./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --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_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/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_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/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_25d36795-4c06-428f-8315-f2e0faa87f2b/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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:14:42,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:14:42,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 13:14:42,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:14:42,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:14:42,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:14:42,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:14:42,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:14:42,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:14:42,482 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:14:42,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:14:42,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:14:42,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:14:42,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:14:42,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:14:42,484 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:14:42,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:42,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:42,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:14:42,485 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:14:42,486 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:14:42,486 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:14:42,486 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_25d36795-4c06-428f-8315-f2e0faa87f2b/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 -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-12-02 13:14:42,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:14:42,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:14:42,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:14:42,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:14:42,718 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:14:42,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-12-02 13:14:45,390 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/data/66da55092/aede5bc9a78d45c8aa127ba45a619fc8/FLAG652157401 [2024-12-02 13:14:45,571 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:14:45,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-12-02 13:14:45,578 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/data/66da55092/aede5bc9a78d45c8aa127ba45a619fc8/FLAG652157401 [2024-12-02 13:14:45,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/data/66da55092/aede5bc9a78d45c8aa127ba45a619fc8 [2024-12-02 13:14:45,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:14:45,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:14:45,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:14:45,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:14:45,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:14:45,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34724dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45, skipping insertion in model container [2024-12-02 13:14:45,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:14:45,757 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_25d36795-4c06-428f-8315-f2e0faa87f2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-12-02 13:14:45,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:14:45,775 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:14:45,801 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_25d36795-4c06-428f-8315-f2e0faa87f2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-12-02 13:14:45,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:14:45,817 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:14:45,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45 WrapperNode [2024-12-02 13:14:45,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:14:45,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:14:45,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:14:45,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:14:45,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,857 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 300 [2024-12-02 13:14:45,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:14:45,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:14:45,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:14:45,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:14:45,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,871 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,887 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-12-02 13:14:45,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,896 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:14:45,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:14:45,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:14:45,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:14:45,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (1/1) ... [2024-12-02 13:14:45,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:14:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:45,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:14:45,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:14:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:14:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:14:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:14:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:14:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:14:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 13:14:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:14:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 13:14:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 13:14:45,969 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 13:14:46,063 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:14:46,065 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:14:46,475 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:14:46,476 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:14:46,801 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:14:46,802 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 13:14:46,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:14:46 BoogieIcfgContainer [2024-12-02 13:14:46,802 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:14:46,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:14:46,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:14:46,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:14:46,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:14:45" (1/3) ... [2024-12-02 13:14:46,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67325339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:14:46, skipping insertion in model container [2024-12-02 13:14:46,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:14:45" (2/3) ... [2024-12-02 13:14:46,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67325339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:14:46, skipping insertion in model container [2024-12-02 13:14:46,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:14:46" (3/3) ... [2024-12-02 13:14:46,809 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-12-02 13:14:46,821 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:14:46,822 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-trans.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-12-02 13:14:46,822 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:14:46,883 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 13:14:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2024-12-02 13:14:46,939 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-12-02 13:14:46,941 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:14:46,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-12-02 13:14:46,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2024-12-02 13:14:46,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2024-12-02 13:14:46,953 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:14:46,963 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;@2717cbf2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:14:46,963 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 13:14:46,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:14:46,975 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-12-02 13:14:46,975 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:14:46,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:46,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:46,976 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 1 more)] === [2024-12-02 13:14:46,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2112718655, now seen corresponding path program 1 times [2024-12-02 13:14:46,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:46,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960768394] [2024-12-02 13:14:46,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:47,153 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 13:14:47,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:47,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960768394] [2024-12-02 13:14:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960768394] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:47,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:47,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:14:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923082965] [2024-12-02 13:14:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:47,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 13:14:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:47,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 13:14:47,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 13:14:47,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:47,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 13:14:47,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:47,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:47,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:47,478 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2024-12-02 13:14:47,478 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-12-02 13:14:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3709 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2024-12-02 13:14:47,489 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-12-02 13:14:47,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2024-12-02 13:14:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 13:14:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-12-02 13:14:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-12-02 13:14:47,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-12-02 13:14:47,501 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2024-12-02 13:14:47,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2024-12-02 13:14:47,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 13:14:47,508 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2024-12-02 13:14:47,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-12-02 13:14:47,513 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-12-02 13:14:47,513 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2024-12-02 13:14:47,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 13:14:47,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:47,513 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:47,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:14:47,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:47,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash -304056944, now seen corresponding path program 1 times [2024-12-02 13:14:47,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:47,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676559391] [2024-12-02 13:14:47,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:47,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:47,752 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 13:14:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676559391] [2024-12-02 13:14:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676559391] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:47,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:14:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123076327] [2024-12-02 13:14:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:47,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:14:47,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:47,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:14:47,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:14:47,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:47,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 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 13:14:47,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:47,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:47,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:47,981 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2024-12-02 13:14:47,981 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-12-02 13:14:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3704 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2024-12-02 13:14:47,988 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-12-02 13:14:47,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-12-02 13:14:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:14:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:14:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-12-02 13:14:47,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-12-02 13:14:47,989 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-12-02 13:14:47,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-12-02 13:14:47,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 13:14:47,992 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2024-12-02 13:14:47,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-12-02 13:14:47,992 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-12-02 13:14:47,993 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2024-12-02 13:14:47,993 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 13:14:47,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:47,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:47,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:14:47,993 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:47,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash -873947199, now seen corresponding path program 1 times [2024-12-02 13:14:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777945738] [2024-12-02 13:14:47,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:48,142 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 13:14:48,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:48,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777945738] [2024-12-02 13:14:48,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777945738] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:48,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955617031] [2024-12-02 13:14:48,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:48,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:48,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:48,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:14:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:48,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 13:14:48,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:48,320 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 13:14:48,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:48,340 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 13:14:48,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955617031] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:48,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:48,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 13:14:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312741736] [2024-12-02 13:14:48,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:48,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 13:14:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:48,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 13:14:48,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 13:14:48,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:48,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 13:14:48,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:48,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:48,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:48,579 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2024-12-02 13:14:48,579 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-12-02 13:14:48,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3704 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2024-12-02 13:14:48,584 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 13:14:48,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2024-12-02 13:14:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:14:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:14:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-12-02 13:14:48,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2024-12-02 13:14:48,586 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2024-12-02 13:14:48,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2024-12-02 13:14:48,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:48,587 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2024-12-02 13:14:48,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-12-02 13:14:48,588 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-12-02 13:14:48,588 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2024-12-02 13:14:48,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 13:14:48,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:48,588 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:48,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:14:48,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:48,789 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:48,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash 730602913, now seen corresponding path program 2 times [2024-12-02 13:14:48,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:48,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257707757] [2024-12-02 13:14:48,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:14:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:48,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 13:14:48,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:14:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:49,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257707757] [2024-12-02 13:14:49,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257707757] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:49,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:49,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:14:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524762290] [2024-12-02 13:14:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:49,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:49,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:49,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:49,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:49,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 13:14:49,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:49,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:49,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:49,450 INFO L124 PetriNetUnfolderBase]: 1435/2062 cut-off events. [2024-12-02 13:14:49,451 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-12-02 13:14:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2062 events. 1435/2062 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8210 event pairs, 608 based on Foata normal form. 1/1719 useless extension candidates. Maximal degree in co-relation 4192. Up to 1140 conditions per place. [2024-12-02 13:14:49,461 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-12-02 13:14:49,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 315 flow [2024-12-02 13:14:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-12-02 13:14:49,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-12-02 13:14:49,462 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 4 states and 82 transitions. [2024-12-02 13:14:49,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 315 flow [2024-12-02 13:14:49,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 305 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-12-02 13:14:49,464 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2024-12-02 13:14:49,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-12-02 13:14:49,465 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-12-02 13:14:49,465 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2024-12-02 13:14:49,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 13:14:49,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:49,466 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:49,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 13:14:49,466 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:49,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1021222474, now seen corresponding path program 1 times [2024-12-02 13:14:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:49,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979137768] [2024-12-02 13:14:49,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:49,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 13:14:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979137768] [2024-12-02 13:14:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979137768] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:14:49,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:14:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:14:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281916150] [2024-12-02 13:14:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:49,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:14:49,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:49,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:14:49,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:14:49,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:49,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 13:14:49,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:49,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:49,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:14:50,252 INFO L124 PetriNetUnfolderBase]: 2206/3150 cut-off events. [2024-12-02 13:14:50,252 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-12-02 13:14:50,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 3150 events. 2206/3150 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13373 event pairs, 983 based on Foata normal form. 1/2794 useless extension candidates. Maximal degree in co-relation 6940. Up to 1767 conditions per place. [2024-12-02 13:14:50,262 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 47 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-12-02 13:14:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 336 flow [2024-12-02 13:14:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:14:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:14:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-12-02 13:14:50,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-12-02 13:14:50,264 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 4 states and 79 transitions. [2024-12-02 13:14:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 336 flow [2024-12-02 13:14:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 328 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-12-02 13:14:50,266 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 112 flow [2024-12-02 13:14:50,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-12-02 13:14:50,267 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-12-02 13:14:50,267 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 112 flow [2024-12-02 13:14:50,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 13:14:50,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:50,267 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:14:50,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 13:14:50,268 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:50,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2088580279, now seen corresponding path program 1 times [2024-12-02 13:14:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:50,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61773025] [2024-12-02 13:14:50,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:50,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:14:51,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:51,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61773025] [2024-12-02 13:14:51,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61773025] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:51,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369667187] [2024-12-02 13:14:51,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:14:51,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:51,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:51,354 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:51,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:14:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:14:51,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 13:14:51,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:51,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 114 [2024-12-02 13:14:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:14:53,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:54,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:14:54,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 107 [2024-12-02 13:14:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:14:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369667187] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:14:54,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:14:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 13:14:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666574918] [2024-12-02 13:14:54,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:14:54,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 13:14:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:54,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 13:14:54,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-12-02 13:14:54,585 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:14:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 112 flow. Second operand has 28 states, 28 states have (on average 6.928571428571429) internal successors, (194), 28 states have internal predecessors, (194), 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 13:14:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:14:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:15:03,894 INFO L124 PetriNetUnfolderBase]: 10891/15771 cut-off events. [2024-12-02 13:15:03,894 INFO L125 PetriNetUnfolderBase]: For 3313/3313 co-relation queries the response was YES. [2024-12-02 13:15:03,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36191 conditions, 15771 events. 10891/15771 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 87344 event pairs, 694 based on Foata normal form. 10/14829 useless extension candidates. Maximal degree in co-relation 36180. Up to 1983 conditions per place. [2024-12-02 13:15:03,950 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 466 selfloop transitions, 144 changer transitions 88/699 dead transitions. [2024-12-02 13:15:03,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 699 transitions, 3259 flow [2024-12-02 13:15:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-12-02 13:15:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-12-02 13:15:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 921 transitions. [2024-12-02 13:15:03,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44883040935672514 [2024-12-02 13:15:03,956 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 112 flow. Second operand 57 states and 921 transitions. [2024-12-02 13:15:03,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 699 transitions, 3259 flow [2024-12-02 13:15:03,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 699 transitions, 3201 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-12-02 13:15:03,967 INFO L231 Difference]: Finished difference. Result has 121 places, 198 transitions, 1124 flow [2024-12-02 13:15:03,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1124, PETRI_PLACES=121, PETRI_TRANSITIONS=198} [2024-12-02 13:15:03,968 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 86 predicate places. [2024-12-02 13:15:03,968 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 198 transitions, 1124 flow [2024-12-02 13:15:03,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.928571428571429) internal successors, (194), 28 states have internal predecessors, (194), 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 13:15:03,968 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:15:03,968 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:15:03,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:15:04,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:04,169 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:15:04,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:15:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash 371077109, now seen corresponding path program 2 times [2024-12-02 13:15:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:15:04,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433644912] [2024-12-02 13:15:04,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:15:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:15:04,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:15:04,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:04,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:15:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433644912] [2024-12-02 13:15:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433644912] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:15:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021153167] [2024-12-02 13:15:04,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:15:04,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:15:04,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:15:04,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:15:04,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:15:04,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:04,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 13:15:05,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:15:05,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2024-12-02 13:15:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:05,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:15:07,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:15:07,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 107 [2024-12-02 13:15:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:07,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021153167] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:15:07,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:15:07,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2024-12-02 13:15:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019805861] [2024-12-02 13:15:07,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:15:07,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 13:15:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:15:07,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 13:15:07,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-12-02 13:15:07,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:15:07,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 198 transitions, 1124 flow. Second operand has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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 13:15:07,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:15:07,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:15:07,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:15:14,199 INFO L124 PetriNetUnfolderBase]: 19161/27764 cut-off events. [2024-12-02 13:15:14,199 INFO L125 PetriNetUnfolderBase]: For 145539/145539 co-relation queries the response was YES. [2024-12-02 13:15:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97608 conditions, 27764 events. 19161/27764 cut-off events. For 145539/145539 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 169183 event pairs, 3605 based on Foata normal form. 7/27771 useless extension candidates. Maximal degree in co-relation 97574. Up to 4090 conditions per place. [2024-12-02 13:15:14,360 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 481 selfloop transitions, 166 changer transitions 73/721 dead transitions. [2024-12-02 13:15:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 721 transitions, 5314 flow [2024-12-02 13:15:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-12-02 13:15:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-12-02 13:15:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 625 transitions. [2024-12-02 13:15:14,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-12-02 13:15:14,363 INFO L175 Difference]: Start difference. First operand has 121 places, 198 transitions, 1124 flow. Second operand 40 states and 625 transitions. [2024-12-02 13:15:14,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 721 transitions, 5314 flow [2024-12-02 13:15:15,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 721 transitions, 4925 flow, removed 171 selfloop flow, removed 11 redundant places. [2024-12-02 13:15:15,652 INFO L231 Difference]: Finished difference. Result has 159 places, 324 transitions, 2518 flow [2024-12-02 13:15:15,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2518, PETRI_PLACES=159, PETRI_TRANSITIONS=324} [2024-12-02 13:15:15,653 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 124 predicate places. [2024-12-02 13:15:15,653 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 324 transitions, 2518 flow [2024-12-02 13:15:15,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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 13:15:15,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:15:15,653 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:15:15,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:15:15,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:15,854 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:15:15,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:15:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1760279771, now seen corresponding path program 3 times [2024-12-02 13:15:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:15:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046989698] [2024-12-02 13:15:15,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:15:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:15:15,894 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:15:15,894 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:15:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046989698] [2024-12-02 13:15:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046989698] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:15:16,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082510257] [2024-12-02 13:15:16,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:15:16,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:15:16,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:15:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:15:17,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:15:17,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:17,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 13:15:17,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:15:17,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-12-02 13:15:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:17,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:15:18,616 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 13:15:18,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 56 [2024-12-02 13:15:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:18,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082510257] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:15:18,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:15:18,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2024-12-02 13:15:18,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191146824] [2024-12-02 13:15:18,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:15:18,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 13:15:18,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:15:18,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 13:15:18,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-12-02 13:15:18,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:15:18,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 324 transitions, 2518 flow. Second operand has 29 states, 29 states have (on average 6.896551724137931) internal successors, (200), 29 states have internal predecessors, (200), 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 13:15:18,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:15:18,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:15:18,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:15:24,674 INFO L124 PetriNetUnfolderBase]: 25585/37220 cut-off events. [2024-12-02 13:15:24,674 INFO L125 PetriNetUnfolderBase]: For 320038/320038 co-relation queries the response was YES. [2024-12-02 13:15:24,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148735 conditions, 37220 events. 25585/37220 cut-off events. For 320038/320038 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 238473 event pairs, 5445 based on Foata normal form. 1/37221 useless extension candidates. Maximal degree in co-relation 148692. Up to 8770 conditions per place. [2024-12-02 13:15:24,961 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 426 selfloop transitions, 296 changer transitions 14/737 dead transitions. [2024-12-02 13:15:24,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 737 transitions, 7319 flow [2024-12-02 13:15:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 13:15:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 13:15:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 339 transitions. [2024-12-02 13:15:24,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-12-02 13:15:24,962 INFO L175 Difference]: Start difference. First operand has 159 places, 324 transitions, 2518 flow. Second operand 21 states and 339 transitions. [2024-12-02 13:15:24,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 737 transitions, 7319 flow [2024-12-02 13:15:34,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 737 transitions, 6130 flow, removed 593 selfloop flow, removed 7 redundant places. [2024-12-02 13:15:34,446 INFO L231 Difference]: Finished difference. Result has 177 places, 473 transitions, 4154 flow [2024-12-02 13:15:34,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4154, PETRI_PLACES=177, PETRI_TRANSITIONS=473} [2024-12-02 13:15:34,447 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 142 predicate places. [2024-12-02 13:15:34,447 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 473 transitions, 4154 flow [2024-12-02 13:15:34,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.896551724137931) internal successors, (200), 29 states have internal predecessors, (200), 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 13:15:34,447 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:15:34,447 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:15:34,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:15:34,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:34,648 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:15:34,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:15:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1258881769, now seen corresponding path program 4 times [2024-12-02 13:15:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:15:34,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544589500] [2024-12-02 13:15:34,649 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:15:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:15:34,678 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:15:34,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:35,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:15:35,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544589500] [2024-12-02 13:15:35,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544589500] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:15:35,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518731471] [2024-12-02 13:15:35,317 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:15:35,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:35,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:15:35,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:15:35,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:15:35,434 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:15:35,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:35,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 13:15:35,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:15:35,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 125 [2024-12-02 13:15:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:36,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:15:36,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:15:36,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 94 [2024-12-02 13:15:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518731471] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:15:36,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:15:36,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-12-02 13:15:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706811323] [2024-12-02 13:15:36,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:15:36,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 13:15:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:15:36,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 13:15:36,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-12-02 13:15:36,895 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:15:36,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 473 transitions, 4154 flow. Second operand has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 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 13:15:36,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:15:36,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:15:36,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:15:44,410 INFO L124 PetriNetUnfolderBase]: 28608/41754 cut-off events. [2024-12-02 13:15:44,411 INFO L125 PetriNetUnfolderBase]: For 324806/324806 co-relation queries the response was YES. [2024-12-02 13:15:44,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170084 conditions, 41754 events. 28608/41754 cut-off events. For 324806/324806 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 274276 event pairs, 8715 based on Foata normal form. 8/41762 useless extension candidates. Maximal degree in co-relation 170036. Up to 15507 conditions per place. [2024-12-02 13:15:44,739 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 530 selfloop transitions, 248 changer transitions 77/856 dead transitions. [2024-12-02 13:15:44,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 856 transitions, 8889 flow [2024-12-02 13:15:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 13:15:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 13:15:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 492 transitions. [2024-12-02 13:15:44,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-12-02 13:15:44,741 INFO L175 Difference]: Start difference. First operand has 177 places, 473 transitions, 4154 flow. Second operand 31 states and 492 transitions. [2024-12-02 13:15:44,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 856 transitions, 8889 flow [2024-12-02 13:15:49,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 856 transitions, 8517 flow, removed 159 selfloop flow, removed 3 redundant places. [2024-12-02 13:15:49,906 INFO L231 Difference]: Finished difference. Result has 218 places, 523 transitions, 5205 flow [2024-12-02 13:15:49,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5205, PETRI_PLACES=218, PETRI_TRANSITIONS=523} [2024-12-02 13:15:49,907 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-12-02 13:15:49,907 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 523 transitions, 5205 flow [2024-12-02 13:15:49,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 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 13:15:49,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:15:49,907 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:15:49,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:15:50,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:50,108 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:15:50,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:15:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1301818517, now seen corresponding path program 5 times [2024-12-02 13:15:50,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:15:50,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264312519] [2024-12-02 13:15:50,108 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:15:50,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:15:50,145 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 13:15:50,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:15:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:15:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264312519] [2024-12-02 13:15:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264312519] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:15:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997879293] [2024-12-02 13:15:50,713 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:15:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:15:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:15:50,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:15:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:15:50,828 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 13:15:50,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:15:50,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-02 13:15:50,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:15:50,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:15:50,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 13:15:50,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 13:15:51,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2024-12-02 13:15:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:15:51,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:15:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:15:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997879293] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:15:52,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:15:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 26 [2024-12-02 13:15:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031911976] [2024-12-02 13:15:52,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:15:52,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 13:15:52,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:15:52,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 13:15:52,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-12-02 13:15:52,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:15:52,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 523 transitions, 5205 flow. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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 13:15:52,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:15:52,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:15:52,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:16:13,085 INFO L124 PetriNetUnfolderBase]: 67460/97862 cut-off events. [2024-12-02 13:16:13,085 INFO L125 PetriNetUnfolderBase]: For 861636/861636 co-relation queries the response was YES. [2024-12-02 13:16:13,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418121 conditions, 97862 events. 67460/97862 cut-off events. For 861636/861636 co-relation queries the response was YES. Maximal size of possible extension queue 3168. Compared 708374 event pairs, 7830 based on Foata normal form. 30/97892 useless extension candidates. Maximal degree in co-relation 418059. Up to 15468 conditions per place. [2024-12-02 13:16:14,074 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 871 selfloop transitions, 773 changer transitions 317/1962 dead transitions. [2024-12-02 13:16:14,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1962 transitions, 21683 flow [2024-12-02 13:16:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-12-02 13:16:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-12-02 13:16:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1027 transitions. [2024-12-02 13:16:14,077 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43223905723905726 [2024-12-02 13:16:14,077 INFO L175 Difference]: Start difference. First operand has 218 places, 523 transitions, 5205 flow. Second operand 66 states and 1027 transitions. [2024-12-02 13:16:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1962 transitions, 21683 flow [2024-12-02 13:16:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1962 transitions, 20822 flow, removed 375 selfloop flow, removed 9 redundant places. [2024-12-02 13:16:39,052 INFO L231 Difference]: Finished difference. Result has 308 places, 1051 transitions, 13572 flow [2024-12-02 13:16:39,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=13572, PETRI_PLACES=308, PETRI_TRANSITIONS=1051} [2024-12-02 13:16:39,053 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 273 predicate places. [2024-12-02 13:16:39,053 INFO L471 AbstractCegarLoop]: Abstraction has has 308 places, 1051 transitions, 13572 flow [2024-12-02 13:16:39,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 26 states have internal predecessors, (179), 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 13:16:39,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:16:39,054 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:16:39,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:16:39,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 13:16:39,254 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:16:39,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:16:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1548064345, now seen corresponding path program 6 times [2024-12-02 13:16:39,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:16:39,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514275343] [2024-12-02 13:16:39,255 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:16:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:16:39,293 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:16:39,293 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:16:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:16:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:16:40,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514275343] [2024-12-02 13:16:40,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514275343] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:16:40,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030475732] [2024-12-02 13:16:40,062 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:16:40,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:16:40,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:16:40,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:16:40,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:16:40,168 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 13:16:40,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:16:40,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 13:16:40,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:16:40,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 81 [2024-12-02 13:16:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:16:40,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:16:41,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:16:41,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 62 [2024-12-02 13:16:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:16:41,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030475732] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:16:41,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:16:41,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-12-02 13:16:41,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587868544] [2024-12-02 13:16:41,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:16:41,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 13:16:41,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:16:41,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 13:16:41,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-12-02 13:16:41,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:16:41,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 1051 transitions, 13572 flow. Second operand has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 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 13:16:41,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:16:41,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:16:41,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:17:11,074 INFO L124 PetriNetUnfolderBase]: 69560/101333 cut-off events. [2024-12-02 13:17:11,074 INFO L125 PetriNetUnfolderBase]: For 1506974/1506974 co-relation queries the response was YES. [2024-12-02 13:17:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502740 conditions, 101333 events. 69560/101333 cut-off events. For 1506974/1506974 co-relation queries the response was YES. Maximal size of possible extension queue 3335. Compared 744816 event pairs, 28652 based on Foata normal form. 5/101338 useless extension candidates. Maximal degree in co-relation 502645. Up to 48591 conditions per place. [2024-12-02 13:17:12,605 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1219 selfloop transitions, 386 changer transitions 40/1646 dead transitions. [2024-12-02 13:17:12,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1646 transitions, 22755 flow [2024-12-02 13:17:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 13:17:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-12-02 13:17:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 451 transitions. [2024-12-02 13:17:12,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41759259259259257 [2024-12-02 13:17:12,607 INFO L175 Difference]: Start difference. First operand has 308 places, 1051 transitions, 13572 flow. Second operand 30 states and 451 transitions. [2024-12-02 13:17:12,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1646 transitions, 22755 flow [2024-12-02 13:18:13,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1646 transitions, 22113 flow, removed 298 selfloop flow, removed 18 redundant places. [2024-12-02 13:18:13,700 INFO L231 Difference]: Finished difference. Result has 318 places, 1171 transitions, 15779 flow [2024-12-02 13:18:13,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=13088, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15779, PETRI_PLACES=318, PETRI_TRANSITIONS=1171} [2024-12-02 13:18:13,701 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 283 predicate places. [2024-12-02 13:18:13,701 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 1171 transitions, 15779 flow [2024-12-02 13:18:13,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 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 13:18:13,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:18:13,702 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:18:13,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-02 13:18:13,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 13:18:13,903 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:18:13,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:18:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2028301787, now seen corresponding path program 7 times [2024-12-02 13:18:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:18:13,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773610249] [2024-12-02 13:18:13,904 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:18:13,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:18:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:18:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:18:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:18:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773610249] [2024-12-02 13:18:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773610249] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:18:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222903187] [2024-12-02 13:18:14,792 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:18:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:18:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:18:14,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:18:14,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:18:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:18:14,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 13:18:14,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:18:15,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 129 [2024-12-02 13:18:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:18:16,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:18:18,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:18:18,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 90 [2024-12-02 13:18:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:18:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222903187] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:18:18,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:18:18,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-12-02 13:18:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881974831] [2024-12-02 13:18:18,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:18:18,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 13:18:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:18:18,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 13:18:18,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-12-02 13:18:18,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:18:18,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1171 transitions, 15779 flow. Second operand has 28 states, 28 states have (on average 6.892857142857143) internal successors, (193), 28 states have internal predecessors, (193), 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 13:18:18,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:18:18,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:18:18,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:19:08,465 INFO L124 PetriNetUnfolderBase]: 90411/132827 cut-off events. [2024-12-02 13:19:08,465 INFO L125 PetriNetUnfolderBase]: For 2063910/2063910 co-relation queries the response was YES. [2024-12-02 13:19:11,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676803 conditions, 132827 events. 90411/132827 cut-off events. For 2063910/2063910 co-relation queries the response was YES. Maximal size of possible extension queue 4165. Compared 1015670 event pairs, 16170 based on Foata normal form. 17/132844 useless extension candidates. Maximal degree in co-relation 676701. Up to 32966 conditions per place. [2024-12-02 13:19:11,671 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1547 selfloop transitions, 856 changer transitions 79/2483 dead transitions. [2024-12-02 13:19:11,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2483 transitions, 34727 flow [2024-12-02 13:19:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 13:19:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-12-02 13:19:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1007 transitions. [2024-12-02 13:19:11,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4370659722222222 [2024-12-02 13:19:11,675 INFO L175 Difference]: Start difference. First operand has 318 places, 1171 transitions, 15779 flow. Second operand 64 states and 1007 transitions. [2024-12-02 13:19:11,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2483 transitions, 34727 flow [2024-12-02 13:20:52,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 2483 transitions, 34197 flow, removed 243 selfloop flow, removed 7 redundant places. [2024-12-02 13:20:52,655 INFO L231 Difference]: Finished difference. Result has 410 places, 1503 transitions, 23508 flow [2024-12-02 13:20:52,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=15425, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=23508, PETRI_PLACES=410, PETRI_TRANSITIONS=1503} [2024-12-02 13:20:52,656 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 375 predicate places. [2024-12-02 13:20:52,656 INFO L471 AbstractCegarLoop]: Abstraction has has 410 places, 1503 transitions, 23508 flow [2024-12-02 13:20:52,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.892857142857143) internal successors, (193), 28 states have internal predecessors, (193), 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 13:20:52,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:20:52,657 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:20:52,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-02 13:20:52,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:20:52,858 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:20:52,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:20:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1165005275, now seen corresponding path program 8 times [2024-12-02 13:20:52,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:20:52,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12304997] [2024-12-02 13:20:52,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:20:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:20:52,890 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:20:52,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:20:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:20:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:20:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12304997] [2024-12-02 13:20:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12304997] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:20:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43205262] [2024-12-02 13:20:53,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:20:53,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:20:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:20:53,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:20:53,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:20:53,558 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:20:53,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:20:53,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 13:20:53,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:20:53,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 71 [2024-12-02 13:20:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:20:54,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:20:55,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:20:55,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 108 [2024-12-02 13:20:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:20:55,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43205262] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:20:55,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:20:55,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-12-02 13:20:55,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265406160] [2024-12-02 13:20:55,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:20:55,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 13:20:55,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:20:55,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 13:20:55,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-12-02 13:20:55,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:20:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1503 transitions, 23508 flow. Second operand has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 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 13:20:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:20:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:20:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:21:45,533 INFO L124 PetriNetUnfolderBase]: 99901/147174 cut-off events. [2024-12-02 13:21:45,533 INFO L125 PetriNetUnfolderBase]: For 3607434/3607434 co-relation queries the response was YES. [2024-12-02 13:21:48,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853939 conditions, 147174 events. 99901/147174 cut-off events. For 3607434/3607434 co-relation queries the response was YES. Maximal size of possible extension queue 4794. Compared 1152882 event pairs, 37888 based on Foata normal form. 17/147191 useless extension candidates. Maximal degree in co-relation 853801. Up to 69375 conditions per place. [2024-12-02 13:21:48,938 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1237 selfloop transitions, 835 changer transitions 104/2177 dead transitions. [2024-12-02 13:21:48,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2177 transitions, 35789 flow [2024-12-02 13:21:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-12-02 13:21:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-12-02 13:21:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 766 transitions. [2024-12-02 13:21:48,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41721132897603486 [2024-12-02 13:21:48,941 INFO L175 Difference]: Start difference. First operand has 410 places, 1503 transitions, 23508 flow. Second operand 51 states and 766 transitions. [2024-12-02 13:21:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2177 transitions, 35789 flow [2024-12-02 13:24:58,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 2177 transitions, 32859 flow, removed 1309 selfloop flow, removed 14 redundant places. [2024-12-02 13:24:58,145 INFO L231 Difference]: Finished difference. Result has 468 places, 1671 transitions, 26909 flow [2024-12-02 13:24:58,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=21376, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=26909, PETRI_PLACES=468, PETRI_TRANSITIONS=1671} [2024-12-02 13:24:58,146 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 433 predicate places. [2024-12-02 13:24:58,146 INFO L471 AbstractCegarLoop]: Abstraction has has 468 places, 1671 transitions, 26909 flow [2024-12-02 13:24:58,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.689655172413793) internal successors, (194), 29 states have internal predecessors, (194), 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 13:24:58,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:24:58,147 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:24:58,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-12-02 13:24:58,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:24:58,347 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:24:58,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:24:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1509946657, now seen corresponding path program 9 times [2024-12-02 13:24:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:24:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594642237] [2024-12-02 13:24:58,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:24:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:24:58,372 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:24:58,372 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:24:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:24:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:24:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594642237] [2024-12-02 13:24:58,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594642237] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:24:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534285065] [2024-12-02 13:24:58,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:24:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:24:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:24:58,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:24:58,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d36795-4c06-428f-8315-f2e0faa87f2b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:24:58,970 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:24:58,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:24:58,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 13:24:58,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:24:59,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 116 [2024-12-02 13:25:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:25:00,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:25:01,157 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 13:25:01,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 120 [2024-12-02 13:25:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 13:25:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534285065] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:25:01,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:25:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2024-12-02 13:25:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662200387] [2024-12-02 13:25:01,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:25:01,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 13:25:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:25:01,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 13:25:01,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-12-02 13:25:01,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-12-02 13:25:01,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1671 transitions, 26909 flow. Second operand has 26 states, 26 states have (on average 7.038461538461538) internal successors, (183), 26 states have internal predecessors, (183), 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 13:25:01,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:25:01,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-12-02 13:25:01,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:26:00,163 INFO L124 PetriNetUnfolderBase]: 100774/148648 cut-off events. [2024-12-02 13:26:00,163 INFO L125 PetriNetUnfolderBase]: For 3992904/3992904 co-relation queries the response was YES. [2024-12-02 13:26:03,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875695 conditions, 148648 events. 100774/148648 cut-off events. For 3992904/3992904 co-relation queries the response was YES. Maximal size of possible extension queue 4832. Compared 1164070 event pairs, 19692 based on Foata normal form. 19/148667 useless extension candidates. Maximal degree in co-relation 875539. Up to 40572 conditions per place. [2024-12-02 13:26:03,661 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 1152 selfloop transitions, 1187 changer transitions 104/2444 dead transitions. [2024-12-02 13:26:03,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 2444 transitions, 39844 flow [2024-12-02 13:26:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-12-02 13:26:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-12-02 13:26:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 914 transitions. [2024-12-02 13:26:03,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49782135076252726 [2024-12-02 13:26:03,664 INFO L175 Difference]: Start difference. First operand has 468 places, 1671 transitions, 26909 flow. Second operand 51 states and 914 transitions. [2024-12-02 13:26:03,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 2444 transitions, 39844 flow