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/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:46:26,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:46:26,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:46:26,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:46:26,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:46:26,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:46:26,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:46:26,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:46:26,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:46:26,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:46:26,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:46:26,393 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:46:26,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:46:26,393 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:46:26,394 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:46:26,394 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:46:26,394 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:46:26,394 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:46:26,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:46:26,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:46:26,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:46:26,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:46:26,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:46:26,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:46:26,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:46:26,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:46:26,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:46:26,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:46:26,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:46:26,397 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:46:26,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:46:26,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:46:26,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:46:26,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:46:26,398 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:46:26,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:46:26,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:46:26,399 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:46:26,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:46:26,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:46:26,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:46:26,442 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:46:26,443 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:46:26,444 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2019-09-10 01:46:26,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a63cc2e/5c684572d05349be91658cef89ce0e78/FLAG422b0f849 [2019-09-10 01:46:26,924 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:46:26,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-1.c [2019-09-10 01:46:26,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a63cc2e/5c684572d05349be91658cef89ce0e78/FLAG422b0f849 [2019-09-10 01:46:27,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a63cc2e/5c684572d05349be91658cef89ce0e78 [2019-09-10 01:46:27,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:46:27,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:46:27,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:27,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:46:27,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:46:27,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696822e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27, skipping insertion in model container [2019-09-10 01:46:27,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,363 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:46:27,380 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:46:27,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:27,592 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:46:27,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:27,729 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:46:27,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27 WrapperNode [2019-09-10 01:46:27,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:27,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:46:27,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:46:27,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:46:27,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... [2019-09-10 01:46:27,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:46:27,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:46:27,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:46:27,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:46:27,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:46:27,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-10 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:46:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:46:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 01:46:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-10 01:46:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-10 01:46:27,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:46:27,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:46:28,159 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:46:28,159 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-10 01:46:28,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:28 BoogieIcfgContainer [2019-09-10 01:46:28,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:46:28,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:46:28,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:46:28,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:46:28,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:46:27" (1/3) ... [2019-09-10 01:46:28,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710fea8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:28, skipping insertion in model container [2019-09-10 01:46:28,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:27" (2/3) ... [2019-09-10 01:46:28,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710fea8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:28, skipping insertion in model container [2019-09-10 01:46:28,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:28" (3/3) ... [2019-09-10 01:46:28,168 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-1.c [2019-09-10 01:46:28,177 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:46:28,184 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:46:28,200 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:46:28,222 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:46:28,223 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:46:28,223 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:46:28,223 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:46:28,223 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:46:28,223 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:46:28,224 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:46:28,224 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:46:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-09-10 01:46:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 01:46:28,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:28,249 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:28,251 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2019-09-10 01:46:28,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,306 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:28,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:46:28,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 01:46:28,402 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:28,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:28,424 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-09-10 01:46:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:28,442 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-09-10 01:46:28,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:28,443 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-10 01:46:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:28,453 INFO L225 Difference]: With dead ends: 25 [2019-09-10 01:46:28,454 INFO L226 Difference]: Without dead ends: 20 [2019-09-10 01:46:28,456 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-10 01:46:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-10 01:46:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-10 01:46:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-10 01:46:28,496 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-09-10 01:46:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:28,496 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-10 01:46:28,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-10 01:46:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 01:46:28,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:28,499 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:28,499 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2019-09-10 01:46:28,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:28,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:28,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,503 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:28,661 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:46:28,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:46:28,661 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:28,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:46:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:46:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:46:28,666 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-09-10 01:46:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:28,717 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-10 01:46:28,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:46:28,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-10 01:46:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:28,720 INFO L225 Difference]: With dead ends: 22 [2019-09-10 01:46:28,720 INFO L226 Difference]: Without dead ends: 22 [2019-09-10 01:46:28,721 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:46:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-10 01:46:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-10 01:46:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 01:46:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-10 01:46:28,726 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-09-10 01:46:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:28,727 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-10 01:46:28,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:46:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-10 01:46:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-10 01:46:28,730 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:28,731 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:28,731 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2019-09-10 01:46:28,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:28,734 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:28,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:46:28,866 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:46:28,867 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2019-09-10 01:46:28,869 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [21], [24], [29], [32], [39], [42], [52], [55], [56], [57], [58], [59], [61], [62] [2019-09-10 01:46:28,921 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:46:28,921 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:46:28,994 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:46:28,996 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 0. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 36 variables. [2019-09-10 01:46:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:29,000 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:46:29,034 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-10 01:46:29,034 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:46:29,038 INFO L420 sIntCurrentIteration]: We unified 19 AI predicates to 19 [2019-09-10 01:46:29,038 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:46:29,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:46:29,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-10 01:46:29,039 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:29,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:29,041 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 2 states. [2019-09-10 01:46:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:29,042 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-10 01:46:29,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:29,042 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-09-10 01:46:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:29,043 INFO L225 Difference]: With dead ends: 6 [2019-09-10 01:46:29,043 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:46:29,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:46:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:46:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:46:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:46:29,044 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-09-10 01:46:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:29,045 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:46:29,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:46:29,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:46:29,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:46:29 BoogieIcfgContainer [2019-09-10 01:46:29,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:46:29,053 INFO L168 Benchmark]: Toolchain (without parser) took 1705.37 ms. Allocated memory was 135.3 MB in the beginning and 202.9 MB in the end (delta: 67.6 MB). Free memory was 91.1 MB in the beginning and 120.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,054 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory is still 109.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-10 01:46:29,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.43 ms. Allocated memory was 135.3 MB in the beginning and 202.9 MB in the end (delta: 67.6 MB). Free memory was 91.1 MB in the beginning and 180.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,056 INFO L168 Benchmark]: Boogie Preprocessor took 36.63 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 177.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,058 INFO L168 Benchmark]: RCFGBuilder took 393.16 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 160.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,059 INFO L168 Benchmark]: TraceAbstraction took 889.01 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 120.0 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,070 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 135.3 MB. Free memory is still 109.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.43 ms. Allocated memory was 135.3 MB in the beginning and 202.9 MB in the end (delta: 67.6 MB). Free memory was 91.1 MB in the beginning and 180.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.63 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 177.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.16 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 160.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 889.01 ms. Allocated memory is still 202.9 MB. Free memory was 160.6 MB in the beginning and 120.0 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: 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, 25 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 1 SDslu, 17 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 0.8947368421052632 AbsIntWeakeningRatio, 1.736842105263158 AbsIntAvgWeakeningVarsNumRemoved, 0.3157894736842105 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 1054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...