./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis PERSISTENT_SETS --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 42d87675 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --traceabstraction.use.conditional.por.in.concurrent.analysis false --traceabstraction.commutativity.condition.synthesis NONE --traceabstraction.partial.order.reduction.in.concurrent.analysis PERSISTENT_SETS --- Real Ultimate output --- This is Ultimate 0.3.0-dev-42d8767-m [2025-04-25 02:17:30,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-25 02:17:30,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-04-25 02:17:30,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-25 02:17:30,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-25 02:17:30,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-25 02:17:30,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-25 02:17:30,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-25 02:17:30,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-25 02:17:30,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-25 02:17:30,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-25 02:17:30,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-25 02:17:30,837 INFO L153 SettingsManager]: * Use SBE=true [2025-04-25 02:17:30,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-25 02:17:30,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-25 02:17:30,839 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-25 02:17:30,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 02:17:30,840 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 02:17:30,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-25 02:17:30,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-25 02:17:30,841 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-04-25 02:17:30,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-25 02:17:30,841 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-04-25 02:17:30,841 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-04-25 02:17:30,841 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-04-25 02:17:30,841 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/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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Partial Order Reduction in concurrent analysis -> PERSISTENT_SETS [2025-04-25 02:17:31,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-25 02:17:31,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-25 02:17:31,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-25 02:17:31,110 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-25 02:17:31,111 INFO L274 PluginConnector]: CDTParser initialized [2025-04-25 02:17:31,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-04-25 02:17:32,477 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/efb025888/a8d70c86c3c241ffbc4443aba17a45cc/FLAGd8522c82f [2025-04-25 02:17:32,764 INFO L389 CDTParser]: Found 1 translation units. [2025-04-25 02:17:32,765 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2025-04-25 02:17:32,779 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/efb025888/a8d70c86c3c241ffbc4443aba17a45cc/FLAGd8522c82f [2025-04-25 02:17:33,528 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/efb025888/a8d70c86c3c241ffbc4443aba17a45cc [2025-04-25 02:17:33,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-25 02:17:33,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-25 02:17:33,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-25 02:17:33,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-25 02:17:33,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-25 02:17:33,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f7f953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33, skipping insertion in model container [2025-04-25 02:17:33,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-25 02:17:33,794 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2025-04-25 02:17:33,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-25 02:17:33,806 INFO L200 MainTranslator]: Completed pre-run [2025-04-25 02:17:33,857 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2025-04-25 02:17:33,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-25 02:17:33,883 INFO L204 MainTranslator]: Completed translation [2025-04-25 02:17:33,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33 WrapperNode [2025-04-25 02:17:33,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-25 02:17:33,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-25 02:17:33,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-25 02:17:33,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-25 02:17:33,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,912 INFO L138 Inliner]: procedures = 166, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2025-04-25 02:17:33,912 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-25 02:17:33,913 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-25 02:17:33,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-25 02:17:33,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-25 02:17:33,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,924 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-25 02:17:33,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-25 02:17:33,937 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-25 02:17:33,937 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-25 02:17:33,937 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (1/1) ... [2025-04-25 02:17:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-25 02:17:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-25 02:17:33,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-25 02:17:33,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-25 02:17:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-04-25 02:17:33,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-04-25 02:17:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-25 02:17:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-25 02:17:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-25 02:17:33,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-25 02:17:33,985 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-25 02:17:34,066 INFO L234 CfgBuilder]: Building ICFG [2025-04-25 02:17:34,068 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-25 02:17:34,161 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-25 02:17:34,161 INFO L283 CfgBuilder]: Performing block encoding [2025-04-25 02:17:34,217 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-25 02:17:34,217 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-25 02:17:34,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 02:17:34 BoogieIcfgContainer [2025-04-25 02:17:34,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-25 02:17:34,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-25 02:17:34,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-25 02:17:34,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-25 02:17:34,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.04 02:17:33" (1/3) ... [2025-04-25 02:17:34,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1002e785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.04 02:17:34, skipping insertion in model container [2025-04-25 02:17:34,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.04 02:17:33" (2/3) ... [2025-04-25 02:17:34,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1002e785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.04 02:17:34, skipping insertion in model container [2025-04-25 02:17:34,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 02:17:34" (3/3) ... [2025-04-25 02:17:34,224 INFO L128 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2025-04-25 02:17:34,237 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-25 02:17:34,239 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28_buggy_simple_loop1_vf.i that has 2 procedures, 15 locations, 19 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-25 02:17:34,240 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-25 02:17:34,293 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-25 02:17:34,326 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-25 02:17:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-25 02:17:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-25 02:17:34,330 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) [2025-04-25 02:17:34,332 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 [2025-04-25 02:17:34,392 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-25 02:17:34,402 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork0 ======== [2025-04-25 02:17:34,411 INFO L340 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;@75c81280, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-25 02:17:34,413 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-25 02:17:34,467 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-25 02:17:34,472 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-25 02:17:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -301422642, now seen corresponding path program 1 times [2025-04-25 02:17:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-25 02:17:34,478 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509769272] [2025-04-25 02:17:34,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-25 02:17:34,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-25 02:17:34,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-25 02:17:34,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-25 02:17:34,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 02:17:34,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-25 02:17:34,573 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-25 02:17:34,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-25 02:17:34,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-25 02:17:34,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-25 02:17:34,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-25 02:17:34,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-25 02:17:34,610 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-25 02:17:34,611 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-04-25 02:17:34,613 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-25 02:17:34,617 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-25 02:17:34,620 INFO L320 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork0 was UNSAFE (1/2) [2025-04-25 02:17:34,651 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-25 02:17:34,651 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-25 02:17:34,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Ended with exit code 0 [2025-04-25 02:17:34,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.04 02:17:34 BasicIcfg [2025-04-25 02:17:34,661 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-25 02:17:34,662 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-25 02:17:34,662 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-25 02:17:34,663 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-25 02:17:34,663 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.04 02:17:34" (3/4) ... [2025-04-25 02:17:34,664 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-04-25 02:17:34,710 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 3. [2025-04-25 02:17:34,738 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/witness.graphml [2025-04-25 02:17:34,738 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/witness.yml [2025-04-25 02:17:34,738 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-25 02:17:34,739 INFO L158 Benchmark]: Toolchain (without parser) took 1207.11ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 103.7MB in the end (delta: 7.6MB). Peak memory consumption was 82.5MB. Max. memory is 16.1GB. [2025-04-25 02:17:34,739 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 128.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 02:17:34,740 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.77ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 89.6MB in the end (delta: 21.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-25 02:17:34,740 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.81ms. Allocated memory is still 142.6MB. Free memory was 89.6MB in the beginning and 87.6MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 02:17:34,740 INFO L158 Benchmark]: Boogie Preprocessor took 22.63ms. Allocated memory is still 142.6MB. Free memory was 87.6MB in the beginning and 86.6MB in the end (delta: 987.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-25 02:17:34,740 INFO L158 Benchmark]: RCFGBuilder took 281.24ms. Allocated memory is still 142.6MB. Free memory was 86.6MB in the beginning and 69.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-25 02:17:34,740 INFO L158 Benchmark]: TraceAbstraction took 441.61ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 41.3MB in the end (delta: 27.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-25 02:17:34,741 INFO L158 Benchmark]: Witness Printer took 76.73ms. Allocated memory is still 142.6MB. Free memory was 41.3MB in the beginning and 103.7MB in the end (delta: -62.4MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2025-04-25 02:17:34,742 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 128.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 350.77ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 89.6MB in the end (delta: 21.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.81ms. Allocated memory is still 142.6MB. Free memory was 89.6MB in the beginning and 87.6MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.63ms. Allocated memory is still 142.6MB. Free memory was 87.6MB in the beginning and 86.6MB in the end (delta: 987.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 281.24ms. Allocated memory is still 142.6MB. Free memory was 86.6MB in the beginning and 69.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 441.61ms. Allocated memory is still 142.6MB. Free memory was 68.9MB in the beginning and 41.3MB in the end (delta: 27.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 76.73ms. Allocated memory is still 142.6MB. Free memory was 41.3MB in the beginning and 103.7MB in the end (delta: -62.4MB). Peak memory consumption was 15.4MB. 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: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 78, independent: 75, independent conditional: 0, independent unconditional: 75, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 3, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 3, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 12, independent conditional: 0, independent unconditional: 12, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 78, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 78, unknown conditional: 0, unknown unconditional: 78] , Statistics on independence cache: Total cache size (in pairs): 78, Positive cache size: 76, Positive conditional cache size: 0, Positive unconditional cache size: 76, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Independence queries for same thread: 0, Persistent sets #1 benchmarks: Persistent set computation time: 0.0s, Number of persistent set computation: 8, Number of trivial persistent sets: 6, Underlying independence relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 78, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 78, independent: 75, independent conditional: 0, independent unconditional: 75, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 3, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 3, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 12, independent conditional: 0, independent unconditional: 12, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 78, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 78, unknown conditional: 0, unknown unconditional: 78] , Statistics on independence cache: Total cache size (in pairs): 78, Positive cache size: 76, Positive conditional cache size: 0, Positive unconditional cache size: 76, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Independence queries for same thread: 0 - CounterExampleResult [Line: 695]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L700] 0 pthread_t t; [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [\at(arg, Pre)={0:0}, t=-1] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [\at(arg, Pre)={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i