./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stateful01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/stateful01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 560b304531bcea247b62326ce191dbe904418675f87e9f50f83c923909701738 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 10:58:41,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 10:58:41,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-29 10:58:41,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 10:58:41,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 10:58:41,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 10:58:41,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 10:58:41,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 10:58:41,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 10:58:41,187 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 10:58:41,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 10:58:41,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 10:58:41,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 10:58:41,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 10:58:41,188 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 10:58:41,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-29 10:58:41,189 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 10:58:41,190 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:41,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:41,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:41,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 10:58:41,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 10:58:41,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 10:58:41,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 10:58:41,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 10:58:41,192 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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/UAutomizer-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 -> Automizer 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 -> 560b304531bcea247b62326ce191dbe904418675f87e9f50f83c923909701738 [2025-04-29 10:58:41,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 10:58:41,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 10:58:41,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 10:58:41,417 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 10:58:41,417 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 10:58:41,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stateful01-2.c [2025-04-29 10:58:42,726 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f7ed2bf/9e48298531ec4a0e8f1ffab20a47d782/FLAG0de91143a [2025-04-29 10:58:42,945 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 10:58:42,946 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.c [2025-04-29 10:58:42,947 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:42,947 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:42,952 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f7ed2bf/9e48298531ec4a0e8f1ffab20a47d782/FLAG0de91143a [2025-04-29 10:58:43,725 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f7ed2bf/9e48298531ec4a0e8f1ffab20a47d782 [2025-04-29 10:58:43,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 10:58:43,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 10:58:43,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:43,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 10:58:43,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 10:58:43,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f5f951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43, skipping insertion in model container [2025-04-29 10:58:43,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,741 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 10:58:43,864 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.c[1092,1105] [2025-04-29 10:58:43,867 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:43,871 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 10:58:43,885 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.c[1092,1105] [2025-04-29 10:58:43,886 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:43,894 INFO L204 MainTranslator]: Completed translation [2025-04-29 10:58:43,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43 WrapperNode [2025-04-29 10:58:43,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:43,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:43,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 10:58:43,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 10:58:43,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,916 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2025-04-29 10:58:43,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:43,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 10:58:43,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 10:58:43,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 10:58:43,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,924 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,934 INFO L175 MemorySlicer]: Split 2 memory accesses to 2 slices as follows [1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [1, 1]. The 0 writes are split as follows [0, 0]. [2025-04-29 10:58:43,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,938 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 10:58:43,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 10:58:43,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 10:58:43,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 10:58:43,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (1/1) ... [2025-04-29 10:58:43,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:43,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:43,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-29 10:58:43,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-29 10:58:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-29 10:58:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-29 10:58:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 10:58:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 10:58:43,984 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 10:58:44,047 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 10:58:44,049 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 10:58:44,172 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 10:58:44,173 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 10:58:44,240 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 10:58:44,241 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-29 10:58:44,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:44 BoogieIcfgContainer [2025-04-29 10:58:44,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 10:58:44,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 10:58:44,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 10:58:44,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 10:58:44,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 10:58:43" (1/3) ... [2025-04-29 10:58:44,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8dab06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:44, skipping insertion in model container [2025-04-29 10:58:44,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:43" (2/3) ... [2025-04-29 10:58:44,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8dab06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:44, skipping insertion in model container [2025-04-29 10:58:44,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:44" (3/3) ... [2025-04-29 10:58:44,248 INFO L128 eAbstractionObserver]: Analyzing ICFG stateful01-2.c [2025-04-29 10:58:44,256 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 10:58:44,257 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stateful01-2.c that has 3 procedures, 32 locations, 30 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-29 10:58:44,258 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 10:58:44,299 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-29 10:58:44,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 32 transitions, 78 flow [2025-04-29 10:58:44,359 INFO L116 PetriNetUnfolderBase]: 1/30 cut-off events. [2025-04-29 10:58:44,360 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 10:58:44,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 1/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2025-04-29 10:58:44,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 32 transitions, 78 flow [2025-04-29 10:58:44,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 27 transitions, 66 flow [2025-04-29 10:58:44,370 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 10:58:44,378 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=PETRI_NET, 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;@7ddc55bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 10:58:44,378 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-29 10:58:44,386 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 10:58:44,387 INFO L116 PetriNetUnfolderBase]: 0/26 cut-off events. [2025-04-29 10:58:44,387 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 10:58:44,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:44,387 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:44,389 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-29 10:58:44,393 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1051096167, now seen corresponding path program 1 times [2025-04-29 10:58:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:44,400 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846271619] [2025-04-29 10:58:44,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:44,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-29 10:58:44,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 10:58:44,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:44,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:44,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:44,709 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846271619] [2025-04-29 10:58:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846271619] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:44,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 10:58:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819331788] [2025-04-29 10:58:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:44,715 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 10:58:44,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:44,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 10:58:44,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-29 10:58:44,769 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2025-04-29 10:58:44,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:44,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:44,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2025-04-29 10:58:44,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:44,957 INFO L116 PetriNetUnfolderBase]: 271/538 cut-off events. [2025-04-29 10:58:44,957 INFO L117 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-04-29 10:58:44,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 538 events. 271/538 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2346 event pairs, 72 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 995. Up to 230 conditions per place. [2025-04-29 10:58:44,963 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 22 selfloop transitions, 2 changer transitions 25/54 dead transitions. [2025-04-29 10:58:44,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 230 flow [2025-04-29 10:58:44,964 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2025-04-29 10:58:44,973 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-04-29 10:58:44,973 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 66 flow. Second operand 5 states and 90 transitions. [2025-04-29 10:58:44,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 230 flow [2025-04-29 10:58:44,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 10:58:44,980 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 68 flow [2025-04-29 10:58:44,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2025-04-29 10:58:44,984 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2025-04-29 10:58:44,985 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 68 flow [2025-04-29 10:58:44,986 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:44,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:44,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:44,986 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 10:58:44,986 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-29 10:58:44,986 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -151463791, now seen corresponding path program 2 times [2025-04-29 10:58:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:44,986 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585937837] [2025-04-29 10:58:44,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 10:58:44,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:45,000 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 1 equivalence classes. [2025-04-29 10:58:45,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 10:58:45,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 10:58:45,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:45,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:45,085 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585937837] [2025-04-29 10:58:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585937837] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:45,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:45,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:45,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16017237] [2025-04-29 10:58:45,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:45,086 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 10:58:45,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:45,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 10:58:45,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 10:58:45,088 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2025-04-29 10:58:45,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:45,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:45,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2025-04-29 10:58:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:45,173 INFO L116 PetriNetUnfolderBase]: 65/155 cut-off events. [2025-04-29 10:58:45,173 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 10:58:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 155 events. 65/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 421 event pairs, 26 based on Foata normal form. 22/173 useless extension candidates. Maximal degree in co-relation 315. Up to 89 conditions per place. [2025-04-29 10:58:45,174 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 17 selfloop transitions, 8 changer transitions 2/33 dead transitions. [2025-04-29 10:58:45,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 136 flow [2025-04-29 10:58:45,175 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 10:58:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 10:58:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-04-29 10:58:45,175 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-04-29 10:58:45,175 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 68 flow. Second operand 3 states and 58 transitions. [2025-04-29 10:58:45,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 136 flow [2025-04-29 10:58:45,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 130 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-04-29 10:58:45,176 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 78 flow [2025-04-29 10:58:45,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-04-29 10:58:45,176 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-04-29 10:58:45,177 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 78 flow [2025-04-29 10:58:45,177 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:45,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:45,177 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:45,177 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-29 10:58:45,177 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-29 10:58:45,177 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -106982681, now seen corresponding path program 3 times [2025-04-29 10:58:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:45,177 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148135676] [2025-04-29 10:58:45,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 10:58:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:45,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 1 equivalence classes. [2025-04-29 10:58:45,200 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 10:58:45,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-29 10:58:45,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:45,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:45,275 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148135676] [2025-04-29 10:58:45,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148135676] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:45,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:45,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 10:58:45,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55285076] [2025-04-29 10:58:45,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:45,276 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 10:58:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:45,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 10:58:45,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-29 10:58:45,299 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2025-04-29 10:58:45,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:45,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:45,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2025-04-29 10:58:45,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:45,357 INFO L116 PetriNetUnfolderBase]: 65/159 cut-off events. [2025-04-29 10:58:45,358 INFO L117 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-04-29 10:58:45,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 159 events. 65/159 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 446 event pairs, 12 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 127. Up to 104 conditions per place. [2025-04-29 10:58:45,358 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2025-04-29 10:58:45,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 150 flow [2025-04-29 10:58:45,359 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2025-04-29 10:58:45,359 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43125 [2025-04-29 10:58:45,359 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 78 flow. Second operand 5 states and 69 transitions. [2025-04-29 10:58:45,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 150 flow [2025-04-29 10:58:45,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 10:58:45,363 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2025-04-29 10:58:45,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2025-04-29 10:58:45,363 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2025-04-29 10:58:45,364 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2025-04-29 10:58:45,364 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 10:58:45,366 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-29 10:58:45,366 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-29 10:58:45,366 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-29 10:58:45,366 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-29 10:58:45,366 INFO L422 BasicCegarLoop]: Path program histogram: [3] [2025-04-29 10:58:45,369 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-29 10:58:45,369 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-29 10:58:45,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 10:58:45 BasicIcfg [2025-04-29 10:58:45,375 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-29 10:58:45,376 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-29 10:58:45,376 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-29 10:58:45,376 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-29 10:58:45,377 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:44" (3/4) ... [2025-04-29 10:58:45,378 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-04-29 10:58:45,380 INFO L362 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-04-29 10:58:45,381 INFO L362 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-04-29 10:58:45,382 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2025-04-29 10:58:45,383 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2025-04-29 10:58:45,383 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-04-29 10:58:45,428 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-04-29 10:58:45,428 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-04-29 10:58:45,428 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-29 10:58:45,429 INFO L158 Benchmark]: Toolchain (without parser) took 1700.39ms. Allocated memory is still 142.6MB. Free memory was 105.7MB in the beginning and 94.8MB in the end (delta: 10.9MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2025-04-29 10:58:45,429 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:45,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.22ms. Allocated memory is still 142.6MB. Free memory was 105.7MB in the beginning and 92.0MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-29 10:58:45,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.11ms. Allocated memory is still 142.6MB. Free memory was 92.0MB in the beginning and 90.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:45,429 INFO L158 Benchmark]: Boogie Preprocessor took 25.02ms. Allocated memory is still 142.6MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:45,430 INFO L158 Benchmark]: RCFGBuilder took 298.40ms. Allocated memory is still 142.6MB. Free memory was 88.9MB in the beginning and 69.1MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-29 10:58:45,430 INFO L158 Benchmark]: TraceAbstraction took 1133.12ms. Allocated memory is still 142.6MB. Free memory was 69.1MB in the beginning and 99.6MB in the end (delta: -30.5MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2025-04-29 10:58:45,430 INFO L158 Benchmark]: Witness Printer took 52.06ms. Allocated memory is still 142.6MB. Free memory was 99.6MB in the beginning and 94.8MB in the end (delta: 4.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 10:58:45,431 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.22ms. Allocated memory is still 142.6MB. Free memory was 105.7MB in the beginning and 92.0MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.11ms. Allocated memory is still 142.6MB. Free memory was 92.0MB in the beginning and 90.0MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.02ms. Allocated memory is still 142.6MB. Free memory was 90.0MB in the beginning and 88.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 298.40ms. Allocated memory is still 142.6MB. Free memory was 88.9MB in the beginning and 69.1MB in the end (delta: 19.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1133.12ms. Allocated memory is still 142.6MB. Free memory was 69.1MB in the beginning and 99.6MB in the end (delta: -30.5MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. * Witness Printer took 52.06ms. Allocated memory is still 142.6MB. Free memory was 99.6MB in the beginning and 94.8MB in the end (delta: 4.8MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 64]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 54 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 280 IncrementalHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 280 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-29 10:58:45,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE