./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/reorder_2.i --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NECESSARY_AND_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/reorder_2.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 eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NECESSARY_AND_SUFFICIENT --- Real Ultimate output --- This is Ultimate 0.3.0-dev-ebd4107-m [2025-01-23 22:11:59,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-23 22:11:59,096 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-01-23 22:11:59,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-23 22:11:59,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-23 22:11:59,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-23 22:11:59,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-23 22:11:59,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-23 22:11:59,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-23 22:11:59,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-23 22:11:59,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-23 22:11:59,128 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-23 22:11:59,128 INFO L153 SettingsManager]: * Use SBE=true [2025-01-23 22:11:59,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-23 22:11:59,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-23 22:11:59,129 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-23 22:11:59,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-23 22:11:59,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-23 22:11:59,130 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-23 22:11:59,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-23 22:11:59,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 22:11:59,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-23 22:11:59,131 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-23 22:11:59,132 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 -> eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 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 -> NECESSARY_AND_SUFFICIENT [2025-01-23 22:11:59,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-23 22:11:59,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-23 22:11:59,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-23 22:11:59,401 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-23 22:11:59,402 INFO L274 PluginConnector]: CDTParser initialized [2025-01-23 22:11:59,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread/reorder_2.i [2025-01-23 22:12:00,562 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/f1b142d99/e94e145bdc6541fcaef8b2543bdc5a1f/FLAGfb21d4df3 [2025-01-23 22:12:00,814 INFO L384 CDTParser]: Found 1 translation units. [2025-01-23 22:12:00,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread/reorder_2.i [2025-01-23 22:12:00,833 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/f1b142d99/e94e145bdc6541fcaef8b2543bdc5a1f/FLAGfb21d4df3 [2025-01-23 22:12:00,846 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/f1b142d99/e94e145bdc6541fcaef8b2543bdc5a1f [2025-01-23 22:12:00,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-23 22:12:00,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-23 22:12:00,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-23 22:12:00,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-23 22:12:00,853 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-23 22:12:00,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 10:12:00" (1/1) ... [2025-01-23 22:12:00,854 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de5d8b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:00, skipping insertion in model container [2025-01-23 22:12:00,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 10:12:00" (1/1) ... [2025-01-23 22:12:00,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-23 22:12:01,208 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/reorder_2.i[60219,60232] [2025-01-23 22:12:01,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 22:12:01,217 INFO L200 MainTranslator]: Completed pre-run [2025-01-23 22:12:01,299 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/reorder_2.i[60219,60232] [2025-01-23 22:12:01,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 22:12:01,372 INFO L204 MainTranslator]: Completed translation [2025-01-23 22:12:01,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01 WrapperNode [2025-01-23 22:12:01,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-23 22:12:01,375 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-23 22:12:01,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-23 22:12:01,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-23 22:12:01,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,411 INFO L138 Inliner]: procedures = 372, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2025-01-23 22:12:01,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-23 22:12:01,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-23 22:12:01,412 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-23 22:12:01,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-23 22:12:01,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,422 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,428 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,429 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-23 22:12:01,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-23 22:12:01,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-23 22:12:01,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-23 22:12:01,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (1/1) ... [2025-01-23 22:12:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 22:12:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:01,458 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 22:12:01,461 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 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2025-01-23 22:12:01,477 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2025-01-23 22:12:01,477 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2025-01-23 22:12:01,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-01-23 22:12:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-23 22:12:01,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-23 22:12:01,479 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 22:12:01,589 INFO L234 CfgBuilder]: Building ICFG [2025-01-23 22:12:01,590 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-23 22:12:01,746 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-23 22:12:01,746 INFO L283 CfgBuilder]: Performing block encoding [2025-01-23 22:12:01,898 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-23 22:12:01,898 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-23 22:12:01,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:01 BoogieIcfgContainer [2025-01-23 22:12:01,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-23 22:12:01,900 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-23 22:12:01,900 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-23 22:12:01,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-23 22:12:01,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 10:12:00" (1/3) ... [2025-01-23 22:12:01,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53103c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 10:12:01, skipping insertion in model container [2025-01-23 22:12:01,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:01" (2/3) ... [2025-01-23 22:12:01,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53103c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 10:12:01, skipping insertion in model container [2025-01-23 22:12:01,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:01" (3/3) ... [2025-01-23 22:12:01,905 INFO L128 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2025-01-23 22:12:01,914 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-23 22:12:01,916 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG reorder_2.i that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-01-23 22:12:01,916 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-23 22:12:01,949 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-01-23 22:12:01,975 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 22:12:01,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-23 22:12:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:01,980 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 22:12:01,982 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 22:12:02,058 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-23 22:12:02,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread1of1ForFork1 ======== [2025-01-23 22:12:02,073 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;@49c9803f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 22:12:02,073 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-23 22:12:02,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:02,170 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:02,170 INFO L139 ounterexampleChecker]: Examining path program with hash -562282566, occurence #1 [2025-01-23 22:12:02,170 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:02,170 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:02,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2060144042, now seen corresponding path program 1 times [2025-01-23 22:12:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 22:12:02,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682146667] [2025-01-23 22:12:02,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 22:12:02,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-23 22:12:02,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-23 22:12:02,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:02,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 22:12:02,473 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 22:12:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 22:12:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682146667] [2025-01-23 22:12:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682146667] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 22:12:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 22:12:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-23 22:12:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83233079] [2025-01-23 22:12:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 22:12:02,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-23 22:12:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 22:12:02,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-23 22:12:02,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-23 22:12:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:02,498 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 22:12:02,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 22:12:02,499 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:02,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-23 22:12:02,655 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:02,655 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:02,655 INFO L139 ounterexampleChecker]: Examining path program with hash -2109325108, occurence #1 [2025-01-23 22:12:02,655 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:02,655 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:02,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1339779261, now seen corresponding path program 1 times [2025-01-23 22:12:02,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 22:12:02,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429327982] [2025-01-23 22:12:02,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 22:12:02,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-23 22:12:02,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-23 22:12:02,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:02,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 22:12:02,875 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 22:12:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 22:12:02,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429327982] [2025-01-23 22:12:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429327982] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 22:12:02,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 22:12:02,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-23 22:12:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193558596] [2025-01-23 22:12:02,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 22:12:02,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-23 22:12:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 22:12:02,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-23 22:12:02,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-23 22:12:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:02,877 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 22:12:02,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 22:12:02,877 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:02,877 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 22:12:03,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-23 22:12:03,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:03,055 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:03,055 INFO L139 ounterexampleChecker]: Examining path program with hash -2037896888, occurence #1 [2025-01-23 22:12:03,055 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:03,055 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:03,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash 875925956, now seen corresponding path program 1 times [2025-01-23 22:12:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 22:12:03,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504294592] [2025-01-23 22:12:03,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 22:12:03,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-23 22:12:03,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-23 22:12:03,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:03,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 22:12:03,073 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-23 22:12:03,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-23 22:12:03,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-23 22:12:03,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:03,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 22:12:03,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-23 22:12:03,103 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-23 22:12:03,104 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-23 22:12:03,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-23 22:12:03,110 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-01-23 22:12:03,112 INFO L319 ceAbstractionStarter]: Result for error location checkThreadThread1of1ForFork1 was UNSAFE (1/2) [2025-01-23 22:12:03,145 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-23 22:12:03,146 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-23 22:12:03,154 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 22:12:03,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 10:12:03 BasicIcfg [2025-01-23 22:12:03,155 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-23 22:12:03,155 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-23 22:12:03,155 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-23 22:12:03,156 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-23 22:12:03,156 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:01" (3/4) ... [2025-01-23 22:12:03,157 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-23 22:12:03,158 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-23 22:12:03,159 INFO L158 Benchmark]: Toolchain (without parser) took 2309.58ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 57.0MB in the beginning and 41.7MB in the end (delta: 15.3MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. [2025-01-23 22:12:03,159 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 83.9MB. Free memory was 61.6MB in the beginning and 61.6MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:03,159 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.03ms. Allocated memory is still 83.9MB. Free memory was 56.7MB in the beginning and 52.9MB in the end (delta: 3.8MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. [2025-01-23 22:12:03,159 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.06ms. Allocated memory is still 83.9MB. Free memory was 52.9MB in the beginning and 50.7MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:03,159 INFO L158 Benchmark]: Boogie Preprocessor took 18.78ms. Allocated memory is still 83.9MB. Free memory was 50.7MB in the beginning and 49.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:03,160 INFO L158 Benchmark]: RCFGBuilder took 467.91ms. Allocated memory is still 83.9MB. Free memory was 49.1MB in the beginning and 39.9MB in the end (delta: 9.1MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2025-01-23 22:12:03,160 INFO L158 Benchmark]: TraceAbstraction took 1254.86ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 39.5MB in the beginning and 41.7MB in the end (delta: -2.2MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2025-01-23 22:12:03,160 INFO L158 Benchmark]: Witness Printer took 2.50ms. Allocated memory is still 117.4MB. Free memory was 41.7MB in the beginning and 41.7MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:03,161 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 83.9MB. Free memory was 61.6MB in the beginning and 61.6MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.03ms. Allocated memory is still 83.9MB. Free memory was 56.7MB in the beginning and 52.9MB in the end (delta: 3.8MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.06ms. Allocated memory is still 83.9MB. Free memory was 52.9MB in the beginning and 50.7MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.78ms. Allocated memory is still 83.9MB. Free memory was 50.7MB in the beginning and 49.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 467.91ms. Allocated memory is still 83.9MB. Free memory was 49.1MB in the beginning and 39.9MB in the end (delta: 9.1MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1254.86ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 39.5MB in the beginning and 41.7MB in the end (delta: -2.2MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. * Witness Printer took 2.50ms. Allocated memory is still 117.4MB. Free memory was 41.7MB in the beginning and 41.7MB in the end (delta: 2.6kB). There was no memory consumed. 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: 694, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 34, dependent conditional: 22, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 14, dependent conditional: 2, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 498, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 498, independent: 480, independent conditional: 0, independent unconditional: 480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 172, independent: 54, independent conditional: 0, independent unconditional: 54, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 674, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 498, unknown conditional: 0, unknown unconditional: 498] , Statistics on independence cache: Total cache size (in pairs): 498, Positive cache size: 486, Positive conditional cache size: 0, Positive unconditional cache size: 486, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 137, Maximal queried relation: 1, Independence queries for same thread: 21, Persistent sets #1 benchmarks: Persistent set computation time: 0.2s, Number of persistent set computation: 64, Number of trivial persistent sets: 40, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 537, independent: 525, independent conditional: 0, independent unconditional: 525, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 694, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 34, dependent conditional: 22, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 14, dependent conditional: 2, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 498, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 498, independent: 480, independent conditional: 0, independent unconditional: 480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 172, independent: 54, independent conditional: 0, independent unconditional: 54, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 674, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 498, unknown conditional: 0, unknown unconditional: 498] , Statistics on independence cache: Total cache size (in pairs): 498, Positive cache size: 486, Positive conditional cache size: 0, Positive unconditional cache size: 486, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 137, Maximal queried relation: 1, Independence queries for same thread: 21 - UnprovableResult [Line: 1307]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of sscanf at line 1253. Possible FailurePath: [L1238] 0 static int iSet = 2; [L1239] 0 static int iCheck = 2; [L1240] 0 static int a = 0; [L1241] 0 static int b = 0; [L1247] 0 int i, err; [L1248] COND TRUE 0 argc != 1 [L1249] COND FALSE 0 !(argc != 3) [L1257] COND FALSE 0 !(iSet > 100000 || iCheck > 100000) [L1260] 0 pthread_t setPool[iSet]; [L1261] 0 pthread_t checkPool[iCheck]; [L1262] 0 i = 0 VAL [\at(argc, Pre)=3, \at(argv, Pre)={49:50}, a=0, argc=3, b=0, checkPool={5:0}, i=0, iCheck=2, iSet=1, setPool={6:0}] [L1262] COND TRUE 0 i < iSet [L1263] EXPR, FCALL, FORK 0 pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\at(argc, Pre)=3, \at(argv, Pre)={49:50}, \at(param, Pre)={0:0}, a=0, argc=3, b=0, checkPool={5:0}, i=0, iCheck=2, iSet=1, setPool={6:0}] [L1291] 1 a = 1 VAL [\at(param, Pre)={0:0}, a=1, b=0, iCheck=2, iSet=1, param={0:0}] [L1263] EXPR 0 err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) [L1263] COND FALSE 0 !(0 != (err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)))) [L1262] 0 i++ VAL [\at(argc, Pre)=3, \at(argv, Pre)={49:50}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={5:0}, err=0, i=1, iCheck=2, iSet=1, param={0:0}, setPool={6:0}] [L1262] COND FALSE 0 !(i < iSet) [L1268] 0 i = 0 VAL [\at(argc, Pre)=3, \at(argv, Pre)={49:50}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={5:0}, err=0, i=0, iCheck=2, iSet=1, param={0:0}, setPool={6:0}] [L1268] COND TRUE 0 i < iCheck [L1269-L1270] FCALL, FORK 0 pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0)) VAL [\at(argc, Pre)=3, \at(argv, Pre)={49:50}, \at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={5:0}, err=0, i=0, iCheck=2, iSet=1, param={0:0}, setPool={6:0}] [L1300] 2 int la = a; VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=2, iSet=1, la=1, param={0:0}, param={0:0}] [L1303] 2 int lb = b; VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=2, iSet=1, la=1, lb=0, param={0:0}, param={0:0}] [L1305] COND TRUE 2 ! ((la == 0 && lb == 0) || (la == 1 && lb == -1)) [L1307] 2 reach_error() VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=2, iSet=1, la=1, lb=0, param={0:0}, param={0:0}] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: checkThreadThread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.4s, 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: 11, 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, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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]: 0, ConditionCalculationTime [ms]: 0, ConditionCalculations: 0, QuantifiedConditions: 0, TraceChecks: 0, UnknownTraceChecks: 0, UnsatisfiedConditions: 0, ImperfectProofs: 0 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-01-23 22:12:03,173 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/reorder_2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Bitvector.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 eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NECESSARY_AND_SUFFICIENT --- Real Ultimate output --- This is Ultimate 0.3.0-dev-ebd4107-m [2025-01-23 22:12:05,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-23 22:12:05,200 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Bitvector.epf [2025-01-23 22:12:05,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-23 22:12:05,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-23 22:12:05,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-23 22:12:05,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-23 22:12:05,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-23 22:12:05,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-23 22:12:05,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Use SBE=true [2025-01-23 22:12:05,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-23 22:12:05,227 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-01-23 22:12:05,229 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-23 22:12:05,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-23 22:12:05,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 22:12:05,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Refinement strategy for commutativity condition synthesis=FOX [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-23 22:12:05,231 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-01-23 22:12:05,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-23 22:12:05,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-23 22:12:05,232 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-23 22:12:05,232 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-23 22:12:05,232 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 -> eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 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 -> NECESSARY_AND_SUFFICIENT [2025-01-23 22:12:05,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-23 22:12:05,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-23 22:12:05,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-23 22:12:05,480 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-23 22:12:05,480 INFO L274 PluginConnector]: CDTParser initialized [2025-01-23 22:12:05,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread/reorder_2.i [2025-01-23 22:12:06,687 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/7cd12f5a9/d5b4e862a6aa4b4087e47b26b0bf23e0/FLAGc8a85ab64 [2025-01-23 22:12:06,882 INFO L384 CDTParser]: Found 1 translation units. [2025-01-23 22:12:06,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread/reorder_2.i [2025-01-23 22:12:06,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/7cd12f5a9/d5b4e862a6aa4b4087e47b26b0bf23e0/FLAGc8a85ab64 [2025-01-23 22:12:07,234 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/7cd12f5a9/d5b4e862a6aa4b4087e47b26b0bf23e0 [2025-01-23 22:12:07,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-23 22:12:07,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-23 22:12:07,243 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-23 22:12:07,243 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-23 22:12:07,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-23 22:12:07,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647e3edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07, skipping insertion in model container [2025-01-23 22:12:07,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,270 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-23 22:12:07,604 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/reorder_2.i[60219,60232] [2025-01-23 22:12:07,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 22:12:07,614 INFO L200 MainTranslator]: Completed pre-run [2025-01-23 22:12:07,679 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/reorder_2.i[60219,60232] [2025-01-23 22:12:07,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 22:12:07,748 INFO L204 MainTranslator]: Completed translation [2025-01-23 22:12:07,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07 WrapperNode [2025-01-23 22:12:07,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-23 22:12:07,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-23 22:12:07,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-23 22:12:07,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-23 22:12:07,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,791 INFO L138 Inliner]: procedures = 375, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 107 [2025-01-23 22:12:07,791 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-23 22:12:07,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-23 22:12:07,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-23 22:12:07,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-23 22:12:07,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,811 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-23 22:12:07,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-23 22:12:07,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-23 22:12:07,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-23 22:12:07,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (1/1) ... [2025-01-23 22:12:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 22:12:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:07,853 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 22:12:07,855 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 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-23 22:12:07,874 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2025-01-23 22:12:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2025-01-23 22:12:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-23 22:12:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2025-01-23 22:12:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2025-01-23 22:12:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-23 22:12:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-23 22:12:07,875 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 22:12:07,971 INFO L234 CfgBuilder]: Building ICFG [2025-01-23 22:12:07,972 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-23 22:12:08,124 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-23 22:12:08,124 INFO L283 CfgBuilder]: Performing block encoding [2025-01-23 22:12:08,286 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-23 22:12:08,286 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-23 22:12:08,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:08 BoogieIcfgContainer [2025-01-23 22:12:08,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-23 22:12:08,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-23 22:12:08,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-23 22:12:08,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-23 22:12:08,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 10:12:07" (1/3) ... [2025-01-23 22:12:08,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613b62d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 10:12:08, skipping insertion in model container [2025-01-23 22:12:08,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 10:12:07" (2/3) ... [2025-01-23 22:12:08,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613b62d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 10:12:08, skipping insertion in model container [2025-01-23 22:12:08,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:08" (3/3) ... [2025-01-23 22:12:08,295 INFO L128 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2025-01-23 22:12:08,314 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-23 22:12:08,316 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG reorder_2.i that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-01-23 22:12:08,316 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-23 22:12:08,349 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-01-23 22:12:08,376 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 22:12:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-23 22:12:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:08,381 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 22:12:08,385 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 22:12:08,441 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-23 22:12:08,453 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread1of1ForFork1 ======== [2025-01-23 22:12:08,461 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;@56a96e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 22:12:08,461 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-23 22:12:08,609 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:08,609 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:08,610 INFO L139 ounterexampleChecker]: Examining path program with hash -562282566, occurence #1 [2025-01-23 22:12:08,610 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:08,610 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:08,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 529937236, now seen corresponding path program 1 times [2025-01-23 22:12:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-23 22:12:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635589112] [2025-01-23 22:12:08,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:08,641 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 22:12:08,643 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 22:12:08,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-23 22:12:08,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-23 22:12:08,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:08,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 22:12:08,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-23 22:12:08,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 22:12:08,780 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 22:12:08,780 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-23 22:12:08,781 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-23 22:12:08,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635589112] [2025-01-23 22:12:08,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635589112] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 22:12:08,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 22:12:08,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-23 22:12:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754181818] [2025-01-23 22:12:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 22:12:08,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-23 22:12:08,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-23 22:12:08,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-23 22:12:08,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-23 22:12:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:08,796 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 22:12:08,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 22:12:08,797 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:08,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-23 22:12:09,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:09,193 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:09,193 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:09,194 INFO L139 ounterexampleChecker]: Examining path program with hash -105130432, occurence #1 [2025-01-23 22:12:09,194 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:09,194 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:09,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash 287987011, now seen corresponding path program 1 times [2025-01-23 22:12:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-23 22:12:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976477910] [2025-01-23 22:12:09,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:09,200 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 22:12:09,201 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 22:12:09,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-23 22:12:09,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-23 22:12:09,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:09,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 22:12:09,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-23 22:12:09,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 22:12:09,356 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 22:12:09,360 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-23 22:12:09,360 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-23 22:12:09,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976477910] [2025-01-23 22:12:09,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976477910] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 22:12:09,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 22:12:09,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-23 22:12:09,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951936712] [2025-01-23 22:12:09,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 22:12:09,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-23 22:12:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-23 22:12:09,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-23 22:12:09,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-01-23 22:12:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:09,363 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 22:12:09,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 22:12:09,363 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:09,363 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 22:12:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-23 22:12:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 22:12:09,564 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 22:12:09,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:09,762 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-23 22:12:09,762 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-23 22:12:09,762 INFO L139 ounterexampleChecker]: Examining path program with hash 400405009, occurence #1 [2025-01-23 22:12:09,762 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-23 22:12:09,762 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-23 22:12:09,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 22:12:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash 202760196, now seen corresponding path program 1 times [2025-01-23 22:12:09,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-23 22:12:09,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200193211] [2025-01-23 22:12:09,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 22:12:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 22:12:09,767 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 22:12:09,768 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 22:12:09,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-23 22:12:09,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-23 22:12:09,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:09,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 22:12:09,832 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-23 22:12:09,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-23 22:12:09,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-23 22:12:09,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 22:12:09,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 22:12:09,884 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-01-23 22:12:09,884 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-23 22:12:09,888 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-23 22:12:09,899 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 22:12:10,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 22:12:10,099 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-01-23 22:12:10,100 INFO L319 ceAbstractionStarter]: Result for error location checkThreadThread1of1ForFork1 was UNSAFE (1/2) [2025-01-23 22:12:10,145 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-23 22:12:10,145 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-23 22:12:10,153 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 22:12:10,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 10:12:10 BasicIcfg [2025-01-23 22:12:10,154 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-23 22:12:10,155 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-23 22:12:10,155 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-23 22:12:10,156 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-23 22:12:10,156 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 10:12:08" (3/4) ... [2025-01-23 22:12:10,157 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-23 22:12:10,158 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-23 22:12:10,159 INFO L158 Benchmark]: Toolchain (without parser) took 2916.24ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 57.9MB in the beginning and 81.5MB in the end (delta: -23.6MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2025-01-23 22:12:10,159 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 34.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:10,159 INFO L158 Benchmark]: CACSL2BoogieTranslator took 506.95ms. Allocated memory is still 83.9MB. Free memory was 57.6MB in the beginning and 51.5MB in the end (delta: 6.1MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. [2025-01-23 22:12:10,160 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.50ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 49.3MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:10,160 INFO L158 Benchmark]: Boogie Preprocessor took 35.51ms. Allocated memory is still 83.9MB. Free memory was 49.3MB in the beginning and 47.5MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-23 22:12:10,160 INFO L158 Benchmark]: RCFGBuilder took 458.66ms. Allocated memory is still 83.9MB. Free memory was 47.5MB in the beginning and 31.1MB in the end (delta: 16.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-01-23 22:12:10,160 INFO L158 Benchmark]: TraceAbstraction took 1866.44ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 30.7MB in the beginning and 81.5MB in the end (delta: -50.8MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2025-01-23 22:12:10,161 INFO L158 Benchmark]: Witness Printer took 2.78ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 81.5MB in the end (delta: 4.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 22:12:10,161 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 34.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 506.95ms. Allocated memory is still 83.9MB. Free memory was 57.6MB in the beginning and 51.5MB in the end (delta: 6.1MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.50ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 49.3MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.51ms. Allocated memory is still 83.9MB. Free memory was 49.3MB in the beginning and 47.5MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 458.66ms. Allocated memory is still 83.9MB. Free memory was 47.5MB in the beginning and 31.1MB in the end (delta: 16.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 1866.44ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 30.7MB in the beginning and 81.5MB in the end (delta: -50.8MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * Witness Printer took 2.78ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 81.5MB in the end (delta: 4.2kB). There was no memory consumed. 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: 694, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 34, dependent conditional: 22, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 14, dependent conditional: 2, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 498, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 498, independent: 480, independent conditional: 0, independent unconditional: 480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 238, independent: 79, independent conditional: 0, independent unconditional: 79, dependent: 158, dependent conditional: 0, dependent unconditional: 158, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 674, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 498, unknown conditional: 0, unknown unconditional: 498] , Statistics on independence cache: Total cache size (in pairs): 498, Positive cache size: 486, Positive conditional cache size: 0, Positive unconditional cache size: 486, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 137, Maximal queried relation: 1, Independence queries for same thread: 21, Persistent sets #1 benchmarks: Persistent set computation time: 0.3s, Number of persistent set computation: 64, Number of trivial persistent sets: 40, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 537, independent: 525, independent conditional: 0, independent unconditional: 525, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 694, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 34, dependent conditional: 22, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 673, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 13, dependent conditional: 1, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 135, independent unconditional: 525, dependent: 14, dependent conditional: 2, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 674, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 498, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 498, independent: 480, independent conditional: 0, independent unconditional: 480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 18, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 238, independent: 79, independent conditional: 0, independent unconditional: 79, dependent: 158, dependent conditional: 0, dependent unconditional: 158, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 674, independent: 174, independent conditional: 0, independent unconditional: 174, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 498, unknown conditional: 0, unknown unconditional: 498] , Statistics on independence cache: Total cache size (in pairs): 498, Positive cache size: 486, Positive conditional cache size: 0, Positive unconditional cache size: 486, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 137, Maximal queried relation: 1, Independence queries for same thread: 21 - UnprovableResult [Line: 1307]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of sscanf at line 1253. Possible FailurePath: [L1238] 0 static int iSet = 2; [L1239] 0 static int iCheck = 2; [L1240] 0 static int a = 0; [L1241] 0 static int b = 0; [L1247] 0 int i, err; [L1248] COND TRUE 0 argc != 1 [L1249] COND FALSE 0 !(argc != 3) [L1257] COND FALSE 0 !(iSet > 100000 || iCheck > 100000) [L1260] 0 pthread_t setPool[iSet]; [L1261] 0 pthread_t checkPool[iCheck]; [L1262] 0 i = 0 VAL [\at(argc, Pre)=3, \at(argv, Pre)={0:0}, a=0, argc=3, b=0, checkPool={3:0}, i=0, iCheck=1, iSet=1, setPool={35:0}] [L1262] COND TRUE 0 i < iSet [L1263] EXPR, FCALL, FORK 0 pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) VAL [\at(argc, Pre)=3, \at(argv, Pre)={0:0}, \at(param, Pre)={0:0}, a=0, argc=3, b=0, checkPool={3:0}, i=0, iCheck=1, iSet=1, setPool={35:0}] [L1291] 1 a = 1 VAL [\at(param, Pre)={0:0}, a=1, b=0, iCheck=1, iSet=1, param={0:0}] [L1263] EXPR 0 err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)) [L1263] COND FALSE 0 !(0 != (err = pthread_create(&setPool[i], ((void *)0), &setThread, ((void *)0)))) [L1262] 0 i++ VAL [\at(argc, Pre)=3, \at(argv, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={3:0}, err=0, i=1, iCheck=1, iSet=1, param={0:0}, setPool={35:0}] [L1262] COND FALSE 0 !(i < iSet) [L1268] 0 i = 0 VAL [\at(argc, Pre)=3, \at(argv, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={3:0}, err=0, i=0, iCheck=1, iSet=1, param={0:0}, setPool={35:0}] [L1268] COND TRUE 0 i < iCheck [L1269-L1270] FCALL, FORK 0 pthread_create(&checkPool[i], ((void *)0), &checkThread, ((void *)0)) VAL [\at(argc, Pre)=3, \at(argv, Pre)={0:0}, \at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, argc=3, b=0, checkPool={3:0}, err=0, i=0, iCheck=1, iSet=1, param={0:0}, setPool={35:0}] [L1300] 2 int la = a; VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=1, iSet=1, la=1, param={0:0}, param={0:0}] [L1303] 2 int lb = b; VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=1, iSet=1, la=1, lb=0, param={0:0}, param={0:0}] [L1305] COND TRUE 2 ! ((la == 0 && lb == 0) || (la == 1 && lb == -1)) [L1307] 2 reach_error() VAL [\at(param, Pre)={0:0}, \at(param, Pre)={0:0}, a=1, b=0, iCheck=1, iSet=1, la=1, lb=0, param={0:0}, param={0:0}] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: checkThreadThread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.5s, 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: 11, 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 139 SizeOfPredicates, 4 NumberOfNonLiveVariables, 125 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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]: 0, ConditionCalculationTime [ms]: 0, ConditionCalculations: 0, QuantifiedConditions: 0, TraceChecks: 0, UnknownTraceChecks: 0, UnsatisfiedConditions: 0, ImperfectProofs: 0 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-01-23 22:12:10,175 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 Result: UNKNOWN: Overapproximated counterexample