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 -i ../../../trunk/examples/svcomp/loops/nec40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 02:31:25,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 02:31:25,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 02:31:25,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 02:31:25,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 02:31:25,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 02:31:25,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 02:31:25,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 02:31:25,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 02:31:25,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 02:31:25,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 02:31:25,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 02:31:25,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 02:31:25,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 02:31:25,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 02:31:25,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 02:31:25,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 02:31:25,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 02:31:25,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 02:31:25,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 02:31:25,363 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 [2019-09-08 02:31:25,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 02:31:25,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 02:31:25,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 02:31:25,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 02:31:25,397 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 02:31:25,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 02:31:25,397 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 02:31:25,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 02:31:25,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 02:31:25,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 02:31:25,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 02:31:25,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 02:31:25,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 02:31:25,400 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 02:31:25,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 02:31:25,401 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 02:31:25,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 02:31:25,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 02:31:25,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 02:31:25,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 02:31:25,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 02:31:25,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 02:31:25,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 02:31:25,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 02:31:25,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 02:31:25,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 02:31:25,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 02:31:25,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 02:31:25,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 02:31:25,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 02:31:25,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 02:31:25,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 02:31:25,476 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 02:31:25,479 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 02:31:25,480 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec40.c [2019-09-08 02:31:25,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b686990a/6d2f2ead318947ffbe4958a248106f52/FLAGea1730ef8 [2019-09-08 02:31:26,003 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 02:31:26,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec40.c [2019-09-08 02:31:26,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b686990a/6d2f2ead318947ffbe4958a248106f52/FLAGea1730ef8 [2019-09-08 02:31:26,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b686990a/6d2f2ead318947ffbe4958a248106f52 [2019-09-08 02:31:26,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 02:31:26,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 02:31:26,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 02:31:26,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 02:31:26,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 02:31:26,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503d2341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26, skipping insertion in model container [2019-09-08 02:31:26,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,423 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 02:31:26,439 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 02:31:26,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:31:26,636 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 02:31:26,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 02:31:26,763 INFO L192 MainTranslator]: Completed translation [2019-09-08 02:31:26,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26 WrapperNode [2019-09-08 02:31:26,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 02:31:26,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 02:31:26,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 02:31:26,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 02:31:26,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (1/1) ... [2019-09-08 02:31:26,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 02:31:26,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 02:31:26,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 02:31:26,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 02:31:26,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (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 [2019-09-08 02:31:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 02:31:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 02:31:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 02:31:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 02:31:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 02:31:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 02:31:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 02:31:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 02:31:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-08 02:31:26,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-08 02:31:26,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 02:31:26,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-08 02:31:26,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 02:31:26,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-08 02:31:27,072 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 02:31:27,072 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 02:31:27,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:31:27 BoogieIcfgContainer [2019-09-08 02:31:27,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 02:31:27,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 02:31:27,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 02:31:27,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 02:31:27,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 02:31:26" (1/3) ... [2019-09-08 02:31:27,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abba977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:31:27, skipping insertion in model container [2019-09-08 02:31:27,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 02:31:26" (2/3) ... [2019-09-08 02:31:27,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abba977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 02:31:27, skipping insertion in model container [2019-09-08 02:31:27,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 02:31:27" (3/3) ... [2019-09-08 02:31:27,082 INFO L109 eAbstractionObserver]: Analyzing ICFG nec40.c [2019-09-08 02:31:27,093 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 02:31:27,102 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 02:31:27,142 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 02:31:27,175 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 02:31:27,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 02:31:27,176 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 02:31:27,176 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 02:31:27,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 02:31:27,176 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 02:31:27,176 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 02:31:27,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 02:31:27,177 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 02:31:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-08 02:31:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 02:31:27,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:31:27,203 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:31:27,205 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:31:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:31:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -91485938, now seen corresponding path program 1 times [2019-09-08 02:31:27,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:31:27,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:31:27,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:31:27,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:31:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:31:27,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 02:31:27,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 02:31:27,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 02:31:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 02:31:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 02:31:27,376 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-08 02:31:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:31:27,395 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-09-08 02:31:27,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 02:31:27,396 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-08 02:31:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:31:27,404 INFO L225 Difference]: With dead ends: 38 [2019-09-08 02:31:27,404 INFO L226 Difference]: Without dead ends: 16 [2019-09-08 02:31:27,408 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 [2019-09-08 02:31:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-08 02:31:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-08 02:31:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-08 02:31:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-08 02:31:27,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-08 02:31:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:31:27,443 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-08 02:31:27,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 02:31:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-08 02:31:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 02:31:27,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:31:27,444 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:31:27,445 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:31:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:31:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash 883179888, now seen corresponding path program 1 times [2019-09-08 02:31:27,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:31:27,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:31:27,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:31:27,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:31:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 02:31:27,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 02:31:27,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 02:31:27,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 02:31:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 02:31:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 02:31:27,538 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2019-09-08 02:31:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 02:31:27,576 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-08 02:31:27,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 02:31:27,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-08 02:31:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 02:31:27,578 INFO L225 Difference]: With dead ends: 26 [2019-09-08 02:31:27,578 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 02:31:27,579 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 [2019-09-08 02:31:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 02:31:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 02:31:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 02:31:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-08 02:31:27,584 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-09-08 02:31:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 02:31:27,584 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-08 02:31:27,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 02:31:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-08 02:31:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 02:31:27,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 02:31:27,586 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 02:31:27,586 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 02:31:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 02:31:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash 975532875, now seen corresponding path program 1 times [2019-09-08 02:31:27,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 02:31:27,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 02:31:27,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 02:31:27,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 02:31:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 02:31:27,664 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Function const is already defined. at de.uni_freiburg.informatik.ultimate.logic.NoopScript.declareFun(NoopScript.java:139) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.declareFun(Scriptor.java:113) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.WrapperScript.declareFun(WrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.TermTransferrer.convertApplicationTerm(TermTransferrer.java:172) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:252) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-08 02:31:27,672 INFO L168 Benchmark]: Toolchain (without parser) took 1261.02 ms. Allocated memory was 133.7 MB in the beginning and 199.8 MB in the end (delta: 66.1 MB). Free memory was 88.4 MB in the beginning and 129.3 MB in the end (delta: -40.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2019-09-08 02:31:27,673 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 133.7 MB. Free memory is still 106.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-08 02:31:27,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.72 ms. Allocated memory was 133.7 MB in the beginning and 199.8 MB in the end (delta: 66.1 MB). Free memory was 88.4 MB in the beginning and 177.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2019-09-08 02:31:27,678 INFO L168 Benchmark]: Boogie Preprocessor took 47.07 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 174.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-09-08 02:31:27,680 INFO L168 Benchmark]: RCFGBuilder took 261.76 ms. Allocated memory is still 199.8 MB. Free memory was 174.8 MB in the beginning and 160.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-09-08 02:31:27,681 INFO L168 Benchmark]: TraceAbstraction took 591.67 ms. Allocated memory is still 199.8 MB. Free memory was 160.0 MB in the beginning and 130.2 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2019-09-08 02:31:27,689 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 133.7 MB. Free memory is still 106.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.72 ms. Allocated memory was 133.7 MB in the beginning and 199.8 MB in the end (delta: 66.1 MB). Free memory was 88.4 MB in the beginning and 177.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.07 ms. Allocated memory is still 199.8 MB. Free memory was 177.0 MB in the beginning and 174.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.76 ms. Allocated memory is still 199.8 MB. Free memory was 174.8 MB in the beginning and 160.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 591.67 ms. Allocated memory is still 199.8 MB. Free memory was 160.0 MB in the beginning and 130.2 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Function const is already defined. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Function const is already defined.: de.uni_freiburg.informatik.ultimate.logic.NoopScript.declareFun(NoopScript.java:139) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...