./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.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/goblint-regression/28-race_reach_84-list2_racing2.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 f70125267ee7251a74a40ef1ba0ea3ced14d0fe45e7a9ea5a666e1eecab0c01c --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 [2025-01-24 01:13:40,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-24 01:13:40,766 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-01-24 01:13:40,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-24 01:13:40,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-24 01:13:40,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-24 01:13:40,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-24 01:13:40,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-24 01:13:40,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-24 01:13:40,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-24 01:13:40,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * Use SBE=true [2025-01-24 01:13:40,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-24 01:13:40,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-24 01:13:40,785 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-24 01:13:40,785 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-24 01:13:40,786 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-24 01:13:40,786 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-24 01:13:40,786 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 -> f70125267ee7251a74a40ef1ba0ea3ced14d0fe45e7a9ea5a666e1eecab0c01c 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 [2025-01-24 01:13:41,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-24 01:13:41,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-24 01:13:41,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-24 01:13:41,052 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-24 01:13:41,052 INFO L274 PluginConnector]: CDTParser initialized [2025-01-24 01:13:41,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i [2025-01-24 01:13:42,237 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/65a677f49/e6a3c85a1055448f82740fcd6ea88998/FLAG0c0b58556 [2025-01-24 01:13:42,512 INFO L384 CDTParser]: Found 1 translation units. [2025-01-24 01:13:42,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/goblint-regression/28-race_reach_84-list2_racing2.i [2025-01-24 01:13:42,529 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/65a677f49/e6a3c85a1055448f82740fcd6ea88998/FLAG0c0b58556 [2025-01-24 01:13:42,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/65a677f49/e6a3c85a1055448f82740fcd6ea88998 [2025-01-24 01:13:42,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-24 01:13:42,824 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-24 01:13:42,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-24 01:13:42,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-24 01:13:42,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-24 01:13:42,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 01:13:42" (1/1) ... [2025-01-24 01:13:42,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d05e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:42, skipping insertion in model container [2025-01-24 01:13:42,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 01:13:42" (1/1) ... [2025-01-24 01:13:42,854 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-24 01:13:43,088 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/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2025-01-24 01:13:43,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-24 01:13:43,120 INFO L200 MainTranslator]: Completed pre-run [2025-01-24 01:13:43,196 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/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2025-01-24 01:13:43,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-24 01:13:43,264 INFO L204 MainTranslator]: Completed translation [2025-01-24 01:13:43,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43 WrapperNode [2025-01-24 01:13:43,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-24 01:13:43,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-24 01:13:43,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-24 01:13:43,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-24 01:13:43,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,312 INFO L138 Inliner]: procedures = 280, calls = 98, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 385 [2025-01-24 01:13:43,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-24 01:13:43,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-24 01:13:43,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-24 01:13:43,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-24 01:13:43,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,353 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-24 01:13:43,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-24 01:13:43,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-24 01:13:43,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-24 01:13:43,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (1/1) ... [2025-01-24 01:13:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-24 01:13:43,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-24 01:13:43,397 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) [2025-01-24 01:13:43,401 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 [2025-01-24 01:13:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-24 01:13:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2025-01-24 01:13:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-01-24 01:13:43,417 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-01-24 01:13:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-24 01:13:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-01-24 01:13:43,418 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2025-01-24 01:13:43,418 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-01-24 01:13:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-24 01:13:43,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-24 01:13:43,420 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-24 01:13:43,565 INFO L234 CfgBuilder]: Building ICFG [2025-01-24 01:13:43,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-24 01:13:43,979 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-24 01:13:43,980 INFO L283 CfgBuilder]: Performing block encoding [2025-01-24 01:13:44,217 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-24 01:13:44,218 INFO L312 CfgBuilder]: Removed 13 assume(true) statements. [2025-01-24 01:13:44,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 01:13:44 BoogieIcfgContainer [2025-01-24 01:13:44,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-24 01:13:44,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-24 01:13:44,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-24 01:13:44,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-24 01:13:44,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 01:13:42" (1/3) ... [2025-01-24 01:13:44,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bd4848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 01:13:44, skipping insertion in model container [2025-01-24 01:13:44,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:13:43" (2/3) ... [2025-01-24 01:13:44,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bd4848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 01:13:44, skipping insertion in model container [2025-01-24 01:13:44,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 01:13:44" (3/3) ... [2025-01-24 01:13:44,226 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_84-list2_racing2.i [2025-01-24 01:13:44,237 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-24 01:13:44,238 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_84-list2_racing2.i that has 4 procedures, 108 locations, 1 initial locations, 19 loop locations, and 2 error locations. [2025-01-24 01:13:44,238 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-24 01:13:44,316 INFO L143 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2025-01-24 01:13:44,346 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:44,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-24 01:13:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-24 01:13:44,349 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) [2025-01-24 01:13:44,350 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 [2025-01-24 01:13:44,443 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-24 01:13:44,454 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of1ForFork1 ======== [2025-01-24 01:13:44,460 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;@5f0f6fdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:44,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-24 01:13:46,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-24 01:13:46,533 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-24 01:13:46,533 INFO L139 ounterexampleChecker]: Examining path program with hash 890668365, occurence #1 [2025-01-24 01:13:46,533 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-24 01:13:46,533 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-24 01:13:46,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-24 01:13:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1080512409, now seen corresponding path program 1 times [2025-01-24 01:13:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-24 01:13:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414329208] [2025-01-24 01:13:46,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-24 01:13:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-24 01:13:46,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-24 01:13:46,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-24 01:13:46,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:13:46,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-24 01:13:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-24 01:13:46,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-24 01:13:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414329208] [2025-01-24 01:13:46,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414329208] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-24 01:13:46,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-24 01:13:46,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-24 01:13:46,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430273060] [2025-01-24 01:13:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-24 01:13:46,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-24 01:13:46,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-24 01:13:46,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-24 01:13:46,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-24 01:13:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:13:46,953 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-24 01:13:46,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2025-01-24 01:13:46,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:13:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-24 01:13:48,641 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-24 01:13:48,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-24 01:13:48,645 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-24 01:13:48,646 INFO L319 ceAbstractionStarter]: Result for error location t2_funThread1of1ForFork1 was SAFE (1/3) [2025-01-24 01:13:48,649 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:48,650 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-24 01:13:48,650 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2025-01-24 01:13:48,651 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;@5f0f6fdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:48,651 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-24 01:13:48,654 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-01-24 01:13:48,655 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-24 01:13:48,655 INFO L139 ounterexampleChecker]: Examining path program with hash 953285733, occurence #1 [2025-01-24 01:13:48,655 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-24 01:13:48,655 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-24 01:13:48,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-24 01:13:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1941841132, now seen corresponding path program 1 times [2025-01-24 01:13:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-24 01:13:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521407611] [2025-01-24 01:13:48,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-24 01:13:48,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-24 01:13:48,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-24 01:13:48,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-24 01:13:48,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:13:48,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-24 01:13:48,704 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-24 01:13:48,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-24 01:13:48,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-24 01:13:48,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:13:48,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-24 01:13:48,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-24 01:13:48,770 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-24 01:13:48,770 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-01-24 01:13:48,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-01-24 01:13:48,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-01-24 01:13:48,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-24 01:13:48,773 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-01-24 01:13:48,773 INFO L319 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN,UNKNOWN (2/3) [2025-01-24 01:13:48,774 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-01-24 01:13:48,774 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-01-24 01:13:48,818 INFO L143 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2025-01-24 01:13:48,820 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:48,841 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-24 01:13:48,841 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t3_funThread1of2ForFork2 ======== [2025-01-24 01:13:48,842 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;@5f0f6fdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:13:48,842 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-24 01:14:02,286 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-24 01:14:02,286 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-24 01:14:02,287 INFO L139 ounterexampleChecker]: Examining path program with hash -1265269851, occurence #1 [2025-01-24 01:14:02,287 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-24 01:14:02,287 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-24 01:14:02,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-24 01:14:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash -18908468, now seen corresponding path program 1 times [2025-01-24 01:14:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-24 01:14:02,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557592838] [2025-01-24 01:14:02,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-24 01:14:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-24 01:14:02,317 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-01-24 01:14:02,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-01-24 01:14:02,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:14:02,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-24 01:14:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-24 01:14:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-24 01:14:02,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557592838] [2025-01-24 01:14:02,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557592838] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-24 01:14:02,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-24 01:14:02,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-24 01:14:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580374156] [2025-01-24 01:14:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-24 01:14:02,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-24 01:14:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-24 01:14:02,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-24 01:14:02,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-24 01:14:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:14:02,402 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-24 01:14:02,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 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) [2025-01-24 01:14:02,402 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:27,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-24 01:17:27,939 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-24 01:17:27,939 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-24 01:17:27,939 INFO L139 ounterexampleChecker]: Examining path program with hash -1743504070, occurence #1 [2025-01-24 01:17:27,939 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-24 01:17:27,939 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-24 01:17:27,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-24 01:17:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1695847140, now seen corresponding path program 1 times [2025-01-24 01:17:27,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-24 01:17:27,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498955424] [2025-01-24 01:17:27,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-24 01:17:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-24 01:17:27,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 109 statements into 1 equivalence classes. [2025-01-24 01:17:28,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 109 of 109 statements. [2025-01-24 01:17:28,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:17:28,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-24 01:17:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-24 01:17:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-24 01:17:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498955424] [2025-01-24 01:17:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498955424] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-24 01:17:28,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-24 01:17:28,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-24 01:17:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427428592] [2025-01-24 01:17:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-24 01:17:28,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-24 01:17:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-24 01:17:28,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-24 01:17:28,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-24 01:17:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:28,250 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-24 01:17:28,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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) [2025-01-24 01:17:28,250 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:28,250 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-24 01:17:39,457 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-01-24 01:17:39,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-24 01:17:39,459 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-01-24 01:17:39,459 INFO L319 ceAbstractionStarter]: Result for error location t3_funThread1of2ForFork2 was SAFE (1/5) [2025-01-24 01:17:39,465 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:17:39,467 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-24 01:17:39,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of2ForFork1 ======== [2025-01-24 01:17:39,468 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;@5f0f6fdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-24 01:17:39,468 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-24 01:17:40,656 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-24 01:17:40,657 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-01-24 01:17:40,660 INFO L139 ounterexampleChecker]: Examining path program with hash 1500813330, occurence #1 [2025-01-24 01:17:40,660 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-01-24 01:17:40,660 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-01-24 01:17:40,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-24 01:17:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1453576384, now seen corresponding path program 1 times [2025-01-24 01:17:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-24 01:17:40,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49482613] [2025-01-24 01:17:40,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-24 01:17:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-24 01:17:40,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-24 01:17:40,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-24 01:17:40,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-24 01:17:40,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-24 01:17:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-24 01:17:40,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-24 01:17:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49482613] [2025-01-24 01:17:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49482613] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-24 01:17:40,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-24 01:17:40,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-24 01:17:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641489907] [2025-01-24 01:17:40,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-24 01:17:40,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-24 01:17:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-24 01:17:40,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-24 01:17:40,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-24 01:17:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-24 01:17:40,722 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-24 01:17:40,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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) [2025-01-24 01:17:40,722 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.