./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1 --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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:18:26,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:18:26,335 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 07:18:26,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:18:26,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:18:26,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:18:26,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:18:26,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:18:26,360 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:18:26,360 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:18:26,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:18:26,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:18:26,361 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:18:26,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:18:26,361 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:18:26,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:18:26,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 07:18:26,361 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:18:26,362 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:18:26,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:26,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:26,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:18:26,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:18:26,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:18:26,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:18:26,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:18:26,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:18:26,364 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1 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 -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2024-12-02 07:18:26,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:18:26,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:18:26,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:18:26,617 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:18:26,618 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:18:26,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2024-12-02 07:18:29,271 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/data/aacdaf831/d3ac7cdfe4da4f2597f3bffec017a35b/FLAGc589f0554 [2024-12-02 07:18:29,480 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:18:29,481 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/sv-benchmarks/c/pthread/queue_ok_longest.i [2024-12-02 07:18:29,494 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/data/aacdaf831/d3ac7cdfe4da4f2597f3bffec017a35b/FLAGc589f0554 [2024-12-02 07:18:29,506 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/data/aacdaf831/d3ac7cdfe4da4f2597f3bffec017a35b [2024-12-02 07:18:29,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:18:29,508 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:18:29,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:18:29,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:18:29,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:18:29,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:29" (1/1) ... [2024-12-02 07:18:29,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a8320cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:29, skipping insertion in model container [2024-12-02 07:18:29,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:18:29" (1/1) ... [2024-12-02 07:18:29,544 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:18:29,902 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2024-12-02 07:18:29,907 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2024-12-02 07:18:29,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:18:29,954 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:18:30,001 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2024-12-02 07:18:30,003 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2024-12-02 07:18:30,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:18:30,120 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:18:30,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30 WrapperNode [2024-12-02 07:18:30,120 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:18:30,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:18:30,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:18:30,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:18:30,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,156 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,244 INFO L138 Inliner]: procedures = 274, calls = 1652, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 1795 [2024-12-02 07:18:30,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:18:30,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:18:30,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:18:30,245 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:18:30,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,299 INFO L175 MemorySlicer]: Split 1635 memory accesses to 4 slices as follows [2, 5, 802, 826]. 51 percent of accesses are in the largest equivalence class. The 1610 initializations are split as follows [2, 5, 800, 803]. The 11 writes are split as follows [0, 0, 1, 10]. [2024-12-02 07:18:30,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,345 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:18:30,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:18:30,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:18:30,380 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:18:30,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (1/1) ... [2024-12-02 07:18:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:18:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:18:30,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:18:30,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:18:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-12-02 07:18:30,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-12-02 07:18:30,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:18:30,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:18:30,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:18:30,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 07:18:30,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 07:18:30,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:18:30,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:18:30,443 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 07:18:30,570 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:18:30,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:18:32,409 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:18:32,410 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:18:58,540 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:18:58,540 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 07:18:58,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:58 BoogieIcfgContainer [2024-12-02 07:18:58,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:18:58,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:18:58,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:18:58,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:18:58,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:18:29" (1/3) ... [2024-12-02 07:18:58,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298cc122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:58, skipping insertion in model container [2024-12-02 07:18:58,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:18:30" (2/3) ... [2024-12-02 07:18:58,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298cc122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:18:58, skipping insertion in model container [2024-12-02 07:18:58,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:18:58" (3/3) ... [2024-12-02 07:18:58,548 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2024-12-02 07:18:58,560 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:18:58,562 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longest.i that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-12-02 07:18:58,562 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:18:58,652 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 07:18:58,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2024-12-02 07:18:58,776 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2024-12-02 07:18:58,778 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 07:18:58,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-12-02 07:18:58,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2024-12-02 07:18:58,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2024-12-02 07:18:58,792 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:18:58,803 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@9b81021, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:18:58,803 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-12-02 07:18:58,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:18:58,860 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 07:18:58,860 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 07:18:58,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:58,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 07:18:58,861 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:18:58,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 3709584, now seen corresponding path program 1 times [2024-12-02 07:18:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:58,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916440170] [2024-12-02 07:18:58,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:58,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:18:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:18:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:18:59,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:18:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916440170] [2024-12-02 07:18:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916440170] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:18:59,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:18:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:18:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183894998] [2024-12-02 07:18:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:18:59,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 07:18:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:18:59,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 07:18:59,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 07:18:59,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:18:59,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:59,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:18:59,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:18:59,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:18:59,866 INFO L124 PetriNetUnfolderBase]: 290/498 cut-off events. [2024-12-02 07:18:59,866 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-12-02 07:18:59,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 498 events. 290/498 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1954 event pairs, 199 based on Foata normal form. 15/436 useless extension candidates. Maximal degree in co-relation 914. Up to 461 conditions per place. [2024-12-02 07:18:59,871 INFO L140 encePairwiseOnDemand]: 38/40 looper letters, 25 selfloop transitions, 0 changer transitions 2/32 dead transitions. [2024-12-02 07:18:59,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 127 flow [2024-12-02 07:18:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 07:18:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-12-02 07:18:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-12-02 07:18:59,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-12-02 07:18:59,887 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 2 states and 45 transitions. [2024-12-02 07:18:59,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 127 flow [2024-12-02 07:18:59,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 07:18:59,895 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 64 flow [2024-12-02 07:18:59,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-12-02 07:18:59,900 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-12-02 07:18:59,901 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 64 flow [2024-12-02 07:18:59,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:18:59,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:18:59,901 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:18:59,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:18:59,902 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:18:59,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:18:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1112751824, now seen corresponding path program 1 times [2024-12-02 07:18:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:18:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220500882] [2024-12-02 07:18:59,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:18:59,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220500882] [2024-12-02 07:19:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220500882] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:19:00,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:19:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:19:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451858934] [2024-12-02 07:19:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:19:00,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:19:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:00,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:19:00,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:19:00,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:00,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 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) [2024-12-02 07:19:00,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:00,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:00,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:01,136 INFO L124 PetriNetUnfolderBase]: 147/299 cut-off events. [2024-12-02 07:19:01,136 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 07:19:01,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 299 events. 147/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1060 event pairs, 76 based on Foata normal form. 13/279 useless extension candidates. Maximal degree in co-relation 586. Up to 146 conditions per place. [2024-12-02 07:19:01,139 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 27 selfloop transitions, 2 changer transitions 4/38 dead transitions. [2024-12-02 07:19:01,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 149 flow [2024-12-02 07:19:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:19:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:19:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-12-02 07:19:01,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-12-02 07:19:01,140 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 64 flow. Second operand 3 states and 58 transitions. [2024-12-02 07:19:01,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 149 flow [2024-12-02 07:19:01,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 07:19:01,142 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 70 flow [2024-12-02 07:19:01,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-12-02 07:19:01,143 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-12-02 07:19:01,143 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 70 flow [2024-12-02 07:19:01,143 INFO L472 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) [2024-12-02 07:19:01,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:01,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:01,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:19:01,144 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:01,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1565647488, now seen corresponding path program 1 times [2024-12-02 07:19:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108096127] [2024-12-02 07:19:01,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:01,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108096127] [2024-12-02 07:19:01,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108096127] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:19:01,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:19:01,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:19:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160397504] [2024-12-02 07:19:01,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:19:01,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:19:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:01,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:19:01,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:19:01,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:01,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-12-02 07:19:01,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:01,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:01,982 INFO L124 PetriNetUnfolderBase]: 149/304 cut-off events. [2024-12-02 07:19:01,982 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-12-02 07:19:01,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 304 events. 149/304 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1057 event pairs, 118 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 622. Up to 257 conditions per place. [2024-12-02 07:19:01,984 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-12-02 07:19:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 144 flow [2024-12-02 07:19:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:19:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:19:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-12-02 07:19:01,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-12-02 07:19:01,986 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-12-02 07:19:01,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 144 flow [2024-12-02 07:19:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:19:01,987 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 78 flow [2024-12-02 07:19:01,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-12-02 07:19:01,987 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-12-02 07:19:01,987 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 78 flow [2024-12-02 07:19:01,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-12-02 07:19:01,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:01,988 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] [2024-12-02 07:19:01,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:19:01,988 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:01,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2031534680, now seen corresponding path program 1 times [2024-12-02 07:19:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834251785] [2024-12-02 07:19:01,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:02,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834251785] [2024-12-02 07:19:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834251785] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737157199] [2024-12-02 07:19:02,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:02,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:02,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:02,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:02,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:19:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:02,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 3397 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 07:19:02,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:02,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737157199] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:19:02,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:19:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-12-02 07:19:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887058475] [2024-12-02 07:19:02,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:19:02,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:19:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:02,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:19:02,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:19:02,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:02,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:02,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:02,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:02,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:03,355 INFO L124 PetriNetUnfolderBase]: 176/355 cut-off events. [2024-12-02 07:19:03,355 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-12-02 07:19:03,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 355 events. 176/355 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1213 event pairs, 118 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 785. Up to 257 conditions per place. [2024-12-02 07:19:03,356 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 43 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-12-02 07:19:03,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 234 flow [2024-12-02 07:19:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:19:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 07:19:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-12-02 07:19:03,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-12-02 07:19:03,358 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 6 states and 99 transitions. [2024-12-02 07:19:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 234 flow [2024-12-02 07:19:03,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 07:19:03,360 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 110 flow [2024-12-02 07:19:03,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-12-02 07:19:03,360 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-12-02 07:19:03,360 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 110 flow [2024-12-02 07:19:03,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:03,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:03,361 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:03,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:19:03,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:03,561 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:03,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1416046038, now seen corresponding path program 2 times [2024-12-02 07:19:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592364917] [2024-12-02 07:19:03,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:19:03,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:03,657 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:19:03,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 07:19:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592364917] [2024-12-02 07:19:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592364917] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:19:04,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:19:04,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:19:04,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349036911] [2024-12-02 07:19:04,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:19:04,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:19:04,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:04,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:19:04,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:19:04,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:04,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:04,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:04,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:04,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:04,536 INFO L124 PetriNetUnfolderBase]: 130/299 cut-off events. [2024-12-02 07:19:04,536 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-12-02 07:19:04,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 299 events. 130/299 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1030 event pairs, 33 based on Foata normal form. 16/305 useless extension candidates. Maximal degree in co-relation 699. Up to 178 conditions per place. [2024-12-02 07:19:04,538 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 31 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2024-12-02 07:19:04,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 197 flow [2024-12-02 07:19:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:19:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:19:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-12-02 07:19:04,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-12-02 07:19:04,539 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 110 flow. Second operand 3 states and 57 transitions. [2024-12-02 07:19:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 197 flow [2024-12-02 07:19:04,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 183 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 07:19:04,541 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2024-12-02 07:19:04,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-12-02 07:19:04,542 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-12-02 07:19:04,542 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2024-12-02 07:19:04,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:04,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:04,542 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:04,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:19:04,543 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:04,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 149472962, now seen corresponding path program 1 times [2024-12-02 07:19:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:04,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512151745] [2024-12-02 07:19:04,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:04,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:04,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512151745] [2024-12-02 07:19:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512151745] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117855225] [2024-12-02 07:19:04,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:19:04,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:04,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:04,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:19:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:19:05,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 3475 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 07:19:05,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:05,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117855225] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:19:05,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:19:05,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-12-02 07:19:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507033943] [2024-12-02 07:19:05,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:19:05,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:19:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:05,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:19:05,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:19:05,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:05,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:05,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:05,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:05,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:06,954 INFO L124 PetriNetUnfolderBase]: 166/351 cut-off events. [2024-12-02 07:19:06,954 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-12-02 07:19:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 351 events. 166/351 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1097 event pairs, 90 based on Foata normal form. 36/373 useless extension candidates. Maximal degree in co-relation 897. Up to 207 conditions per place. [2024-12-02 07:19:06,956 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 63 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-12-02 07:19:06,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 386 flow [2024-12-02 07:19:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:19:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 07:19:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2024-12-02 07:19:06,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-12-02 07:19:06,958 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 12 states and 176 transitions. [2024-12-02 07:19:06,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 386 flow [2024-12-02 07:19:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:19:06,960 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 183 flow [2024-12-02 07:19:06,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=183, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2024-12-02 07:19:06,961 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-12-02 07:19:06,961 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 183 flow [2024-12-02 07:19:06,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:06,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:06,962 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:06,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:19:07,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 07:19:07,162 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:07,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1950607874, now seen corresponding path program 2 times [2024-12-02 07:19:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:07,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622078438] [2024-12-02 07:19:07,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:19:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:07,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:19:07,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622078438] [2024-12-02 07:19:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622078438] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770203716] [2024-12-02 07:19:07,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:19:07,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:07,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:07,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:19:08,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:19:08,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:08,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 3619 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 07:19:08,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:19:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:08,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:19:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770203716] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:19:08,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:19:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-12-02 07:19:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303044587] [2024-12-02 07:19:08,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:19:08,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 07:19:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:19:08,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 07:19:08,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-02 07:19:08,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:19:08,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 183 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:08,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:19:08,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:19:08,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:19:10,070 INFO L124 PetriNetUnfolderBase]: 238/495 cut-off events. [2024-12-02 07:19:10,070 INFO L125 PetriNetUnfolderBase]: For 2934/2934 co-relation queries the response was YES. [2024-12-02 07:19:10,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 495 events. 238/495 cut-off events. For 2934/2934 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1492 event pairs, 90 based on Foata normal form. 72/553 useless extension candidates. Maximal degree in co-relation 1549. Up to 207 conditions per place. [2024-12-02 07:19:10,073 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 111 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2024-12-02 07:19:10,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 767 flow [2024-12-02 07:19:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:19:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 07:19:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 338 transitions. [2024-12-02 07:19:10,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2024-12-02 07:19:10,076 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 183 flow. Second operand 24 states and 338 transitions. [2024-12-02 07:19:10,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 767 flow [2024-12-02 07:19:10,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 695 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-12-02 07:19:10,084 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 303 flow [2024-12-02 07:19:10,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=303, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2024-12-02 07:19:10,085 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2024-12-02 07:19:10,085 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 303 flow [2024-12-02 07:19:10,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:19:10,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:19:10,085 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:19:10,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:19:10,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:10,286 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:19:10,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:19:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1776670590, now seen corresponding path program 3 times [2024-12-02 07:19:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:19:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917309945] [2024-12-02 07:19:10,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:19:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:19:18,858 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 07:19:18,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:19:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:19:20,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:19:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917309945] [2024-12-02 07:19:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917309945] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:19:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647374871] [2024-12-02 07:19:20,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:19:20,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:19:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:19:20,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:19:20,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:30:05,348 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 07:30:05,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:05,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 3907 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 07:30:05,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:30:05,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:30:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647374871] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:06,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-12-02 07:30:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803891843] [2024-12-02 07:30:06,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:06,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-12-02 07:30:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:06,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-12-02 07:30:06,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=1226, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 07:30:06,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:30:06,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 303 flow. Second operand has 50 states, 50 states have (on average 9.38) internal successors, (469), 50 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:06,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:06,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:30:06,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:07,655 INFO L124 PetriNetUnfolderBase]: 382/787 cut-off events. [2024-12-02 07:30:07,655 INFO L125 PetriNetUnfolderBase]: For 31652/31652 co-relation queries the response was YES. [2024-12-02 07:30:07,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 787 events. 382/787 cut-off events. For 31652/31652 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2297 event pairs, 59 based on Foata normal form. 144/917 useless extension candidates. Maximal degree in co-relation 2681. Up to 235 conditions per place. [2024-12-02 07:30:07,661 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 210 selfloop transitions, 48 changer transitions 4/267 dead transitions. [2024-12-02 07:30:07,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 267 transitions, 1500 flow [2024-12-02 07:30:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 07:30:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-12-02 07:30:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 678 transitions. [2024-12-02 07:30:07,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34591836734693876 [2024-12-02 07:30:07,665 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 303 flow. Second operand 49 states and 678 transitions. [2024-12-02 07:30:07,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 267 transitions, 1500 flow [2024-12-02 07:30:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 267 transitions, 1356 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-12-02 07:30:07,678 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 449 flow [2024-12-02 07:30:07,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=449, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2024-12-02 07:30:07,679 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2024-12-02 07:30:07,679 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 449 flow [2024-12-02 07:30:07,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 9.38) internal successors, (469), 50 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:07,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:07,679 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:07,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 07:30:07,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:07,880 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:30:07,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -290888318, now seen corresponding path program 4 times [2024-12-02 07:30:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837011375] [2024-12-02 07:30:07,881 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:30:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:08,091 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:30:08,091 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:30:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837011375] [2024-12-02 07:30:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837011375] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:30:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773435810] [2024-12-02 07:30:11,881 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:30:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:30:11,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:30:11,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:30:12,785 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:30:12,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:12,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 07:30:12,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:30:12,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:30:15,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773435810] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:15,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:15,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-12-02 07:30:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273639213] [2024-12-02 07:30:15,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:15,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 07:30:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:15,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 07:30:15,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 07:30:15,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-12-02 07:30:15,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 449 flow. Second operand has 97 states, 97 states have (on average 9.185567010309278) internal successors, (891), 97 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:15,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:30:15,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-12-02 07:30:15,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:30:19,023 INFO L124 PetriNetUnfolderBase]: 670/1359 cut-off events. [2024-12-02 07:30:19,024 INFO L125 PetriNetUnfolderBase]: For 62090/62090 co-relation queries the response was YES. [2024-12-02 07:30:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1359 events. 670/1359 cut-off events. For 62090/62090 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3869 event pairs, 90 based on Foata normal form. 288/1633 useless extension candidates. Maximal degree in co-relation 4651. Up to 451 conditions per place. [2024-12-02 07:30:19,030 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 399 selfloop transitions, 95 changer transitions 0/499 dead transitions. [2024-12-02 07:30:19,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 499 transitions, 2761 flow [2024-12-02 07:30:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 07:30:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-12-02 07:30:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1310 transitions. [2024-12-02 07:30:19,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3411458333333333 [2024-12-02 07:30:19,035 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 449 flow. Second operand 96 states and 1310 transitions. [2024-12-02 07:30:19,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 499 transitions, 2761 flow [2024-12-02 07:30:19,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 499 transitions, 2287 flow, removed 192 selfloop flow, removed 45 redundant places. [2024-12-02 07:30:19,055 INFO L231 Difference]: Finished difference. Result has 223 places, 123 transitions, 743 flow [2024-12-02 07:30:19,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=743, PETRI_PLACES=223, PETRI_TRANSITIONS=123} [2024-12-02 07:30:19,056 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 187 predicate places. [2024-12-02 07:30:19,056 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 123 transitions, 743 flow [2024-12-02 07:30:19,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 9.185567010309278) internal successors, (891), 97 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:19,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:30:19,057 INFO L206 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:19,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:30:19,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:19,258 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-12-02 07:30:19,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -187506814, now seen corresponding path program 5 times [2024-12-02 07:30:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683251595] [2024-12-02 07:30:19,259 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:30:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:07,661 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2024-12-02 07:31:07,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:15,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683251595] [2024-12-02 07:31:15,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683251595] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286922308] [2024-12-02 07:31:15,316 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:31:15,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:15,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:15,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f083fbdd-5eff-425b-835a-4ffa9f1b7c55/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process