./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-theta/unwind2-nondet.i --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis SUFFICIENT --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ebd41074 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/pthread-theta/unwind2-nondet.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis SUFFICIENT --- Real Ultimate output --- This is Ultimate 0.3.0-dev-ebd4107-m [2025-01-23 21:43:30,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-23 21:43:30,861 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-01-23 21:43:30,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-23 21:43:30,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-23 21:43:30,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-23 21:43:30,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-23 21:43:30,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-23 21:43:30,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-23 21:43:30,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-23 21:43:30,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-23 21:43:30,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-23 21:43:30,887 INFO L153 SettingsManager]: * Use SBE=true [2025-01-23 21:43:30,887 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-23 21:43:30,887 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-23 21:43:30,888 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-23 21:43:30,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 21:43:30,889 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-23 21:43:30,889 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-23 21:43:30,890 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> SUFFICIENT [2025-01-23 21:43:31,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-23 21:43:31,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-23 21:43:31,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-23 21:43:31,181 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-23 21:43:31,181 INFO L274 PluginConnector]: CDTParser initialized [2025-01-23 21:43:31,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread-theta/unwind2-nondet.i [2025-01-23 21:43:32,333 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/8115c9b4c/4e35d394e83047dfbb273e22c4474927/FLAG6b1c994ed [2025-01-23 21:43:32,533 INFO L384 CDTParser]: Found 1 translation units. [2025-01-23 21:43:32,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-theta/unwind2-nondet.i [2025-01-23 21:43:32,542 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/8115c9b4c/4e35d394e83047dfbb273e22c4474927/FLAG6b1c994ed [2025-01-23 21:43:32,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/8115c9b4c/4e35d394e83047dfbb273e22c4474927 [2025-01-23 21:43:32,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-23 21:43:32,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-23 21:43:32,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-23 21:43:32,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-23 21:43:32,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-23 21:43:32,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 09:43:32" (1/1) ... [2025-01-23 21:43:32,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcfdd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:32, skipping insertion in model container [2025-01-23 21:43:32,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 09:43:32" (1/1) ... [2025-01-23 21:43:32,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-23 21:43:33,163 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-theta/unwind2-nondet.i[33026,33039] [2025-01-23 21:43:33,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 21:43:33,180 INFO L200 MainTranslator]: Completed pre-run [2025-01-23 21:43:33,269 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread-theta/unwind2-nondet.i[33026,33039] [2025-01-23 21:43:33,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 21:43:33,302 INFO L204 MainTranslator]: Completed translation [2025-01-23 21:43:33,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33 WrapperNode [2025-01-23 21:43:33,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-23 21:43:33,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-23 21:43:33,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-23 21:43:33,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-23 21:43:33,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,336 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2025-01-23 21:43:33,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-23 21:43:33,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-23 21:43:33,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-23 21:43:33,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-23 21:43:33,343 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,351 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-23 21:43:33,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-23 21:43:33,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-23 21:43:33,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-23 21:43:33,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (1/1) ... [2025-01-23 21:43:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 21:43:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:33,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2025-01-23 21:43:33,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2025-01-23 21:43:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-23 21:43:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-01-23 21:43:33,424 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-01-23 21:43:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-01-23 21:43:33,424 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-01-23 21:43:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-01-23 21:43:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-23 21:43:33,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-23 21:43:33,425 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-23 21:43:33,551 INFO L234 CfgBuilder]: Building ICFG [2025-01-23 21:43:33,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-23 21:43:33,669 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-23 21:43:33,670 INFO L283 CfgBuilder]: Performing block encoding [2025-01-23 21:43:33,753 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-23 21:43:33,757 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-23 21:43:33,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 09:43:33 BoogieIcfgContainer [2025-01-23 21:43:33,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-23 21:43:33,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-23 21:43:33,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-23 21:43:33,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-23 21:43:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 09:43:32" (1/3) ... [2025-01-23 21:43:33,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a200e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 09:43:33, skipping insertion in model container [2025-01-23 21:43:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:43:33" (2/3) ... [2025-01-23 21:43:33,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a200e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 09:43:33, skipping insertion in model container [2025-01-23 21:43:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 09:43:33" (3/3) ... [2025-01-23 21:43:33,764 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind2-nondet.i [2025-01-23 21:43:33,775 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-23 21:43:33,777 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind2-nondet.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-01-23 21:43:33,777 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-23 21:43:33,814 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-23 21:43:33,845 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 21:43:33,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-23 21:43:33,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:33,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-01-23 21:43:33,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-01-23 21:43:33,909 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-23 21:43:33,921 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == f2Thread1of1ForFork1 ======== [2025-01-23 21:43:33,930 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@fcbc90a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 21:43:33,931 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-23 21:43:34,122 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:34,122 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:34,123 INFO L139 ounterexampleChecker]: Examining path program with hash -1933500773, occurence #1 [2025-01-23 21:43:34,123 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 21:43:34,123 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:34,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash 81411259, now seen corresponding path program 1 times [2025-01-23 21:43:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037724819] [2025-01-23 21:43:34,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:34,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-23 21:43:34,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-23 21:43:34,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:34,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:34,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037724819] [2025-01-23 21:43:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037724819] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 21:43:34,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 21:43:34,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-23 21:43:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801862176] [2025-01-23 21:43:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 21:43:34,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-23 21:43:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:34,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-23 21:43:34,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-23 21:43:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:34,455 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:34,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:34,458 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:34,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-23 21:43:34,571 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:34,571 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:34,571 INFO L139 ounterexampleChecker]: Examining path program with hash -1933500773, occurence #2 [2025-01-23 21:43:34,571 INFO L145 ounterexampleChecker]: Trying to synthesize and prove commutativity condition. [2025-01-23 21:43:34,572 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 1 [2025-01-23 21:43:34,587 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:34,587 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 6 [2025-01-23 21:43:34,587 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:34,587 WARN L214 ounterexampleChecker]: Failed to synthesize and prove commutativity condition. [2025-01-23 21:43:34,587 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:34,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 925531749, now seen corresponding path program 1 times [2025-01-23 21:43:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214143976] [2025-01-23 21:43:34,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:34,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-23 21:43:34,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-23 21:43:34,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:34,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214143976] [2025-01-23 21:43:34,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214143976] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 21:43:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892995429] [2025-01-23 21:43:34,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:34,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:34,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 21:43:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-23 21:43:34,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-23 21:43:34,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-23 21:43:34,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:34,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:34,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-23 21:43:34,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 21:43:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:35,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 21:43:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:35,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892995429] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 21:43:35,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 21:43:35,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2025-01-23 21:43:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284277454] [2025-01-23 21:43:35,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 21:43:35,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-23 21:43:35,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:35,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-23 21:43:35,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2025-01-23 21:43:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:35,282 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:35,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:35,282 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:35,282 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-23 21:43:35,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-23 21:43:36,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:36,148 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:36,148 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:36,148 INFO L139 ounterexampleChecker]: Examining path program with hash -1933500773, occurence #3 [2025-01-23 21:43:36,148 INFO L145 ounterexampleChecker]: Trying to synthesize and prove commutativity condition. [2025-01-23 21:43:36,148 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 1 [2025-01-23 21:43:36,148 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:36,148 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 6 [2025-01-23 21:43:36,148 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:36,149 WARN L214 ounterexampleChecker]: Failed to synthesize and prove commutativity condition. [2025-01-23 21:43:36,149 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:36,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash 173225059, now seen corresponding path program 2 times [2025-01-23 21:43:36,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:36,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731895625] [2025-01-23 21:43:36,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 21:43:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:36,156 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-01-23 21:43:36,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-23 21:43:36,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 21:43:36,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-23 21:43:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731895625] [2025-01-23 21:43:36,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731895625] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 21:43:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031299747] [2025-01-23 21:43:36,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 21:43:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:36,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 21:43:36,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-23 21:43:36,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-01-23 21:43:36,324 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-01-23 21:43:36,324 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 21:43:36,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:36,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-23 21:43:36,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 21:43:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:36,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 21:43:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031299747] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 21:43:36,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 21:43:36,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 36 [2025-01-23 21:43:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834515333] [2025-01-23 21:43:36,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 21:43:36,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-01-23 21:43:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:36,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-01-23 21:43:36,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2025-01-23 21:43:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:36,915 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:36,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:36,915 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:36,915 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 25 states. [2025-01-23 21:43:36,915 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-01-23 21:43:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2025-01-23 21:43:41,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-23 21:43:41,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:41,623 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:41,623 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:41,623 INFO L139 ounterexampleChecker]: Examining path program with hash 548938410, occurence #1 [2025-01-23 21:43:41,623 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 21:43:41,623 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:41,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1319287373, now seen corresponding path program 3 times [2025-01-23 21:43:41,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:41,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592276194] [2025-01-23 21:43:41,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-23 21:43:41,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:41,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-01-23 21:43:41,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 25 of 25 statements. [2025-01-23 21:43:41,648 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-23 21:43:41,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-23 21:43:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592276194] [2025-01-23 21:43:41,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592276194] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 21:43:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026800448] [2025-01-23 21:43:41,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-23 21:43:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:41,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 21:43:41,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-23 21:43:41,885 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-01-23 21:43:41,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 25 of 25 statements. [2025-01-23 21:43:41,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-23 21:43:41,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:41,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-23 21:43:41,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 21:43:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:42,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 21:43:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 21:43:42,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026800448] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 21:43:42,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 21:43:42,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 33 [2025-01-23 21:43:42,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080268982] [2025-01-23 21:43:42,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 21:43:42,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-23 21:43:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:42,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-23 21:43:42,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2025-01-23 21:43:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:42,348 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:42,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:42,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:42,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 45 states. [2025-01-23 21:43:42,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 102 states. [2025-01-23 21:43:42,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-01-23 21:43:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2025-01-23 21:43:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-23 21:43:43,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-23 21:43:43,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:43,677 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:43,677 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:43,677 INFO L139 ounterexampleChecker]: Examining path program with hash 1608695847, occurence #1 [2025-01-23 21:43:43,677 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 21:43:43,677 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:43,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1872765780, now seen corresponding path program 1 times [2025-01-23 21:43:43,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:43,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833637404] [2025-01-23 21:43:43,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:43,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-23 21:43:43,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-23 21:43:43,686 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:43,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-23 21:43:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833637404] [2025-01-23 21:43:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833637404] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 21:43:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408629077] [2025-01-23 21:43:43,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:43,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 21:43:43,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-23 21:43:43,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-23 21:43:43,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-23 21:43:43,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:43,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:43,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-23 21:43:43,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 21:43:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-23 21:43:44,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 21:43:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-23 21:43:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408629077] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 21:43:44,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 21:43:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 38 [2025-01-23 21:43:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794306347] [2025-01-23 21:43:44,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 21:43:44,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-23 21:43:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:44,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-23 21:43:44,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2025-01-23 21:43:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:44,284 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:44,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:44,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:44,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 47 states. [2025-01-23 21:43:44,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 104 states. [2025-01-23 21:43:44,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 37 states. [2025-01-23 21:43:44,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-01-23 21:43:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2025-01-23 21:43:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-23 21:43:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-01-23 21:43:45,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-23 21:43:46,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:46,072 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:46,072 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:46,073 INFO L139 ounterexampleChecker]: Examining path program with hash 1608695847, occurence #2 [2025-01-23 21:43:46,073 INFO L145 ounterexampleChecker]: Trying to synthesize and prove commutativity condition. [2025-01-23 21:43:46,073 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 1 [2025-01-23 21:43:46,073 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:46,073 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 4 [2025-01-23 21:43:46,073 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-01-23 21:43:46,073 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 6 [2025-01-23 21:43:46,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash -519657760, now seen corresponding path program 1 times [2025-01-23 21:43:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SMTINTERPOL [2025-01-23 21:43:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54530522] [2025-01-23 21:43:46,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:46,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:46,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-23 21:43:46,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-23 21:43:46,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:46,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 21:43:46,088 INFO L130 FreeRefinementEngine]: Strategy SMTINTERPOL found a feasible trace [2025-01-23 21:43:46,088 INFO L180 ounterexampleChecker]: Commutativity condition check vielded CONDITION_NOT_SATISFIED. Marking as hopeless. [2025-01-23 21:43:46,088 WARN L214 ounterexampleChecker]: Failed to synthesize and prove commutativity condition. [2025-01-23 21:43:46,088 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:46,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1453404066, now seen corresponding path program 2 times [2025-01-23 21:43:46,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:46,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390882181] [2025-01-23 21:43:46,088 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 21:43:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:46,091 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-01-23 21:43:46,097 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-23 21:43:46,100 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 21:43:46,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-23 21:43:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 21:43:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390882181] [2025-01-23 21:43:46,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390882181] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 21:43:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967075139] [2025-01-23 21:43:46,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 21:43:46,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 21:43:46,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 21:43:46,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 21:43:46,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-23 21:43:46,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-01-23 21:43:46,268 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-23 21:43:46,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 21:43:46,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 21:43:46,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-23 21:43:46,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 21:43:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-01-23 21:43:46,302 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-23 21:43:46,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967075139] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 21:43:46,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-23 21:43:46,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-01-23 21:43:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056221215] [2025-01-23 21:43:46,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 21:43:46,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-23 21:43:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 21:43:46,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-23 21:43:46,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-01-23 21:43:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:46,303 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 21:43:46,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 47 states. [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 104 states. [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 37 states. [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 85 states. [2025-01-23 21:43:46,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 21:43:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 21:43:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-01-23 21:43:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2025-01-23 21:43:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-23 21:43:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-01-23 21:43:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-23 21:43:46,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-23 21:43:46,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-23 21:43:46,623 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 21:43:46,624 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 21:43:46,624 INFO L139 ounterexampleChecker]: Examining path program with hash -163534980, occurence #1 [2025-01-23 21:43:46,624 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 21:43:46,624 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 21:43:46,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 21:43:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2075079783, now seen corresponding path program 1 times [2025-01-23 21:43:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 21:43:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967964437] [2025-01-23 21:43:46,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 21:43:46,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 21:43:46,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-23 21:43:46,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-23 21:43:46,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:46,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 21:43:46,637 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-23 21:43:46,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-23 21:43:46,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-23 21:43:46,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 21:43:46,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 21:43:46,658 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-23 21:43:46,658 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-23 21:43:46,659 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-23 21:43:46,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-23 21:43:46,663 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2025-01-23 21:43:46,664 INFO L319 ceAbstractionStarter]: Result for error location f2Thread1of1ForFork1 was UNSAFE (1/3) [2025-01-23 21:43:46,703 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-23 21:43:46,703 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-23 21:43:46,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2025-01-23 21:43:46,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 09:43:46 BasicIcfg [2025-01-23 21:43:46,711 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-23 21:43:46,712 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-23 21:43:46,712 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-23 21:43:46,712 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-23 21:43:46,712 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 09:43:33" (3/4) ... [2025-01-23 21:43:46,713 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-01-23 21:43:46,762 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 25. [2025-01-23 21:43:46,809 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/witness.graphml [2025-01-23 21:43:46,812 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/witness.yml [2025-01-23 21:43:46,812 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-23 21:43:46,812 INFO L158 Benchmark]: Toolchain (without parser) took 13907.40ms. Allocated memory was 83.9MB in the beginning and 201.3MB in the end (delta: 117.4MB). Free memory was 54.2MB in the beginning and 54.8MB in the end (delta: -613.0kB). Peak memory consumption was 115.1MB. Max. memory is 16.1GB. [2025-01-23 21:43:46,813 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 83.9MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 17.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 21:43:46,813 INFO L158 Benchmark]: CACSL2BoogieTranslator took 398.90ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 32.5MB in the end (delta: 21.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-23 21:43:46,813 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.75ms. Allocated memory is still 83.9MB. Free memory was 32.5MB in the beginning and 30.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 21:43:46,813 INFO L158 Benchmark]: Boogie Preprocessor took 25.51ms. Allocated memory is still 83.9MB. Free memory was 30.8MB in the beginning and 29.8MB in the end (delta: 994.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 21:43:46,813 INFO L158 Benchmark]: RCFGBuilder took 392.94ms. Allocated memory is still 83.9MB. Free memory was 29.8MB in the beginning and 39.9MB in the end (delta: -10.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2025-01-23 21:43:46,816 INFO L158 Benchmark]: TraceAbstraction took 12952.96ms. Allocated memory was 83.9MB in the beginning and 201.3MB in the end (delta: 117.4MB). Free memory was 39.1MB in the beginning and 64.9MB in the end (delta: -25.8MB). Peak memory consumption was 94.8MB. Max. memory is 16.1GB. [2025-01-23 21:43:46,816 INFO L158 Benchmark]: Witness Printer took 100.24ms. Allocated memory is still 201.3MB. Free memory was 64.9MB in the beginning and 54.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-23 21:43:46,817 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 83.9MB. Free memory was 51.8MB in the beginning and 51.8MB in the end (delta: 17.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 398.90ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 32.5MB in the end (delta: 21.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.75ms. Allocated memory is still 83.9MB. Free memory was 32.5MB in the beginning and 30.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.51ms. Allocated memory is still 83.9MB. Free memory was 30.8MB in the beginning and 29.8MB in the end (delta: 994.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 392.94ms. Allocated memory is still 83.9MB. Free memory was 29.8MB in the beginning and 39.9MB in the end (delta: -10.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 12952.96ms. Allocated memory was 83.9MB in the beginning and 201.3MB in the end (delta: 117.4MB). Free memory was 39.1MB in the beginning and 64.9MB in the end (delta: -25.8MB). Peak memory consumption was 94.8MB. Max. memory is 16.1GB. * Witness Printer took 100.24ms. Allocated memory is still 201.3MB. Free memory was 64.9MB in the beginning and 54.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7464, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 1646, dependent conditional: 1638, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5839, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 21, dependent conditional: 13, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 5839, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 21, dependent conditional: 13, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 61, dependent conditional: 53, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 0, independent unconditional: 5818, dependent: 61, dependent conditional: 40, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 0, independent unconditional: 5818, dependent: 61, dependent conditional: 40, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 351, independent: 333, independent conditional: 0, independent unconditional: 333, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 351, independent: 331, independent conditional: 0, independent unconditional: 331, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 20, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 20, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 212, independent: 65, independent conditional: 0, independent unconditional: 65, dependent: 147, dependent conditional: 38, dependent unconditional: 109, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 1, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 5879, independent: 5485, independent conditional: 0, independent unconditional: 5485, dependent: 43, dependent conditional: 30, dependent unconditional: 13, unknown: 351, unknown conditional: 10, unknown unconditional: 341] , Statistics on independence cache: Total cache size (in pairs): 352, Positive cache size: 334, Positive conditional cache size: 1, Positive unconditional cache size: 333, Negative cache size: 18, Negative conditional cache size: 10, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 5499, Maximal queried relation: 4, Independence queries for same thread: 1625, Persistent sets #1 benchmarks: Persistent set computation time: 0.2s, Number of persistent set computation: 55, Number of trivial persistent sets: 39, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 340, independent: 332, independent conditional: 0, independent unconditional: 332, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 7464, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 1646, dependent conditional: 1638, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5839, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 21, dependent conditional: 13, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 5839, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 21, dependent conditional: 13, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 5486, independent unconditional: 332, dependent: 61, dependent conditional: 53, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 0, independent unconditional: 5818, dependent: 61, dependent conditional: 40, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 5879, independent: 5818, independent conditional: 0, independent unconditional: 5818, dependent: 61, dependent conditional: 40, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 351, independent: 333, independent conditional: 0, independent unconditional: 333, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 351, independent: 331, independent conditional: 0, independent unconditional: 331, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 20, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 20, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 18, dependent conditional: 10, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 212, independent: 65, independent conditional: 0, independent unconditional: 65, dependent: 147, dependent conditional: 38, dependent unconditional: 109, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 1, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 5879, independent: 5485, independent conditional: 0, independent unconditional: 5485, dependent: 43, dependent conditional: 30, dependent unconditional: 13, unknown: 351, unknown conditional: 10, unknown unconditional: 341] , Statistics on independence cache: Total cache size (in pairs): 352, Positive cache size: 334, Positive conditional cache size: 1, Positive unconditional cache size: 333, Negative cache size: 18, Negative conditional cache size: 10, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 5499, Maximal queried relation: 4, Independence queries for same thread: 1625 - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L775] 0 _N = __VERIFIER_nondet_int() [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=7, limit=0, t1=-1] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, lim=7, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=7, limit=0, t1=-1, t2=0] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, lim=8, limit=0] [L768] 2 limit = lim VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, lim=8, limit=8] [L759] 1 limit = lim VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, lim=7, limit=7] [L760] 1 bound = limit [L761] 1 i = 0 VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=0, lim=7, limit=7] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=0, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=1, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=1, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=2, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=2, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=3, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=3, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=4, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=4, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=5, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=5, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=6, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=6, lim=8, limit=7] [L761] COND TRUE 1 i < bound [L761] 1 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=7, lim=7, limit=7] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\at(arg, Pre)={0:0}, _N=7, arg={0:0}, bound=7, i=7, lim=8, limit=7] [L761] COND FALSE 1 !(i < bound) [L762] CALL 1 __VERIFIER_assert(i == lim) [L753] COND FALSE 1 !(!expression) VAL [\at(expression, Pre)=1, _N=7, expression=1, limit=7] [L762] RET 1 __VERIFIER_assert(i == lim) [L763] 1 return 0; [L780] FCALL, JOIN 1 pthread_join(t1, 0) VAL [_N=7, limit=7, t1=-1, t2=0] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\at(expression, Pre)=0, _N=7, expression=0, limit=7] [L753] 2 reach_error() VAL [\at(expression, Pre)=0, _N=7, expression=0, limit=7] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: f2Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 12.8s, OverallIterations: 7, TraceHistogramMax: 0, PathProgramHistogramMax: 3, EmptinessCheckTime: 8.3s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 288, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 350 ConstructedInterpolants, 0 QuantifiedInterpolants, 1861 SizeOfPredicates, 28 NumberOfNonLiveVariables, 594 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 147/371 InterpolantCoveringCapability, 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, ConComCheckerStatistics: SuccessfulCommutativityProofs: 0, ConComChecker Statistics: CheckTime [ms]: 29, ConditionCalculationTime [ms]: 9, ConditionCalculations: 1, QuantifiedConditions: 0, TraceChecks: 1, UnknownTraceChecks: 0, UnsatisfiedConditions: 1, ImperfectProofs: 0 RESULT: Ultimate proved your program to be incorrect! [2025-01-23 21:43:46,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE