/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:29:00,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:29:00,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:29:00,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 16:29:00,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:29:00,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:29:00,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:29:00,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:29:00,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:29:00,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:29:00,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:29:00,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:29:00,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:29:00,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:29:00,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:29:00,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:29:00,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:29:00,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:29:00,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:29:00,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:29:00,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:29:00,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:29:00,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:29:00,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:29:00,796 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:29:00,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:29:00,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:29:00,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:29:00,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:29:00,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:29:00,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:29:00,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:29:00,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:29:00,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:29:00,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:29:00,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:29:00,800 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:29:00,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:29:00,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:29:00,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:29:00,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:29:00,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:29:00,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:29:00,805 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:29:01,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:29:01,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:29:01,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:29:01,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:29:01,434 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:29:01,435 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-04 16:29:01,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb53dd864/f26f5c0c76924f66b73bbd8e734b9c60/FLAG3bbd45cf8 [2020-09-04 16:29:02,215 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:29:02,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-04 16:29:02,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb53dd864/f26f5c0c76924f66b73bbd8e734b9c60/FLAG3bbd45cf8 [2020-09-04 16:29:02,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb53dd864/f26f5c0c76924f66b73bbd8e734b9c60 [2020-09-04 16:29:02,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:29:02,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:29:02,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:29:02,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:29:02,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:29:02,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02, skipping insertion in model container [2020-09-04 16:29:02,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:29:02,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:29:02,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:29:02,870 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:29:02,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:29:02,912 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:29:02,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02 WrapperNode [2020-09-04 16:29:02,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:29:02,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:29:02,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:29:02,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:29:02,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... [2020-09-04 16:29:02,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:29:02,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:29:02,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:29:02,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:29:02,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:29:03,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:29:03,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:29:03,170 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 16:29:03,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:29:03,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:29:03,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:29:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 16:29:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:29:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:29:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:29:03,428 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:29:03,429 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:29:03,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:29:03 BoogieIcfgContainer [2020-09-04 16:29:03,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:29:03,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:29:03,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:29:03,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:29:03,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:29:02" (1/3) ... [2020-09-04 16:29:03,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a68cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:29:03, skipping insertion in model container [2020-09-04 16:29:03,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:29:02" (2/3) ... [2020-09-04 16:29:03,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a68cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:29:03, skipping insertion in model container [2020-09-04 16:29:03,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:29:03" (3/3) ... [2020-09-04 16:29:03,449 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-09-04 16:29:03,467 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:29:03,495 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:29:03,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:29:03,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:29:03,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:29:03,628 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:29:03,629 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:29:03,629 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:29:03,629 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:29:03,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:29:03,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:29:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 16:29:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 16:29:03,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:29:03,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:29:03,670 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:29:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:29:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-09-04 16:29:03,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:29:03,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638613868] [2020-09-04 16:29:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:29:03,776 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:29:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:29:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:03,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:29:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:29:03,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638613868] [2020-09-04 16:29:03,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:29:03,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:29:03,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344058323] [2020-09-04 16:29:04,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:29:04,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:29:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:29:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:29:04,025 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-04 16:29:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:29:04,148 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-09-04 16:29:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:29:04,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-04 16:29:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:29:04,164 INFO L225 Difference]: With dead ends: 44 [2020-09-04 16:29:04,164 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 16:29:04,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:29:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 16:29:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-04 16:29:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 16:29:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-04 16:29:04,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-09-04 16:29:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:29:04,230 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-04 16:29:04,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:29:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-04 16:29:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 16:29:04,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:29:04,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:29:04,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:29:04,235 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:29:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:29:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-09-04 16:29:04,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:29:04,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443245998] [2020-09-04 16:29:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:29:04,240 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:29:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:29:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:29:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:29:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:29:04,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443245998] [2020-09-04 16:29:04,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:29:04,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:29:04,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45446001] [2020-09-04 16:29:04,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:29:04,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:29:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:29:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:29:04,407 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-09-04 16:29:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:29:04,479 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-09-04 16:29:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:29:04,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-04 16:29:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:29:04,482 INFO L225 Difference]: With dead ends: 49 [2020-09-04 16:29:04,482 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 16:29:04,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:29:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 16:29:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-04 16:29:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 16:29:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-04 16:29:04,500 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-09-04 16:29:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:29:04,500 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-04 16:29:04,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:29:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-04 16:29:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 16:29:04,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:29:04,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:29:04,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:29:04,503 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:29:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:29:04,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-09-04 16:29:04,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:29:04,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577947001] [2020-09-04 16:29:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:29:04,508 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:29:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:29:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:29:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:29:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:29:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577947001] [2020-09-04 16:29:04,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:29:04,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:29:04,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723055219] [2020-09-04 16:29:04,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:29:04,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:29:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:29:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:29:04,739 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-09-04 16:29:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:29:04,868 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-04 16:29:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:29:04,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-04 16:29:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:29:04,872 INFO L225 Difference]: With dead ends: 41 [2020-09-04 16:29:04,872 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 16:29:04,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:29:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 16:29:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 16:29:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 16:29:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-04 16:29:04,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-04 16:29:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:29:04,887 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-04 16:29:04,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:29:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-04 16:29:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 16:29:04,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:29:04,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:29:04,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:29:04,891 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:29:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:29:04,892 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-09-04 16:29:04,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:29:04,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640373317] [2020-09-04 16:29:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:29:04,896 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:29:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:29:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:29:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:04,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:29:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:05,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 16:29:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:29:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 16:29:05,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640373317] [2020-09-04 16:29:05,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:29:05,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:29:05,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682624076] [2020-09-04 16:29:05,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:29:05,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:29:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:29:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:29:05,044 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-09-04 16:29:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:29:05,111 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-09-04 16:29:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:29:05,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-04 16:29:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:29:05,119 INFO L225 Difference]: With dead ends: 43 [2020-09-04 16:29:05,119 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 16:29:05,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:29:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 16:29:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-04 16:29:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 16:29:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-04 16:29:05,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38 [2020-09-04 16:29:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:29:05,142 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-04 16:29:05,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:29:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-04 16:29:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 16:29:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:29:05,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:29:05,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:29:05,149 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:29:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:29:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-09-04 16:29:05,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:29:05,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019861639] [2020-09-04 16:29:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:29:05,154 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:29:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:29:05,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:29:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:29:05,315 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:29:05,371 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:29:05,372 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:29:05,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:29:05,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:29:05 BoogieIcfgContainer [2020-09-04 16:29:05,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:29:05,417 INFO L168 Benchmark]: Toolchain (without parser) took 2835.59 ms. Allocated memory was 143.7 MB in the beginning and 230.2 MB in the end (delta: 86.5 MB). Free memory was 101.6 MB in the beginning and 197.8 MB in the end (delta: -96.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:29:05,420 INFO L168 Benchmark]: CDTParser took 1.64 ms. Allocated memory is still 143.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:29:05,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.64 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:29:05,425 INFO L168 Benchmark]: Boogie Preprocessor took 34.18 ms. Allocated memory is still 143.7 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:29:05,435 INFO L168 Benchmark]: RCFGBuilder took 487.63 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.7 MB in the beginning and 167.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:29:05,438 INFO L168 Benchmark]: TraceAbstraction took 1971.98 ms. Allocated memory was 201.3 MB in the beginning and 230.2 MB in the end (delta: 28.8 MB). Free memory was 167.2 MB in the beginning and 197.8 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:29:05,451 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.64 ms. Allocated memory is still 143.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.64 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.18 ms. Allocated memory is still 143.7 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 487.63 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.7 MB in the beginning and 167.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1971.98 ms. Allocated memory was 201.3 MB in the beginning and 230.2 MB in the end (delta: 28.8 MB). Free memory was 167.2 MB in the beginning and 197.8 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 12 SDslu, 342 SDs, 0 SdLazy, 90 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...