/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:36:16,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:36:16,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:36:16,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:36:16,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:36:16,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:36:16,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:36:16,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:36:16,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:36:16,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:36:16,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:36:16,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:36:16,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:36:16,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:36:16,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:36:16,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:36:16,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:36:16,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:36:16,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:36:16,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:36:16,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:36:16,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:36:16,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:36:16,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:36:16,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:36:16,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:36:16,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:36:16,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:36:16,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:36:16,669 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:36:16,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:36:16,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:36:16,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:36:16,672 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:36:16,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:36:16,673 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:36:16,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:36:16,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:36:16,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:36:16,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:36:16,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:36:16,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:36:16,675 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:36:16,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:36:16,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:36:16,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:36:16,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:36:16,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:36:16,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:36:16,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:36:16,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:36:16,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:36:16,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:36:16,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:36:16,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:36:16,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:36:16,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:36:16,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:36:16,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:36:17,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:36:17,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:36:17,008 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:36:17,009 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:36:17,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-11-07 00:36:17,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c36c257d/a7376a9b55b54f039e787c6de112854f/FLAGa1c9e39b6 [2019-11-07 00:36:17,549 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:36:17,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2019-11-07 00:36:17,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c36c257d/a7376a9b55b54f039e787c6de112854f/FLAGa1c9e39b6 [2019-11-07 00:36:17,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c36c257d/a7376a9b55b54f039e787c6de112854f [2019-11-07 00:36:17,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:36:17,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:36:17,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:17,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:36:18,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:36:18,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:17" (1/1) ... [2019-11-07 00:36:18,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677ed351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18, skipping insertion in model container [2019-11-07 00:36:18,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:17" (1/1) ... [2019-11-07 00:36:18,012 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:36:18,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:36:18,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:18,215 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:36:18,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:18,243 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:36:18,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18 WrapperNode [2019-11-07 00:36:18,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:18,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:36:18,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:36:18,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:36:18,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (1/1) ... [2019-11-07 00:36:18,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:36:18,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:36:18,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:36:18,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:36:18,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (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 [2019-11-07 00:36:18,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:36:18,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:36:18,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:36:18,411 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 00:36:18,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:36:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:36:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:36:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 00:36:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:36:18,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:36:18,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:36:18,538 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:36:18,538 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 00:36:18,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:18 BoogieIcfgContainer [2019-11-07 00:36:18,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:36:18,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:36:18,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:36:18,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:36:18,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:36:17" (1/3) ... [2019-11-07 00:36:18,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73159c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:18, skipping insertion in model container [2019-11-07 00:36:18,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:18" (2/3) ... [2019-11-07 00:36:18,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73159c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:18, skipping insertion in model container [2019-11-07 00:36:18,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:18" (3/3) ... [2019-11-07 00:36:18,547 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-11-07 00:36:18,557 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:36:18,565 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:36:18,577 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:36:18,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:36:18,619 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:36:18,620 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:36:18,620 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:36:18,620 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:36:18,620 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:36:18,621 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:36:18,623 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:36:18,671 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 00:36:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:36:18,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:18,680 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:18,682 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2019-11-07 00:36:18,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:18,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348150200] [2019-11-07 00:36:18,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:36:18,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348150200] [2019-11-07 00:36:18,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:36:18,802 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 00:36:18,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401126043] [2019-11-07 00:36:18,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:36:18,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:36:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:36:18,828 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-07 00:36:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:18,858 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2019-11-07 00:36:18,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:36:18,859 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 00:36:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:18,868 INFO L225 Difference]: With dead ends: 35 [2019-11-07 00:36:18,868 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 00:36:18,872 INFO L630 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 [2019-11-07 00:36:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 00:36:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 00:36:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 00:36:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-07 00:36:18,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2019-11-07 00:36:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:18,910 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-07 00:36:18,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:36:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-07 00:36:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 00:36:18,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:18,911 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:18,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2019-11-07 00:36:18,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:18,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560032339] [2019-11-07 00:36:18,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:18,961 INFO L172 FreeRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-11-07 00:36:18,962 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-07 00:36:18,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:36:18 BoogieIcfgContainer [2019-11-07 00:36:18,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:36:18,987 INFO L168 Benchmark]: Toolchain (without parser) took 992.73 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 103.1 MB in the beginning and 148.3 MB in the end (delta: -45.2 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,988 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.58 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,990 INFO L168 Benchmark]: Boogie Preprocessor took 111.09 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 180.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,991 INFO L168 Benchmark]: RCFGBuilder took 183.41 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 170.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,992 INFO L168 Benchmark]: TraceAbstraction took 443.43 ms. Allocated memory is still 201.9 MB. Free memory was 169.3 MB in the beginning and 148.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:18,998 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.58 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.09 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 180.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 183.41 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 170.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 443.43 ms. Allocated memory is still 201.9 MB. Free memory was 169.3 MB in the beginning and 148.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [\old(x)=1, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...