the end (delta: 67.6 MB). Free memory was 76.3 MB in the beginning and 175.9 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.06 ms. Allocated memory is still 200.3 MB. Free memory was 175.9 MB in the beginning and 157.4 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 872.66 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 109.0 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 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, 37 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 7 SDslu, 58 SDs, 0 SdLazy, 28 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 0.9285714285714286 AbsIntWeakeningRatio, 1.0952380952380953 AbsIntAvgWeakeningVarsNumRemoved, 0.2857142857142857 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 1513 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...