./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i --full-output --traceabstraction.dfs.order.used.in.por LOOP_LOCKSTEP --traceabstraction.additional.conditional.commutativity.checking COUNTEREXAMPLE --traceabstraction.criterion.for.conditional.commutativity.checking FORWARD -tc /storage/repos/ultimate/releaseScripts/default/benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b86fb0b7 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 f66a662852389d8ac1f64241746e843d67de7f5d7507051fb5c8e68404b785cd --traceabstraction.dfs.order.used.in.por LOOP_LOCKSTEP --traceabstraction.additional.conditional.commutativity.checking COUNTEREXAMPLE --traceabstraction.criterion.for.conditional.commutativity.checking FORWARD -tc /storage/repos/ultimate/releaseScripts/default/benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.conditional-comm-b86fb0b-m [2024-10-17 17:19:25,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-17 17:19:25,222 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-10-17 17:19:25,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-17 17:19:25,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-17 17:19:25,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-17 17:19:25,257 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-17 17:19:25,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-17 17:19:25,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-17 17:19:25,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-17 17:19:25,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-17 17:19:25,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-17 17:19:25,264 INFO L153 SettingsManager]: * Use SBE=true [2024-10-17 17:19:25,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-17 17:19:25,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-17 17:19:25,269 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-17 17:19:25,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-17 17:19:25,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-17 17:19:25,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-17 17:19:25,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-17 17:19:25,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-17 17:19:25,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-17 17:19:25,270 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-17 17:19:25,271 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-17 17:19:25,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-17 17:19:25,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-17 17:19:25,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-17 17:19:25,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-17 17:19:25,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-17 17:19:25,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-17 17:19:25,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-10-17 17:19:25,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-10-17 17:19:25,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-17 17:19:25,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-17 17:19:25,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-10-17 17:19:25,276 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-10-17 17:19:25,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f66a662852389d8ac1f64241746e843d67de7f5d7507051fb5c8e68404b785cd Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: DFS Order used in POR -> LOOP_LOCKSTEP Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional conditional commutativity checking -> COUNTEREXAMPLE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Criterion for conditional commutativity checking -> FORWARD [2024-10-17 17:19:25,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-17 17:19:25,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-17 17:19:25,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-17 17:19:25,590 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-17 17:19:25,591 INFO L274 PluginConnector]: CDTParser initialized [2024-10-17 17:19:25,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2024-10-17 17:19:27,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-17 17:19:27,316 INFO L384 CDTParser]: Found 1 translation units. [2024-10-17 17:19:27,317 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2024-10-17 17:19:27,356 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/d6172a329/81361e6d9edf4b6db6def4f35a2b8e25/FLAG2272850a0 [2024-10-17 17:19:27,616 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/d6172a329/81361e6d9edf4b6db6def4f35a2b8e25 [2024-10-17 17:19:27,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-17 17:19:27,620 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-17 17:19:27,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-17 17:19:27,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-17 17:19:27,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-17 17:19:27,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:19:27" (1/1) ... [2024-10-17 17:19:27,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2a556f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:27, skipping insertion in model container [2024-10-17 17:19:27,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:19:27" (1/1) ... [2024-10-17 17:19:27,683 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-17 17:19:28,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31308,31321] [2024-10-17 17:19:28,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-17 17:19:28,108 INFO L200 MainTranslator]: Completed pre-run [2024-10-17 17:19:28,174 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31308,31321] [2024-10-17 17:19:28,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-17 17:19:28,222 INFO L204 MainTranslator]: Completed translation [2024-10-17 17:19:28,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28 WrapperNode [2024-10-17 17:19:28,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-17 17:19:28,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-17 17:19:28,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-17 17:19:28,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-17 17:19:28,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,287 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2024-10-17 17:19:28,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-17 17:19:28,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-17 17:19:28,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-17 17:19:28,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-17 17:19:28,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-17 17:19:28,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-17 17:19:28,343 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-17 17:19:28,343 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-17 17:19:28,344 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (1/1) ... [2024-10-17 17:19:28,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-10-17 17:19:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-17 17:19:28,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-10-17 17:19:28,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-10-17 17:19:28,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-17 17:19:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-17 17:19:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-10-17 17:19:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-17 17:19:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-17 17:19:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-17 17:19:28,426 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-17 17:19:28,563 INFO L238 CfgBuilder]: Building ICFG [2024-10-17 17:19:28,565 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-17 17:19:28,937 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-17 17:19:28,937 INFO L287 CfgBuilder]: Performing block encoding [2024-10-17 17:19:29,206 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-17 17:19:29,207 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-17 17:19:29,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:19:29 BoogieIcfgContainer [2024-10-17 17:19:29,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-17 17:19:29,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-17 17:19:29,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-17 17:19:29,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-17 17:19:29,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:19:27" (1/3) ... [2024-10-17 17:19:29,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e61f06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:19:29, skipping insertion in model container [2024-10-17 17:19:29,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:19:28" (2/3) ... [2024-10-17 17:19:29,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e61f06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:19:29, skipping insertion in model container [2024-10-17 17:19:29,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:19:29" (3/3) ... [2024-10-17 17:19:29,222 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-1.i [2024-10-17 17:19:29,241 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-17 17:19:29,241 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-17 17:19:29,243 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-17 17:19:29,326 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-17 17:19:29,379 INFO L106 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-17 17:19:29,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-10-17 17:19:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-10-17 17:19:29,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-10-17 17:19:29,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2024-10-17 17:19:29,477 INFO L194 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-10-17 17:19:29,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-17 17:19:29,499 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2024-10-17 17:19:29,507 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;@3484764a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms], mConComChecker=COUNTEREXAMPLE, mConComCheckerCriterion=FORWARD, mConComCheckerTraceCheckMode=GENERATOR, mConComCheckerLimitedChecksCriterion=false, mConComCheckerCriterionLimit=1, mConComCheckerRandomProb=100, mConComCheckerRandomSeed=123, mConComCheckerConditionCriterion=false [2024-10-17 17:19:29,508 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-17 17:19:30,315 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-17 17:19:30,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-17 17:19:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1068284430, now seen corresponding path program 1 times [2024-10-17 17:19:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-17 17:19:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991144158] [2024-10-17 17:19:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-17 17:19:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-17 17:19:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-17 17:19:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-17 17:19:30,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-17 17:19:30,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991144158] [2024-10-17 17:19:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991144158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-17 17:19:30,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-17 17:19:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-17 17:19:30,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887258099] [2024-10-17 17:19:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-17 17:19:30,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-17 17:19:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-17 17:19:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-17 17:19:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-17 17:19:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-17 17:19:30,721 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-10-17 17:19:30,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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) [2024-10-17 17:19:30,722 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-10-17 17:19:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-17 17:19:30,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-17 17:19:30,793 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-17 17:19:30,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-17 17:19:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1732640034, now seen corresponding path program 1 times [2024-10-17 17:19:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-17 17:19:30,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148571869] [2024-10-17 17:19:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-17 17:19:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-17 17:19:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-17 17:19:30,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-17 17:19:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-17 17:19:30,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-17 17:19:30,964 INFO L332 BasicCegarLoop]: Counterexample is feasible [2024-10-17 17:19:30,967 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-17 17:19:30,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-17 17:19:30,983 INFO L414 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-17 17:19:30,985 INFO L312 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was UNSAFE (1/2) [2024-10-17 17:19:31,045 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-17 17:19:31,045 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-17 17:19:31,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:19:31 BasicIcfg [2024-10-17 17:19:31,049 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-17 17:19:31,050 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-17 17:19:31,050 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-17 17:19:31,050 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-17 17:19:31,051 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:19:29" (3/4) ... [2024-10-17 17:19:31,052 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-17 17:19:31,141 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/witness.graphml [2024-10-17 17:19:31,142 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-17 17:19:31,142 INFO L158 Benchmark]: Toolchain (without parser) took 3522.87ms. Allocated memory is still 163.6MB. Free memory was 135.3MB in the beginning and 61.0MB in the end (delta: 74.3MB). Peak memory consumption was 75.0MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,143 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 163.6MB. Free memory is still 139.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-17 17:19:31,143 INFO L158 Benchmark]: CACSL2BoogieTranslator took 602.21ms. Allocated memory is still 163.6MB. Free memory was 135.3MB in the beginning and 112.2MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,143 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.33ms. Allocated memory is still 163.6MB. Free memory was 112.2MB in the beginning and 110.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,144 INFO L158 Benchmark]: Boogie Preprocessor took 52.41ms. Allocated memory is still 163.6MB. Free memory was 110.1MB in the beginning and 108.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,144 INFO L158 Benchmark]: RCFGBuilder took 866.16ms. Allocated memory is still 163.6MB. Free memory was 108.0MB in the beginning and 57.7MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,144 INFO L158 Benchmark]: TraceAbstraction took 1836.42ms. Allocated memory is still 163.6MB. Free memory was 56.3MB in the beginning and 69.4MB in the end (delta: -13.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-17 17:19:31,145 INFO L158 Benchmark]: Witness Printer took 92.27ms. Allocated memory is still 163.6MB. Free memory was 69.4MB in the beginning and 61.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-10-17 17:19:31,146 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 163.6MB. Free memory is still 139.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 602.21ms. Allocated memory is still 163.6MB. Free memory was 135.3MB in the beginning and 112.2MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.33ms. Allocated memory is still 163.6MB. Free memory was 112.2MB in the beginning and 110.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.41ms. Allocated memory is still 163.6MB. Free memory was 110.1MB in the beginning and 108.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 866.16ms. Allocated memory is still 163.6MB. Free memory was 108.0MB in the beginning and 57.7MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1836.42ms. Allocated memory is still 163.6MB. Free memory was 56.3MB in the beginning and 69.4MB in the end (delta: -13.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 92.27ms. Allocated memory is still 163.6MB. Free memory was 69.4MB in the beginning and 61.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 336, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 27, dependent conditional: 23, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ ConditionTransformingIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 200, independent: 196, independent conditional: 0, independent unconditional: 196, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 200, independent: 190, independent conditional: 0, independent unconditional: 190, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 729, independent: 589, independent conditional: 0, independent unconditional: 589, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 317, independent: 113, independent conditional: 0, independent unconditional: 113, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 200, unknown conditional: 0, unknown unconditional: 200] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 196, Positive conditional cache size: 0, Positive unconditional cache size: 196, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 55, Maximal queried relation: 0, ConditionTransformingIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 200, independent: 196, independent conditional: 0, independent unconditional: 196, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 200, independent: 190, independent conditional: 0, independent unconditional: 190, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 729, independent: 589, independent conditional: 0, independent unconditional: 589, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 317, independent: 113, independent conditional: 0, independent unconditional: 113, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 200, unknown conditional: 0, unknown unconditional: 200] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 196, Positive conditional cache size: 0, Positive unconditional cache size: 196, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 55 ], Independence queries for same thread: 23, Persistent sets #1 benchmarks: Persistent set computation time: 0.8s, Number of persistent set computation: 28, Number of trivial persistent sets: 17, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 258, independent: 254, independent conditional: 0, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 336, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 27, dependent conditional: 23, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ ConditionTransformingIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 313, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 200, independent: 196, independent conditional: 0, independent unconditional: 196, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 200, independent: 190, independent conditional: 0, independent unconditional: 190, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 729, independent: 589, independent conditional: 0, independent unconditional: 589, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 317, independent: 113, independent conditional: 0, independent unconditional: 113, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 200, unknown conditional: 0, unknown unconditional: 200] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 196, Positive conditional cache size: 0, Positive unconditional cache size: 196, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 55, Maximal queried relation: 0, ConditionTransformingIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 55, independent unconditional: 254, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 317, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 200, independent: 196, independent conditional: 0, independent unconditional: 196, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 200, independent: 190, independent conditional: 0, independent unconditional: 190, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 729, independent: 589, independent conditional: 0, independent unconditional: 589, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 317, independent: 113, independent conditional: 0, independent unconditional: 113, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 200, unknown conditional: 0, unknown unconditional: 200] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 196, Positive conditional cache size: 0, Positive unconditional cache size: 196, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 55 ], Independence queries for same thread: 23 - CounterExampleResult [Line: 763]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L716] 0 int memory[(2*320+1)]; [L717] 0 int next_alloc_idx = 1; [L718] 0 int m = 0; [L719] 0 int top; [L773] 0 int m2 = 0; [L774] 0 int state = 0; [L792] 0 pthread_t t; VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, top={4:0}] [L793] COND TRUE 0 1 [L793] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, t=-3, top={4:0}] [L777] CALL 1 __VERIFIER_atomic_acquire(&m2) [L693] EXPR 1 \read(*m) [L693] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L693] RET 1 assume_abort_if_not(*m==0) [L694] 1 *m = 1 [L777] RET 1 __VERIFIER_atomic_acquire(&m2) [L780] 1 case 0: [L781] CALL 1 EBStack_init() [L734] 1 top = 0 [L781] RET 1 EBStack_init() [L782] 1 state = 1 [L783] 1 case 1: VAL [\old(arg)={0:0}, arg={0:0}, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L784] CALL 1 __VERIFIER_atomic_release(&m2) [L698] EXPR 1 \read(*m) [L698] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L698] RET 1 assume_abort_if_not(*m==1) [L699] 1 *m = 0 [L784] RET 1 __VERIFIER_atomic_release(&m2) [L785] CALL 1 push_loop() [L766] 1 int r = -1; [L767] 1 int arg = __VERIFIER_nondet_int(); [L768] COND TRUE 1 1 [L769] CALL, EXPR 1 push(arg) [L743] 1 int oldTop = -1, newTop = -1, casret = -1; [L744] CALL, EXPR 1 index_malloc() [L721] 1 int curr_alloc_idx = -1; VAL [curr_alloc_idx=-1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L722] CALL 1 __VERIFIER_atomic_acquire(&m) [L693] EXPR 1 \read(*m) [L693] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L693] RET 1 assume_abort_if_not(*m==0) [L694] 1 *m = 1 [L722] RET 1 __VERIFIER_atomic_acquire(&m) [L723] COND FALSE 1 !(next_alloc_idx+2-1 > (2*320+1)) [L727] 1 curr_alloc_idx = next_alloc_idx [L728] 1 next_alloc_idx += 2 VAL [curr_alloc_idx=1, m2={5:0}, m={3:0}, next_alloc_idx=3, state=1, top={4:0}] [L729] CALL 1 __VERIFIER_atomic_release(&m) [L698] EXPR 1 \read(*m) [L698] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L698] RET 1 assume_abort_if_not(*m==1) [L699] 1 *m = 0 [L729] RET 1 __VERIFIER_atomic_release(&m) [L731] 1 return curr_alloc_idx; [L744] RET, EXPR 1 index_malloc() [L744] 1 newTop = index_malloc() [L745] COND FALSE 1 !(newTop == 0) [L748] 1 memory[newTop+0] = d VAL [\old(d)=0, casret={6:0}, d=0, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L793] COND TRUE 0 1 [L793] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [m2={5:0}, m={3:0}, next_alloc_idx=3, state=1, t=-2, top={4:0}] [L749] COND TRUE 1 1 VAL [\old(d)=0, casret={6:0}, d=0, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L751] EXPR 1 \read(top) [L751] 1 oldTop = top [L753] 1 memory[newTop+1] = oldTop VAL [\old(d)=0, casret={6:0}, d=0, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L754] CALL 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L707] EXPR 1 \read(*v) [L707] COND TRUE 1 *v == e [L709] 1 *v = u [L709] 1 *r = 1 [L754] RET 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L755] EXPR 1 \read(casret) VAL [\old(d)=0, casret={6:0}, d=0, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L755] COND TRUE 1 casret==1 [L756] 1 return 1; [L743] 1 int oldTop = -1, newTop = -1, casret = -1; [L756] 1 return 1; VAL [\old(d)=0, \result=1, d=0, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L769] RET, EXPR 1 push(arg) [L769] 1 r = push(arg) [L770] CALL 1 __VERIFIER_atomic_assert(r) [L763] EXPR 1 !r || !isEmpty() [L763] CALL, EXPR 1 isEmpty() [L737] EXPR 1 \read(top) [L737] COND FALSE 1 !(top == 0) [L740] 1 return 0; [L763] RET, EXPR 1 isEmpty() [L763] EXPR 1 !r || !isEmpty() [L763] COND TRUE 1 !(!(!r || !isEmpty())) [L763] 1 reach_error() VAL [\old(r)=1, m2={5:0}, m={3:0}, next_alloc_idx=3, r=1, state=1, top={4:0}] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thr1Thread1of1ForFork0 with 1 thread instances CFG has 3 procedures, 56 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.9s, 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: 3, 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, 0.2s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 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: ConditionalCommutativityOverallTime: 0.0s, ConditionalCommutativityCheckTime: 0.0s, ConditionalCommutativityIAIntegrations: 0, ConditionalCommutativityDFSRestarts: 0, ConditionalCommutativityCommutingCounterexamples: 0, ConditionalCommutativityConditionCalculations: 0, ConditionalCommutativityTraceChecks: 0, ConditionalCommutativityImperfectProofs: 0 RESULT: Ultimate proved your program to be incorrect! [2024-10-17 17:19:31,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2024-10-17 17:19:31,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE