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/recursive-simple/id_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 03:10:10,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 03:10:10,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 03:10:10,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 03:10:10,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 03:10:10,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 03:10:10,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 03:10:10,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 03:10:10,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 03:10:10,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 03:10:10,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 03:10:10,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 03:10:10,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 03:10:10,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 03:10:10,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 03:10:10,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 03:10:10,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 03:10:10,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 03:10:10,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 03:10:10,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 03:10:10,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 03:10:10,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 03:10:10,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 03:10:10,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 03:10:10,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 03:10:10,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 03:10:10,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 03:10:10,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 03:10:10,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 03:10:10,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 03:10:10,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 03:10:10,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 03:10:10,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 03:10:10,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 03:10:10,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 03:10:10,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 03:10:10,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 03:10:10,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 03:10:10,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 03:10:10,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 03:10:10,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 03:10:10,338 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 03:10:10,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 03:10:10,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 03:10:10,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 03:10:10,353 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 03:10:10,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 03:10:10,354 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 03:10:10,354 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 03:10:10,354 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 03:10:10,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 03:10:10,355 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 03:10:10,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 03:10:10,356 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 03:10:10,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 03:10:10,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 03:10:10,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 03:10:10,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 03:10:10,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 03:10:10,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 03:10:10,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 03:10:10,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 03:10:10,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 03:10:10,358 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 03:10:10,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 03:10:10,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 03:10:10,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 03:10:10,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 03:10:10,359 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 03:10:10,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 03:10:10,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 03:10:10,360 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 03:10:10,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 03:10:10,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 03:10:10,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 03:10:10,412 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 03:10:10,413 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 03:10:10,413 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2019-09-10 03:10:10,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6b8a0e2/1096ac25b94642a89908a4bdab658bbf/FLAG668c0af7a [2019-09-10 03:10:10,940 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 03:10:10,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o3.c [2019-09-10 03:10:10,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6b8a0e2/1096ac25b94642a89908a4bdab658bbf/FLAG668c0af7a [2019-09-10 03:10:11,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6b8a0e2/1096ac25b94642a89908a4bdab658bbf [2019-09-10 03:10:11,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 03:10:11,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 03:10:11,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 03:10:11,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 03:10:11,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 03:10:11,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0be58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11, skipping insertion in model container [2019-09-10 03:10:11,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,362 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 03:10:11,378 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 03:10:11,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:10:11,581 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 03:10:11,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:10:11,606 INFO L192 MainTranslator]: Completed translation [2019-09-10 03:10:11,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11 WrapperNode [2019-09-10 03:10:11,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 03:10:11,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 03:10:11,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 03:10:11,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 03:10:11,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (1/1) ... [2019-09-10 03:10:11,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 03:10:11,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 03:10:11,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 03:10:11,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 03:10:11,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (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 03:10:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 03:10:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 03:10:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-10 03:10:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 03:10:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 03:10:11,928 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 03:10:11,928 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 03:10:11,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:10:11 BoogieIcfgContainer [2019-09-10 03:10:11,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 03:10:11,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 03:10:11,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 03:10:11,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 03:10:11,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 03:10:11" (1/3) ... [2019-09-10 03:10:11,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d268506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:10:11, skipping insertion in model container [2019-09-10 03:10:11,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:10:11" (2/3) ... [2019-09-10 03:10:11,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d268506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:10:11, skipping insertion in model container [2019-09-10 03:10:11,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:10:11" (3/3) ... [2019-09-10 03:10:11,938 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-09-10 03:10:11,948 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 03:10:11,956 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 03:10:11,974 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 03:10:12,002 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 03:10:12,002 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 03:10:12,002 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 03:10:12,003 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 03:10:12,003 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 03:10:12,003 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 03:10:12,003 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 03:10:12,003 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 03:10:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-10 03:10:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 03:10:12,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:10:12,031 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:10:12,032 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:10:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:10:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-10 03:10:12,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:10:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:12,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:10:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:12,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:10:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:10:12,333 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 03:10:12,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 03:10:12,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 03:10:12,336 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 03:10:12,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 03:10:12,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 03:10:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 03:10:12,360 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-10 03:10:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:10:12,425 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-09-10 03:10:12,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 03:10:12,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-10 03:10:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:10:12,440 INFO L225 Difference]: With dead ends: 26 [2019-09-10 03:10:12,440 INFO L226 Difference]: Without dead ends: 18 [2019-09-10 03:10:12,442 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 03:10:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-10 03:10:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-10 03:10:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 03:10:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-10 03:10:12,482 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-10 03:10:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:10:12,483 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-10 03:10:12,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 03:10:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-10 03:10:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 03:10:12,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:10:12,486 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:10:12,486 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:10:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:10:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-10 03:10:12,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:10:12,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:12,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:10:12,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:12,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:10:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:10:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:10:12,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:10:12,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:10:12,644 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-10 03:10:12,646 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2019-09-10 03:10:12,686 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 03:10:12,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 03:10:12,760 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 03:10:12,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 03:10:12,889 INFO L272 AbstractInterpreter]: Visited 17 different actions 57 times. Merged at 5 different actions 21 times. Never widened. Performed 46 root evaluator evaluations with a maximum evaluation depth of 4. Performed 46 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2019-09-10 03:10:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:10:12,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 03:10:12,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:10:12,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:10:12,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:10:12,917 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 03:10:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:10:12,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-10 03:10:12,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:10:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:10:13,024 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:10:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:10:13,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:10:13,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-10 03:10:13,201 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:10:13,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 03:10:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 03:10:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-10 03:10:13,203 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2019-09-10 03:10:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:10:13,245 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-09-10 03:10:13,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 03:10:13,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-09-10 03:10:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:10:13,247 INFO L225 Difference]: With dead ends: 23 [2019-09-10 03:10:13,248 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 03:10:13,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-10 03:10:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 03:10:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-10 03:10:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 03:10:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-10 03:10:13,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-10 03:10:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:10:13,255 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-10 03:10:13,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 03:10:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-10 03:10:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-10 03:10:13,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:10:13,257 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:10:13,257 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:10:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:10:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-10 03:10:13,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:10:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:13,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:10:13,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:13,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:10:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:10:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 03:10:13,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:10:13,473 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:10:13,474 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 03:10:13,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 03:10:13,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:10:13,478 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:10:13,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 03:10:13,498 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 03:10:13,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 03:10:13,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 03:10:13,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-10 03:10:13,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:10:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 03:10:13,572 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:10:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 03:10:13,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:10:13,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2019-09-10 03:10:13,843 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:10:13,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 03:10:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 03:10:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-10 03:10:13,844 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2019-09-10 03:10:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:10:13,887 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-09-10 03:10:13,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 03:10:13,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2019-09-10 03:10:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:10:13,889 INFO L225 Difference]: With dead ends: 26 [2019-09-10 03:10:13,889 INFO L226 Difference]: Without dead ends: 24 [2019-09-10 03:10:13,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-10 03:10:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-10 03:10:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-10 03:10:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-10 03:10:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-10 03:10:13,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-10 03:10:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:10:13,896 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-10 03:10:13,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 03:10:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-10 03:10:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-10 03:10:13,897 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:10:13,898 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:10:13,898 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:10:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:10:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-10 03:10:13,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:10:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:13,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 03:10:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:10:13,900 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:10:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 03:10:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 03:10:13,988 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-10 03:10:14,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 03:10:14 BoogieIcfgContainer [2019-09-10 03:10:14,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 03:10:14,026 INFO L168 Benchmark]: Toolchain (without parser) took 2679.57 ms. Allocated memory was 133.7 MB in the beginning and 226.5 MB in the end (delta: 92.8 MB). Free memory was 88.1 MB in the beginning and 146.7 MB in the end (delta: -58.5 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2019-09-10 03:10:14,028 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 106.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-10 03:10:14,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.63 ms. Allocated memory is still 133.7 MB. Free memory was 87.7 MB in the beginning and 79.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2019-09-10 03:10:14,032 INFO L168 Benchmark]: Boogie Preprocessor took 114.08 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 79.0 MB in the beginning and 177.6 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2019-09-10 03:10:14,033 INFO L168 Benchmark]: RCFGBuilder took 207.70 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 166.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-10 03:10:14,035 INFO L168 Benchmark]: TraceAbstraction took 2091.86 ms. Allocated memory was 200.3 MB in the beginning and 226.5 MB in the end (delta: 26.2 MB). Free memory was 166.4 MB in the beginning and 146.7 MB in the end (delta: 19.7 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2019-09-10 03:10:14,046 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 106.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.63 ms. Allocated memory is still 133.7 MB. Free memory was 87.7 MB in the beginning and 79.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.08 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 79.0 MB in the beginning and 177.6 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 207.70 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 166.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2091.86 ms. Allocated memory was 200.3 MB in the beginning and 226.5 MB in the end (delta: 26.2 MB). Free memory was 166.4 MB in the beginning and 146.7 MB in the end (delta: 19.7 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=3, input=3] [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 VAL [input=3, result=3] [L13] __VERIFIER_error() VAL [input=3, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 2.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 2 SDslu, 268 SDs, 0 SdLazy, 57 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 9966 SizeOfPredicates, 2 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 27/54 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...