./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --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-C-DAC/pthread-demo-datarace-1.i -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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:16:17,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:16:17,615 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-30 10:16:17,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:16:17,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:16:17,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:16:17,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:16:17,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:16:17,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:16:17,639 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:16:17,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:16:17,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:16:17,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:16:17,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:16:17,640 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:16:17,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:16:17,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-30 10:16:17,641 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-30 10:16:17,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:16:17,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:16:17,642 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:16:17,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:16:17,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:16:17,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:16:17,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:16:17,644 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:16:17,644 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 -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2025-04-30 10:16:17,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:16:17,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:16:17,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:16:17,916 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:16:17,916 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:16:17,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2025-04-30 10:16:19,297 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e9a653b/644053c99b314b6898d9001edf81d765/FLAG7f14046d9 [2025-04-30 10:16:19,601 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:16:19,602 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2025-04-30 10:16:19,618 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e9a653b/644053c99b314b6898d9001edf81d765/FLAG7f14046d9 [2025-04-30 10:16:20,348 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e9a653b/644053c99b314b6898d9001edf81d765 [2025-04-30 10:16:20,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:16:20,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:16:20,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:16:20,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:16:20,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:16:20,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:16:20" (1/1) ... [2025-04-30 10:16:20,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d83804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:20, skipping insertion in model container [2025-04-30 10:16:20,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:16:20" (1/1) ... [2025-04-30 10:16:20,399 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:16:20,588 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-04-30 10:16:20,861 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:16:20,870 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:16:20,892 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2025-04-30 10:16:20,927 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:16:21,003 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:16:21,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21 WrapperNode [2025-04-30 10:16:21,004 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:16:21,005 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:16:21,005 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:16:21,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:16:21,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,048 INFO L138 Inliner]: procedures = 364, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2025-04-30 10:16:21,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:16:21,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:16:21,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:16:21,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:16:21,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,065 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2025-04-30 10:16:21,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,072 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,080 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:16:21,087 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:16:21,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:16:21,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:16:21,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (1/1) ... [2025-04-30 10:16:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:16:21,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:21,115 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) [2025-04-30 10:16:21,122 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 [2025-04-30 10:16:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-30 10:16:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-30 10:16:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-30 10:16:21,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2025-04-30 10:16:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2025-04-30 10:16:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-30 10:16:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-30 10:16:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:16:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:16:21,148 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-30 10:16:21,257 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:16:21,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:16:21,394 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-30 10:16:21,394 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:16:21,479 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:16:21,479 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-30 10:16:21,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:16:21 BoogieIcfgContainer [2025-04-30 10:16:21,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:16:21,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:16:21,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:16:21,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:16:21,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:16:20" (1/3) ... [2025-04-30 10:16:21,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7deeeae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:16:21, skipping insertion in model container [2025-04-30 10:16:21,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:16:21" (2/3) ... [2025-04-30 10:16:21,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7deeeae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:16:21, skipping insertion in model container [2025-04-30 10:16:21,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:16:21" (3/3) ... [2025-04-30 10:16:21,490 INFO L128 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2025-04-30 10:16:21,502 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:16:21,504 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pthread-demo-datarace-1.i that has 2 procedures, 22 locations, 23 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-30 10:16:21,504 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-30 10:16:21,550 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-04-30 10:16:21,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2025-04-30 10:16:21,597 INFO L116 PetriNetUnfolderBase]: 3/23 cut-off events. [2025-04-30 10:16:21,602 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-30 10:16:21,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-04-30 10:16:21,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2025-04-30 10:16:21,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2025-04-30 10:16:21,616 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:16:21,625 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;@3a839173, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:16:21,625 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-30 10:16:21,631 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-30 10:16:21,631 INFO L116 PetriNetUnfolderBase]: 2/19 cut-off events. [2025-04-30 10:16:21,631 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-30 10:16:21,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:21,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:21,632 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:21,636 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash 498321794, now seen corresponding path program 1 times [2025-04-30 10:16:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:21,642 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539331955] [2025-04-30 10:16:21,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:16:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:21,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-30 10:16:21,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-30 10:16:21,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:16:21,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:21,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:21,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539331955] [2025-04-30 10:16:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539331955] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:16:21,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:16:21,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:16:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255069261] [2025-04-30 10:16:21,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:16:21,815 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:16:21,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:21,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:16:21,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:16:21,845 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-30 10:16:21,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2025-04-30 10:16:21,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:21,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-30 10:16:21,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:21,930 INFO L116 PetriNetUnfolderBase]: 61/133 cut-off events. [2025-04-30 10:16:21,931 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-30 10:16:21,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 133 events. 61/133 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 393 event pairs, 27 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 247. Up to 77 conditions per place. [2025-04-30 10:16:21,934 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2025-04-30 10:16:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2025-04-30 10:16:21,938 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:16:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:16:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-04-30 10:16:21,951 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-04-30 10:16:21,953 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2025-04-30 10:16:21,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2025-04-30 10:16:21,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-30 10:16:21,961 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2025-04-30 10:16:21,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2025-04-30 10:16:21,967 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2025-04-30 10:16:21,967 INFO L485 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2025-04-30 10:16:21,968 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2025-04-30 10:16:21,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:21,968 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:21,968 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-30 10:16:21,969 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:21,970 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1911755262, now seen corresponding path program 1 times [2025-04-30 10:16:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:21,970 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375104035] [2025-04-30 10:16:21,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:16:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:21,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-30 10:16:22,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-30 10:16:22,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:16:22,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-30 10:16:22,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:22,082 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375104035] [2025-04-30 10:16:22,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375104035] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:16:22,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:16:22,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:16:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332953391] [2025-04-30 10:16:22,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:16:22,083 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:16:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:22,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:16:22,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:16:22,086 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-04-30 10:16:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-30 10:16:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-04-30 10:16:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:22,174 INFO L116 PetriNetUnfolderBase]: 91/207 cut-off events. [2025-04-30 10:16:22,174 INFO L117 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-04-30 10:16:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 207 events. 91/207 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 733 event pairs, 46 based on Foata normal form. 9/216 useless extension candidates. Maximal degree in co-relation 144. Up to 113 conditions per place. [2025-04-30 10:16:22,176 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2025-04-30 10:16:22,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 134 flow [2025-04-30 10:16:22,177 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:16:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:16:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-04-30 10:16:22,180 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-04-30 10:16:22,180 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 46 transitions. [2025-04-30 10:16:22,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 134 flow [2025-04-30 10:16:22,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:16:22,181 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2025-04-30 10:16:22,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2025-04-30 10:16:22,182 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2025-04-30 10:16:22,182 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2025-04-30 10:16:22,182 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-30 10:16:22,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:22,183 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] [2025-04-30 10:16:22,183 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-30 10:16:22,183 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:22,184 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1567007287, now seen corresponding path program 1 times [2025-04-30 10:16:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:22,184 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382911542] [2025-04-30 10:16:22,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:16:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:22,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-30 10:16:22,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-30 10:16:22,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:16:22,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:22,332 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382911542] [2025-04-30 10:16:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382911542] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:16:22,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:16:22,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:16:22,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283641753] [2025-04-30 10:16:22,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:16:22,333 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:16:22,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:22,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:16:22,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:16:22,334 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2025-04-30 10:16:22,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-04-30 10:16:22,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:22,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2025-04-30 10:16:22,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:22,405 INFO L116 PetriNetUnfolderBase]: 59/155 cut-off events. [2025-04-30 10:16:22,406 INFO L117 PetriNetUnfolderBase]: For 67/68 co-relation queries the response was YES. [2025-04-30 10:16:22,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 155 events. 59/155 cut-off events. For 67/68 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 479 event pairs, 20 based on Foata normal form. 16/170 useless extension candidates. Maximal degree in co-relation 109. Up to 72 conditions per place. [2025-04-30 10:16:22,407 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 20 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2025-04-30 10:16:22,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 142 flow [2025-04-30 10:16:22,407 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:16:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-30 10:16:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2025-04-30 10:16:22,408 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-04-30 10:16:22,408 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 43 transitions. [2025-04-30 10:16:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 142 flow [2025-04-30 10:16:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:16:22,410 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2025-04-30 10:16:22,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-04-30 10:16:22,411 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2025-04-30 10:16:22,411 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2025-04-30 10:16:22,411 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-04-30 10:16:22,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:22,411 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] [2025-04-30 10:16:22,411 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-30 10:16:22,411 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:22,412 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash 644591165, now seen corresponding path program 2 times [2025-04-30 10:16:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:22,412 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236849326] [2025-04-30 10:16:22,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:16:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:22,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 1 equivalence classes. [2025-04-30 10:16:22,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-30 10:16:22,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-30 10:16:22,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:22,493 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236849326] [2025-04-30 10:16:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236849326] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:16:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:16:22,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:16:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8590459] [2025-04-30 10:16:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:16:22,494 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:16:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:22,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:16:22,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:16:22,501 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-30 10:16:22,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-04-30 10:16:22,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:22,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-30 10:16:22,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:22,573 INFO L116 PetriNetUnfolderBase]: 93/241 cut-off events. [2025-04-30 10:16:22,573 INFO L117 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2025-04-30 10:16:22,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 241 events. 93/241 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 872 event pairs, 25 based on Foata normal form. 10/250 useless extension candidates. Maximal degree in co-relation 133. Up to 101 conditions per place. [2025-04-30 10:16:22,575 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 36 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2025-04-30 10:16:22,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 224 flow [2025-04-30 10:16:22,576 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:16:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-30 10:16:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-04-30 10:16:22,576 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-04-30 10:16:22,576 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 4 states and 61 transitions. [2025-04-30 10:16:22,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 224 flow [2025-04-30 10:16:22,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-30 10:16:22,577 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 82 flow [2025-04-30 10:16:22,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2025-04-30 10:16:22,578 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2025-04-30 10:16:22,578 INFO L485 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 82 flow [2025-04-30 10:16:22,578 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-04-30 10:16:22,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:22,578 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:22,578 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-30 10:16:22,578 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:22,579 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 606764315, now seen corresponding path program 3 times [2025-04-30 10:16:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:22,579 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601193455] [2025-04-30 10:16:22,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:16:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:22,592 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-04-30 10:16:22,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 25 statements. [2025-04-30 10:16:22,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-30 10:16:22,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-30 10:16:22,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:22,655 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601193455] [2025-04-30 10:16:22,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601193455] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:22,655 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910802661] [2025-04-30 10:16:22,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:16:22,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:22,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:22,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:22,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:16:22,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-04-30 10:16:22,740 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 25 statements. [2025-04-30 10:16:22,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-30 10:16:22,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:22,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-30 10:16:22,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-30 10:16:22,786 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-04-30 10:16:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910802661] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:22,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:22,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-30 10:16:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287628398] [2025-04-30 10:16:22,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:22,809 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-30 10:16:22,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:22,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-30 10:16:22,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-30 10:16:22,814 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-30 10:16:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2025-04-30 10:16:22,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:22,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-30 10:16:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:22,943 INFO L116 PetriNetUnfolderBase]: 204/467 cut-off events. [2025-04-30 10:16:22,943 INFO L117 PetriNetUnfolderBase]: For 411/411 co-relation queries the response was YES. [2025-04-30 10:16:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 467 events. 204/467 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1754 event pairs, 18 based on Foata normal form. 39/506 useless extension candidates. Maximal degree in co-relation 427. Up to 107 conditions per place. [2025-04-30 10:16:22,947 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2025-04-30 10:16:22,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 66 transitions, 382 flow [2025-04-30 10:16:22,947 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:16:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-30 10:16:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2025-04-30 10:16:22,948 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2025-04-30 10:16:22,948 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 82 flow. Second operand 6 states and 91 transitions. [2025-04-30 10:16:22,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 66 transitions, 382 flow [2025-04-30 10:16:22,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 352 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-04-30 10:16:22,951 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 116 flow [2025-04-30 10:16:22,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2025-04-30 10:16:22,952 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2025-04-30 10:16:22,953 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 116 flow [2025-04-30 10:16:22,953 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2025-04-30 10:16:22,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:22,953 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:22,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:16:23,156 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:23,156 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:23,157 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1741330360, now seen corresponding path program 4 times [2025-04-30 10:16:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:23,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751058666] [2025-04-30 10:16:23,158 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:16:23,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:23,173 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-04-30 10:16:23,193 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-04-30 10:16:23,193 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:16:23,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-04-30 10:16:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:23,297 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751058666] [2025-04-30 10:16:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751058666] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:23,297 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188606787] [2025-04-30 10:16:23,297 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:16:23,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:23,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:16:23,351 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-04-30 10:16:23,375 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-04-30 10:16:23,375 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:16:23,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:23,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-30 10:16:23,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-30 10:16:23,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-30 10:16:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188606787] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:23,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:23,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-04-30 10:16:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298959684] [2025-04-30 10:16:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:23,543 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-30 10:16:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:23,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-30 10:16:23,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2025-04-30 10:16:23,555 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:16:23,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 116 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 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) [2025-04-30 10:16:23,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:23,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:16:23,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:24,285 INFO L116 PetriNetUnfolderBase]: 635/1470 cut-off events. [2025-04-30 10:16:24,286 INFO L117 PetriNetUnfolderBase]: For 2126/2126 co-relation queries the response was YES. [2025-04-30 10:16:24,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 1470 events. 635/1470 cut-off events. For 2126/2126 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 6561 event pairs, 8 based on Foata normal form. 161/1631 useless extension candidates. Maximal degree in co-relation 1299. Up to 265 conditions per place. [2025-04-30 10:16:24,297 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 322 selfloop transitions, 92 changer transitions 0/417 dead transitions. [2025-04-30 10:16:24,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 417 transitions, 2484 flow [2025-04-30 10:16:24,298 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-30 10:16:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-30 10:16:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 674 transitions. [2025-04-30 10:16:24,301 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6240740740740741 [2025-04-30 10:16:24,301 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 116 flow. Second operand 45 states and 674 transitions. [2025-04-30 10:16:24,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 417 transitions, 2484 flow [2025-04-30 10:16:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 417 transitions, 2404 flow, removed 36 selfloop flow, removed 1 redundant places. [2025-04-30 10:16:24,317 INFO L231 Difference]: Finished difference. Result has 111 places, 110 transitions, 992 flow [2025-04-30 10:16:24,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=992, PETRI_PLACES=111, PETRI_TRANSITIONS=110} [2025-04-30 10:16:24,319 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 89 predicate places. [2025-04-30 10:16:24,319 INFO L485 AbstractCegarLoop]: Abstraction has has 111 places, 110 transitions, 992 flow [2025-04-30 10:16:24,320 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 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) [2025-04-30 10:16:24,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:24,320 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:24,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-30 10:16:24,522 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-30 10:16:24,522 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:24,523 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1905638090, now seen corresponding path program 5 times [2025-04-30 10:16:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:24,523 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384697884] [2025-04-30 10:16:24,523 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-30 10:16:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:24,542 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 75 statements into 11 equivalence classes. [2025-04-30 10:16:24,570 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-04-30 10:16:24,573 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-04-30 10:16:24,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-04-30 10:16:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:24,667 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384697884] [2025-04-30 10:16:24,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384697884] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:24,667 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376867793] [2025-04-30 10:16:24,667 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-30 10:16:24,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:24,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:24,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:24,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:16:24,733 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 75 statements into 11 equivalence classes. [2025-04-30 10:16:24,778 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 75 of 75 statements. [2025-04-30 10:16:24,779 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-04-30 10:16:24,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:24,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-30 10:16:24,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-04-30 10:16:24,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-04-30 10:16:25,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376867793] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:25,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:25,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 26 [2025-04-30 10:16:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144909458] [2025-04-30 10:16:25,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:25,221 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-30 10:16:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:25,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-30 10:16:25,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2025-04-30 10:16:25,246 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:16:25,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 110 transitions, 992 flow. Second operand has 26 states, 26 states have (on average 10.23076923076923) internal successors, (266), 26 states have internal predecessors, (266), 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) [2025-04-30 10:16:25,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:25,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:16:25,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:27,724 INFO L116 PetriNetUnfolderBase]: 1467/3366 cut-off events. [2025-04-30 10:16:27,724 INFO L117 PetriNetUnfolderBase]: For 123752/123752 co-relation queries the response was YES. [2025-04-30 10:16:27,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16939 conditions, 3366 events. 1467/3366 cut-off events. For 123752/123752 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 16309 event pairs, 8 based on Foata normal form. 323/3689 useless extension candidates. Maximal degree in co-relation 14759. Up to 618 conditions per place. [2025-04-30 10:16:27,757 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 766 selfloop transitions, 255 changer transitions 0/1024 dead transitions. [2025-04-30 10:16:27,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1024 transitions, 8912 flow [2025-04-30 10:16:27,758 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2025-04-30 10:16:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2025-04-30 10:16:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 1582 transitions. [2025-04-30 10:16:27,763 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6218553459119497 [2025-04-30 10:16:27,763 INFO L175 Difference]: Start difference. First operand has 111 places, 110 transitions, 992 flow. Second operand 106 states and 1582 transitions. [2025-04-30 10:16:27,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1024 transitions, 8912 flow [2025-04-30 10:16:27,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1024 transitions, 8634 flow, removed 62 selfloop flow, removed 5 redundant places. [2025-04-30 10:16:27,839 INFO L231 Difference]: Finished difference. Result has 276 places, 277 transitions, 3728 flow [2025-04-30 10:16:27,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=3728, PETRI_PLACES=276, PETRI_TRANSITIONS=277} [2025-04-30 10:16:27,840 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 254 predicate places. [2025-04-30 10:16:27,840 INFO L485 AbstractCegarLoop]: Abstraction has has 276 places, 277 transitions, 3728 flow [2025-04-30 10:16:27,842 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.23076923076923) internal successors, (266), 26 states have internal predecessors, (266), 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) [2025-04-30 10:16:27,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:27,842 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:27,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-30 10:16:28,042 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:28,043 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:28,044 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash -889039722, now seen corresponding path program 6 times [2025-04-30 10:16:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:28,044 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230245209] [2025-04-30 10:16:28,044 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-30 10:16:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:28,076 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 130 statements into 21 equivalence classes. [2025-04-30 10:16:28,097 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 70 of 130 statements. [2025-04-30 10:16:28,099 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-04-30 10:16:28,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:28,288 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230245209] [2025-04-30 10:16:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230245209] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:28,288 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378932748] [2025-04-30 10:16:28,288 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-30 10:16:28,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:28,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:28,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-30 10:16:28,362 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 130 statements into 21 equivalence classes. [2025-04-30 10:16:28,407 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 70 of 130 statements. [2025-04-30 10:16:28,407 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-04-30 10:16:28,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:28,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-30 10:16:28,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:28,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378932748] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:28,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-30 10:16:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775645678] [2025-04-30 10:16:28,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:28,744 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-30 10:16:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:28,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-30 10:16:28,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-30 10:16:28,750 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:16:28,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 277 transitions, 3728 flow. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 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) [2025-04-30 10:16:28,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:28,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:16:28,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:30,291 INFO L116 PetriNetUnfolderBase]: 2930/6907 cut-off events. [2025-04-30 10:16:30,292 INFO L117 PetriNetUnfolderBase]: For 651930/652004 co-relation queries the response was YES. [2025-04-30 10:16:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52694 conditions, 6907 events. 2930/6907 cut-off events. For 651930/652004 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 41677 event pairs, 362 based on Foata normal form. 608/7352 useless extension candidates. Maximal degree in co-relation 45985. Up to 1113 conditions per place. [2025-04-30 10:16:30,375 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 320 selfloop transitions, 152 changer transitions 0/485 dead transitions. [2025-04-30 10:16:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 485 transitions, 8334 flow [2025-04-30 10:16:30,377 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-30 10:16:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-30 10:16:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2025-04-30 10:16:30,377 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.65625 [2025-04-30 10:16:30,377 INFO L175 Difference]: Start difference. First operand has 276 places, 277 transitions, 3728 flow. Second operand 12 states and 189 transitions. [2025-04-30 10:16:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 485 transitions, 8334 flow [2025-04-30 10:16:31,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 485 transitions, 7542 flow, removed 261 selfloop flow, removed 36 redundant places. [2025-04-30 10:16:31,132 INFO L231 Difference]: Finished difference. Result has 258 places, 283 transitions, 3780 flow [2025-04-30 10:16:31,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3780, PETRI_PLACES=258, PETRI_TRANSITIONS=283} [2025-04-30 10:16:31,133 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 236 predicate places. [2025-04-30 10:16:31,133 INFO L485 AbstractCegarLoop]: Abstraction has has 258 places, 283 transitions, 3780 flow [2025-04-30 10:16:31,134 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 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) [2025-04-30 10:16:31,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:31,134 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:31,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-30 10:16:31,334 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:31,335 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:31,336 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1173181996, now seen corresponding path program 7 times [2025-04-30 10:16:31,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:31,337 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443984968] [2025-04-30 10:16:31,337 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-30 10:16:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:31,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-04-30 10:16:31,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-04-30 10:16:31,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:16:31,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:31,757 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443984968] [2025-04-30 10:16:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443984968] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:31,757 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995925882] [2025-04-30 10:16:31,757 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-30 10:16:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:31,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:31,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-30 10:16:31,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 160 statements into 1 equivalence classes. [2025-04-30 10:16:31,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 160 of 160 statements. [2025-04-30 10:16:31,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:16:31,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:31,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-30 10:16:31,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:31,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:16:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995925882] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:32,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2025-04-30 10:16:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032787893] [2025-04-30 10:16:32,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:32,177 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-30 10:16:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:32,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-30 10:16:32,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-04-30 10:16:32,184 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:16:32,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 283 transitions, 3780 flow. Second operand has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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) [2025-04-30 10:16:32,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:32,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:16:32,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:35,405 INFO L116 PetriNetUnfolderBase]: 5620/13107 cut-off events. [2025-04-30 10:16:35,405 INFO L117 PetriNetUnfolderBase]: For 1510131/1510165 co-relation queries the response was YES. [2025-04-30 10:16:35,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114752 conditions, 13107 events. 5620/13107 cut-off events. For 1510131/1510165 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 86613 event pairs, 522 based on Foata normal form. 1024/13808 useless extension candidates. Maximal degree in co-relation 100582. Up to 2163 conditions per place. [2025-04-30 10:16:35,620 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 162 changer transitions 0/785 dead transitions. [2025-04-30 10:16:35,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 785 transitions, 13504 flow [2025-04-30 10:16:35,620 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-30 10:16:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-30 10:16:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 353 transitions. [2025-04-30 10:16:35,622 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6685606060606061 [2025-04-30 10:16:35,622 INFO L175 Difference]: Start difference. First operand has 258 places, 283 transitions, 3780 flow. Second operand 22 states and 353 transitions. [2025-04-30 10:16:35,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 785 transitions, 13504 flow [2025-04-30 10:16:36,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 785 transitions, 12754 flow, removed 256 selfloop flow, removed 4 redundant places. [2025-04-30 10:16:36,660 INFO L231 Difference]: Finished difference. Result has 286 places, 294 transitions, 4176 flow [2025-04-30 10:16:36,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4176, PETRI_PLACES=286, PETRI_TRANSITIONS=294} [2025-04-30 10:16:36,661 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 264 predicate places. [2025-04-30 10:16:36,661 INFO L485 AbstractCegarLoop]: Abstraction has has 286 places, 294 transitions, 4176 flow [2025-04-30 10:16:36,661 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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) [2025-04-30 10:16:36,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:16:36,661 INFO L206 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:16:36,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-30 10:16:36,861 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:36,862 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:16:36,863 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:16:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 90658172, now seen corresponding path program 8 times [2025-04-30 10:16:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:16:36,863 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037865389] [2025-04-30 10:16:36,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:16:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:16:36,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 210 statements into 2 equivalence classes. [2025-04-30 10:16:36,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-04-30 10:16:36,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:16:36,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:39,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:16:39,106 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037865389] [2025-04-30 10:16:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037865389] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:16:39,107 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298541721] [2025-04-30 10:16:39,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:16:39,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:16:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:16:39,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:16:39,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-30 10:16:39,212 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 210 statements into 2 equivalence classes. [2025-04-30 10:16:39,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 210 of 210 statements. [2025-04-30 10:16:39,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:16:39,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:16:39,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-04-30 10:16:39,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:16:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:39,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:16:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:16:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298541721] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:16:39,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:16:39,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2025-04-30 10:16:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085844917] [2025-04-30 10:16:39,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:16:39,724 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-04-30 10:16:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:16:39,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-04-30 10:16:39,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2025-04-30 10:16:39,733 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:16:39,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 294 transitions, 4176 flow. Second operand has 45 states, 45 states have (on average 8.777777777777779) internal successors, (395), 45 states have internal predecessors, (395), 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) [2025-04-30 10:16:39,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:16:39,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:16:39,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:16:49,577 INFO L116 PetriNetUnfolderBase]: 8836/22631 cut-off events. [2025-04-30 10:16:49,577 INFO L117 PetriNetUnfolderBase]: For 3982338/3982398 co-relation queries the response was YES. [2025-04-30 10:16:49,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242870 conditions, 22631 events. 8836/22631 cut-off events. For 3982338/3982398 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 177962 event pairs, 1318 based on Foata normal form. 1/22461 useless extension candidates. Maximal degree in co-relation 229320. Up to 4842 conditions per place. [2025-04-30 10:16:50,008 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 1960 selfloop transitions, 83 changer transitions 2/2061 dead transitions. [2025-04-30 10:16:50,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2061 transitions, 45295 flow [2025-04-30 10:16:50,009 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-30 10:16:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-30 10:16:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 666 transitions. [2025-04-30 10:16:50,011 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2025-04-30 10:16:50,011 INFO L175 Difference]: Start difference. First operand has 286 places, 294 transitions, 4176 flow. Second operand 44 states and 666 transitions. [2025-04-30 10:16:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2061 transitions, 45295 flow [2025-04-30 10:17:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 2061 transitions, 44192 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-04-30 10:17:02,497 INFO L231 Difference]: Finished difference. Result has 322 places, 376 transitions, 4250 flow [2025-04-30 10:17:02,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4250, PETRI_PLACES=322, PETRI_TRANSITIONS=376} [2025-04-30 10:17:02,499 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 300 predicate places. [2025-04-30 10:17:02,499 INFO L485 AbstractCegarLoop]: Abstraction has has 322 places, 376 transitions, 4250 flow [2025-04-30 10:17:02,499 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 8.777777777777779) internal successors, (395), 45 states have internal predecessors, (395), 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) [2025-04-30 10:17:02,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:17:02,499 INFO L206 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:17:02,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-30 10:17:02,699 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:17:02,700 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:17:02,701 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:17:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 938745761, now seen corresponding path program 9 times [2025-04-30 10:17:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:17:02,701 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461514451] [2025-04-30 10:17:02,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:17:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:17:02,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 215 statements into 24 equivalence classes. [2025-04-30 10:17:02,790 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 200 of 215 statements. [2025-04-30 10:17:02,790 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-04-30 10:17:02,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:17:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 1373 proven. 57 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:17:03,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:17:03,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461514451] [2025-04-30 10:17:03,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461514451] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:17:03,286 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10327519] [2025-04-30 10:17:03,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-30 10:17:03,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:17:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:17:03,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:17:03,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-30 10:17:03,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 215 statements into 24 equivalence classes. [2025-04-30 10:17:03,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 200 of 215 statements. [2025-04-30 10:17:03,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-04-30 10:17:03,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:17:03,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-30 10:17:03,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:17:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 1430 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:17:03,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-30 10:17:03,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10327519] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:17:03,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-30 10:17:03,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2025-04-30 10:17:03,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047860258] [2025-04-30 10:17:03,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:17:03,947 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-30 10:17:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:17:03,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-30 10:17:03,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2025-04-30 10:17:03,956 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2025-04-30 10:17:03,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 376 transitions, 4250 flow. Second operand has 23 states, 23 states have (on average 11.043478260869565) internal successors, (254), 23 states have internal predecessors, (254), 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) [2025-04-30 10:17:03,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:17:03,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2025-04-30 10:17:03,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:17:08,165 INFO L116 PetriNetUnfolderBase]: 8085/18908 cut-off events. [2025-04-30 10:17:08,166 INFO L117 PetriNetUnfolderBase]: For 1198146/1198338 co-relation queries the response was YES. [2025-04-30 10:17:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148423 conditions, 18908 events. 8085/18908 cut-off events. For 1198146/1198338 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 139973 event pairs, 244 based on Foata normal form. 219/18956 useless extension candidates. Maximal degree in co-relation 148292. Up to 4026 conditions per place. [2025-04-30 10:17:08,379 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 2005 selfloop transitions, 105 changer transitions 0/2116 dead transitions. [2025-04-30 10:17:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 2116 transitions, 29476 flow [2025-04-30 10:17:08,380 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-30 10:17:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-30 10:17:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 355 transitions. [2025-04-30 10:17:08,380 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6431159420289855 [2025-04-30 10:17:08,380 INFO L175 Difference]: Start difference. First operand has 322 places, 376 transitions, 4250 flow. Second operand 23 states and 355 transitions. [2025-04-30 10:17:08,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 2116 transitions, 29476 flow [2025-04-30 10:17:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 2116 transitions, 29474 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-30 10:17:10,877 INFO L231 Difference]: Finished difference. Result has 342 places, 371 transitions, 4388 flow [2025-04-30 10:17:10,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4388, PETRI_PLACES=342, PETRI_TRANSITIONS=371} [2025-04-30 10:17:10,878 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 320 predicate places. [2025-04-30 10:17:10,878 INFO L485 AbstractCegarLoop]: Abstraction has has 342 places, 371 transitions, 4388 flow [2025-04-30 10:17:10,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.043478260869565) internal successors, (254), 23 states have internal predecessors, (254), 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) [2025-04-30 10:17:10,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-30 10:17:10,879 INFO L206 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:17:10,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-30 10:17:11,080 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:17:11,082 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-30 10:17:11,084 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:17:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 815142964, now seen corresponding path program 10 times [2025-04-30 10:17:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:17:11,084 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283580834] [2025-04-30 10:17:11,084 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-30 10:17:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:17:11,125 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 215 statements into 2 equivalence classes. [2025-04-30 10:17:11,166 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 215 of 215 statements. [2025-04-30 10:17:11,167 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-30 10:17:11,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:17:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2025-04-30 10:17:11,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:17:11,722 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283580834] [2025-04-30 10:17:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283580834] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:17:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:17:11,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2025-04-30 10:17:11,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575840331] [2025-04-30 10:17:11,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:17:11,723 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-30 10:17:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:17:11,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-30 10:17:11,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2025-04-30 10:17:11,743 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-04-30 10:17:11,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 371 transitions, 4388 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 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) [2025-04-30 10:17:11,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-30 10:17:11,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-04-30 10:17:11,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-30 10:17:14,675 INFO L116 PetriNetUnfolderBase]: 5482/12943 cut-off events. [2025-04-30 10:17:14,676 INFO L117 PetriNetUnfolderBase]: For 752411/752411 co-relation queries the response was YES. [2025-04-30 10:17:14,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96809 conditions, 12943 events. 5482/12943 cut-off events. For 752411/752411 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 87699 event pairs, 439 based on Foata normal form. 83/12687 useless extension candidates. Maximal degree in co-relation 95983. Up to 2163 conditions per place. [2025-04-30 10:17:14,795 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 0 selfloop transitions, 0 changer transitions 1639/1639 dead transitions. [2025-04-30 10:17:14,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1639 transitions, 19313 flow [2025-04-30 10:17:14,796 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-30 10:17:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-30 10:17:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 353 transitions. [2025-04-30 10:17:14,796 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6394927536231884 [2025-04-30 10:17:14,797 INFO L175 Difference]: Start difference. First operand has 342 places, 371 transitions, 4388 flow. Second operand 23 states and 353 transitions. [2025-04-30 10:17:14,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1639 transitions, 19313 flow [2025-04-30 10:17:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1639 transitions, 18375 flow, removed 0 selfloop flow, removed 24 redundant places. [2025-04-30 10:17:16,034 INFO L231 Difference]: Finished difference. Result has 337 places, 0 transitions, 0 flow [2025-04-30 10:17:16,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=337, PETRI_TRANSITIONS=0} [2025-04-30 10:17:16,035 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 315 predicate places. [2025-04-30 10:17:16,035 INFO L485 AbstractCegarLoop]: Abstraction has has 337 places, 0 transitions, 0 flow [2025-04-30 10:17:16,035 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 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) [2025-04-30 10:17:16,037 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-04-30 10:17:16,037 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2025-04-30 10:17:16,037 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-04-30 10:17:16,037 INFO L422 BasicCegarLoop]: Path program histogram: [10, 1, 1] [2025-04-30 10:17:16,039 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-30 10:17:16,039 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-30 10:17:16,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.04 10:17:16 BasicIcfg [2025-04-30 10:17:16,042 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-30 10:17:16,043 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-30 10:17:16,043 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-30 10:17:16,043 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-30 10:17:16,043 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:16:21" (3/4) ... [2025-04-30 10:17:16,045 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-04-30 10:17:16,046 INFO L362 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_function_mutex [2025-04-30 10:17:16,048 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 44 nodes and edges [2025-04-30 10:17:16,049 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-04-30 10:17:16,049 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2025-04-30 10:17:16,049 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-04-30 10:17:16,094 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-04-30 10:17:16,094 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-04-30 10:17:16,094 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-30 10:17:16,095 INFO L158 Benchmark]: Toolchain (without parser) took 55743.72ms. Allocated memory was 142.6MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 108.9MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2025-04-30 10:17:16,095 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 129.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:17:16,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 650.99ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 68.0MB in the end (delta: 40.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-04-30 10:17:16,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.54ms. Allocated memory is still 142.6MB. Free memory was 68.0MB in the beginning and 65.6MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:17:16,095 INFO L158 Benchmark]: Boogie Preprocessor took 36.20ms. Allocated memory is still 142.6MB. Free memory was 65.6MB in the beginning and 64.0MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:17:16,096 INFO L158 Benchmark]: RCFGBuilder took 392.99ms. Allocated memory is still 142.6MB. Free memory was 64.0MB in the beginning and 42.3MB in the end (delta: 21.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-30 10:17:16,096 INFO L158 Benchmark]: TraceAbstraction took 54560.88ms. Allocated memory was 142.6MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 41.7MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2025-04-30 10:17:16,096 INFO L158 Benchmark]: Witness Printer took 51.61ms. Allocated memory is still 2.9GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:17:16,097 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 201.3MB. Free memory is still 129.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 650.99ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 68.0MB in the end (delta: 40.8MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.54ms. Allocated memory is still 142.6MB. Free memory was 68.0MB in the beginning and 65.6MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.20ms. Allocated memory is still 142.6MB. Free memory was 65.6MB in the beginning and 64.0MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 392.99ms. Allocated memory is still 142.6MB. Free memory was 64.0MB in the beginning and 42.3MB in the end (delta: 21.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 54560.88ms. Allocated memory was 142.6MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 41.7MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. * Witness Printer took 51.61ms. Allocated memory is still 2.9GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 3 procedures, 30 locations, 33 edges, 2 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: 54.5s, OverallIterations: 12, TraceHistogramMax: 21, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 44.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3144 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3129 mSDsluCounter, 375 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 368 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20993 IncrementalHoareTripleChecker+Invalid, 21047 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 7 mSDtfsCounter, 20993 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1840 GetRequests, 1559 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3947 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4388occurred in iteration=11, InterpolantAutomatonStates: 294, 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: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1990 NumberOfCodeBlocks, 1830 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2605 ConstructedInterpolants, 0 QuantifiedInterpolants, 6460 SizeOfPredicates, 22 NumberOfNonLiveVariables, 3393 ConjunctsInSsa, 186 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 12936/20193 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! [2025-04-30 10:17:16,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE