./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme --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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:45:19,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:45:19,442 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:45:19,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:45:19,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:45:19,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:45:19,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:45:19,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:45:19,500 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:45:19,505 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:45:19,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:45:19,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:45:19,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:45:19,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:45:19,509 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:45:19,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:45:19,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:45:19,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:45:19,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:45:19,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:45:19,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:45:19,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:45:19,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:45:19,514 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:45:19,515 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:45:19,515 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:45:19,515 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:45:19,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:45:19,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:45:19,518 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:45:19,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:45:19,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:19,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:45:19,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:45:19,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:45:19,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:45:19,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:45:19,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:45:19,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:45:19,522 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:45:19,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:45:19,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:45:19,523 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2023-11-26 11:45:19,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:45:19,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:45:19,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:45:19,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:45:19,885 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:45:19,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/queue.i [2023-11-26 11:45:23,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:45:23,595 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:45:23,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i [2023-11-26 11:45:23,621 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/data/d7daaafd7/52898fbcc99b4b068d7a944382fa0d3e/FLAG82b651eaa [2023-11-26 11:45:23,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/data/d7daaafd7/52898fbcc99b4b068d7a944382fa0d3e [2023-11-26 11:45:23,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:45:23,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:45:23,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:23,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:45:23,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:45:23,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:23" (1/1) ... [2023-11-26 11:45:23,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37596e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:23, skipping insertion in model container [2023-11-26 11:45:23,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:23" (1/1) ... [2023-11-26 11:45:23,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:45:24,456 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43284,43297] [2023-11-26 11:45:24,469 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43491,43504] [2023-11-26 11:45:24,476 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43772,43785] [2023-11-26 11:45:24,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:24,506 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:45:24,597 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43284,43297] [2023-11-26 11:45:24,599 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43491,43504] [2023-11-26 11:45:24,602 WARN L240 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_b095c1fa-eafb-44fc-8ca3-638805d76fc5/sv-benchmarks/c/pthread/queue.i[43772,43785] [2023-11-26 11:45:24,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:24,708 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:45:24,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24 WrapperNode [2023-11-26 11:45:24,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:24,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:24,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:45:24,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:45:24,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,836 INFO L138 Inliner]: procedures = 275, calls = 71, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 260 [2023-11-26 11:45:24,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:24,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:45:24,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:45:24,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:45:24,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,906 INFO L175 MemorySlicer]: Split 55 memory accesses to 7 slices as follows [2, 2, 8, 5, 2, 4, 32]. 58 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 0, 8, 5, 0, 0, 0]. The 20 writes are split as follows [0, 1, 0, 0, 1, 3, 15]. [2023-11-26 11:45:24,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,944 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:45:24,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:45:24,946 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:45:24,946 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:45:24,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (1/1) ... [2023-11-26 11:45:24,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:24,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:45:25,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:45:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:45:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:45:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:45:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:45:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:45:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:45:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:45:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:45:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:45:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:45:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:45:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:45:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:45:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 11:45:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:45:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:45:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:45:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:45:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:45:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:45:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 11:45:25,058 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:45:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:45:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:45:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:45:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:45:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:45:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:45:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:45:25,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:45:25,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:45:25,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:45:25,068 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:45:25,321 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:45:25,324 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:45:25,899 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:45:26,472 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:45:26,472 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:45:26,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:26 BoogieIcfgContainer [2023-11-26 11:45:26,473 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:45:26,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:45:26,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:45:26,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:45:26,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:23" (1/3) ... [2023-11-26 11:45:26,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb153d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:26, skipping insertion in model container [2023-11-26 11:45:26,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:24" (2/3) ... [2023-11-26 11:45:26,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb153d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:26, skipping insertion in model container [2023-11-26 11:45:26,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:26" (3/3) ... [2023-11-26 11:45:26,532 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-11-26 11:45:26,545 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:45:26,559 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:45:26,559 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-26 11:45:26,559 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:45:26,654 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:45:26,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 47 transitions, 108 flow [2023-11-26 11:45:26,758 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2023-11-26 11:45:26,759 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:26,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 7/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-26 11:45:26,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 47 transitions, 108 flow [2023-11-26 11:45:26,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 43 transitions, 95 flow [2023-11-26 11:45:26,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:45:26,802 INFO L357 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, mHoare=true, 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;@45ea86da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:45:26,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:45:26,809 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:45:26,811 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:45:26,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:45:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:45:26,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:26,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash 663893, now seen corresponding path program 1 times [2023-11-26 11:45:26,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:26,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201083145] [2023-11-26 11:45:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:26,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201083145] [2023-11-26 11:45:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201083145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:27,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757400450] [2023-11-26 11:45:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:27,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:45:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:45:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:45:27,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:27,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 95 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2023-11-26 11:45:27,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:27,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:27,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:27,482 INFO L124 PetriNetUnfolderBase]: 435/786 cut-off events. [2023-11-26 11:45:27,482 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-26 11:45:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 786 events. 435/786 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3576 event pairs, 339 based on Foata normal form. 48/744 useless extension candidates. Maximal degree in co-relation 1440. Up to 712 conditions per place. [2023-11-26 11:45:27,501 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 31 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-11-26 11:45:27,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 147 flow [2023-11-26 11:45:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:45:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 11:45:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2023-11-26 11:45:27,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-11-26 11:45:27,519 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 54 transitions. [2023-11-26 11:45:27,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 54 transitions. [2023-11-26 11:45:27,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:27,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 54 transitions. [2023-11-26 11:45:27,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2023-11-26 11:45:27,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-11-26 11:45:27,531 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-11-26 11:45:27,533 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 95 flow. Second operand 2 states and 54 transitions. [2023-11-26 11:45:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 147 flow [2023-11-26 11:45:27,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:27,542 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 80 flow [2023-11-26 11:45:27,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-26 11:45:27,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-11-26 11:45:27,549 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 80 flow [2023-11-26 11:45:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2023-11-26 11:45:27,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:27,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:27,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:45:27,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:27,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash 535466999, now seen corresponding path program 1 times [2023-11-26 11:45:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:27,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11976688] [2023-11-26 11:45:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:27,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11976688] [2023-11-26 11:45:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11976688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:27,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826694898] [2023-11-26 11:45:27,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:27,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:27,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:27,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-26 11:45:27,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:27,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:27,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:28,154 INFO L124 PetriNetUnfolderBase]: 415/766 cut-off events. [2023-11-26 11:45:28,154 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-26 11:45:28,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 766 events. 415/766 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3606 event pairs, 312 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 1484. Up to 642 conditions per place. [2023-11-26 11:45:28,162 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-26 11:45:28,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 188 flow [2023-11-26 11:45:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2023-11-26 11:45:28,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2023-11-26 11:45:28,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2023-11-26 11:45:28,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2023-11-26 11:45:28,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:28,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2023-11-26 11:45:28,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-11-26 11:45:28,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:28,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:28,180 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 80 flow. Second operand 3 states and 73 transitions. [2023-11-26 11:45:28,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 188 flow [2023-11-26 11:45:28,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:45:28,187 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2023-11-26 11:45:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-26 11:45:28,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-26 11:45:28,189 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2023-11-26 11:45:28,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-26 11:45:28,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:28,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:28,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:45:28,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:28,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -580390538, now seen corresponding path program 1 times [2023-11-26 11:45:28,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:28,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502230570] [2023-11-26 11:45:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:28,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:29,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502230570] [2023-11-26 11:45:29,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502230570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:29,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:29,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294645704] [2023-11-26 11:45:29,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:29,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:29,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-26 11:45:29,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:29,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:29,657 INFO L124 PetriNetUnfolderBase]: 690/1269 cut-off events. [2023-11-26 11:45:29,657 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-26 11:45:29,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1269 events. 690/1269 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6384 event pairs, 74 based on Foata normal form. 0/1207 useless extension candidates. Maximal degree in co-relation 2480. Up to 678 conditions per place. [2023-11-26 11:45:29,668 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 72 selfloop transitions, 10 changer transitions 3/92 dead transitions. [2023-11-26 11:45:29,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 92 transitions, 375 flow [2023-11-26 11:45:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:45:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2023-11-26 11:45:29,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2023-11-26 11:45:29,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 147 transitions. [2023-11-26 11:45:29,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 147 transitions. [2023-11-26 11:45:29,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:29,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 147 transitions. [2023-11-26 11:45:29,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 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) [2023-11-26 11:45:29,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-26 11:45:29,682 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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) [2023-11-26 11:45:29,682 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 6 states and 147 transitions. [2023-11-26 11:45:29,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 92 transitions, 375 flow [2023-11-26 11:45:29,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 92 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:29,688 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 146 flow [2023-11-26 11:45:29,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-11-26 11:45:29,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-11-26 11:45:29,691 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 146 flow [2023-11-26 11:45:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-26 11:45:29,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:29,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:29,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:29,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:29,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:29,693 INFO L85 PathProgramCache]: Analyzing trace with hash -497092650, now seen corresponding path program 1 times [2023-11-26 11:45:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444676456] [2023-11-26 11:45:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444676456] [2023-11-26 11:45:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444676456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:29,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:29,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216309006] [2023-11-26 11:45:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:29,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:29,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:29,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:29,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-11-26 11:45:29,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:29,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:30,095 INFO L124 PetriNetUnfolderBase]: 440/849 cut-off events. [2023-11-26 11:45:30,096 INFO L125 PetriNetUnfolderBase]: For 152/155 co-relation queries the response was YES. [2023-11-26 11:45:30,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 849 events. 440/849 cut-off events. For 152/155 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3789 event pairs, 226 based on Foata normal form. 30/854 useless extension candidates. Maximal degree in co-relation 1746. Up to 436 conditions per place. [2023-11-26 11:45:30,103 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 37 selfloop transitions, 4 changer transitions 4/51 dead transitions. [2023-11-26 11:45:30,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 221 flow [2023-11-26 11:45:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-26 11:45:30,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-11-26 11:45:30,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-26 11:45:30,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-26 11:45:30,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:30,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-26 11:45:30,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-11-26 11:45:30,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:30,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:30,108 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 146 flow. Second operand 3 states and 75 transitions. [2023-11-26 11:45:30,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 221 flow [2023-11-26 11:45:30,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:30,111 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 108 flow [2023-11-26 11:45:30,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-26 11:45:30,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-26 11:45:30,113 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 108 flow [2023-11-26 11:45:30,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-11-26 11:45:30,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:30,113 INFO L208 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] [2023-11-26 11:45:30,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:45:30,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:30,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:30,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1625196355, now seen corresponding path program 1 times [2023-11-26 11:45:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:30,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714717451] [2023-11-26 11:45:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:30,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714717451] [2023-11-26 11:45:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714717451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159303375] [2023-11-26 11:45:30,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:30,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:30,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:30,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:30,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:30,451 INFO L124 PetriNetUnfolderBase]: 265/580 cut-off events. [2023-11-26 11:45:30,451 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-26 11:45:30,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 580 events. 265/580 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2355 event pairs, 91 based on Foata normal form. 32/601 useless extension candidates. Maximal degree in co-relation 1191. Up to 266 conditions per place. [2023-11-26 11:45:30,457 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 35 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-26 11:45:30,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 215 flow [2023-11-26 11:45:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-26 11:45:30,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-11-26 11:45:30,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-26 11:45:30,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-26 11:45:30,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:30,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-26 11:45:30,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2023-11-26 11:45:30,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:30,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2023-11-26 11:45:30,461 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 108 flow. Second operand 3 states and 72 transitions. [2023-11-26 11:45:30,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 215 flow [2023-11-26 11:45:30,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 205 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:30,466 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 110 flow [2023-11-26 11:45:30,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-26 11:45:30,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-11-26 11:45:30,467 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 110 flow [2023-11-26 11:45:30,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:30,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:30,468 INFO L208 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] [2023-11-26 11:45:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:45:30,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:30,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash -876403870, now seen corresponding path program 1 times [2023-11-26 11:45:30,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:30,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649171756] [2023-11-26 11:45:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:30,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649171756] [2023-11-26 11:45:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649171756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:32,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:32,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:45:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613279323] [2023-11-26 11:45:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:45:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:45:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:32,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:32,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:32,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:32,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:33,391 INFO L124 PetriNetUnfolderBase]: 384/832 cut-off events. [2023-11-26 11:45:33,391 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-26 11:45:33,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 832 events. 384/832 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4057 event pairs, 90 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1812. Up to 288 conditions per place. [2023-11-26 11:45:33,398 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 66 selfloop transitions, 14 changer transitions 12/98 dead transitions. [2023-11-26 11:45:33,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 98 transitions, 475 flow [2023-11-26 11:45:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:45:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2023-11-26 11:45:33,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302600472813239 [2023-11-26 11:45:33,399 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 182 transitions. [2023-11-26 11:45:33,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 182 transitions. [2023-11-26 11:45:33,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:33,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 182 transitions. [2023-11-26 11:45:33,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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) [2023-11-26 11:45:33,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:33,403 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:33,403 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 110 flow. Second operand 9 states and 182 transitions. [2023-11-26 11:45:33,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 98 transitions, 475 flow [2023-11-26 11:45:33,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 98 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:33,407 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 202 flow [2023-11-26 11:45:33,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-26 11:45:33,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-11-26 11:45:33,409 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 202 flow [2023-11-26 11:45:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:33,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:33,409 INFO L208 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] [2023-11-26 11:45:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:45:33,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:33,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1142107678, now seen corresponding path program 2 times [2023-11-26 11:45:33,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:33,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309026130] [2023-11-26 11:45:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:33,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:34,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:34,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309026130] [2023-11-26 11:45:34,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309026130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:34,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:45:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408516033] [2023-11-26 11:45:34,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:34,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:45:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:45:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:34,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:34,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:34,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:34,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:34,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:35,337 INFO L124 PetriNetUnfolderBase]: 501/1098 cut-off events. [2023-11-26 11:45:35,337 INFO L125 PetriNetUnfolderBase]: For 868/869 co-relation queries the response was YES. [2023-11-26 11:45:35,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1098 events. 501/1098 cut-off events. For 868/869 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6171 event pairs, 156 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 2850. Up to 661 conditions per place. [2023-11-26 11:45:35,348 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 15 changer transitions 6/97 dead transitions. [2023-11-26 11:45:35,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 580 flow [2023-11-26 11:45:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:45:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2023-11-26 11:45:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40189125295508277 [2023-11-26 11:45:35,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 170 transitions. [2023-11-26 11:45:35,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 170 transitions. [2023-11-26 11:45:35,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:35,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 170 transitions. [2023-11-26 11:45:35,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 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) [2023-11-26 11:45:35,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:35,355 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:35,356 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 202 flow. Second operand 9 states and 170 transitions. [2023-11-26 11:45:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 580 flow [2023-11-26 11:45:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 562 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:35,366 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 347 flow [2023-11-26 11:45:35,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-26 11:45:35,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2023-11-26 11:45:35,367 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 347 flow [2023-11-26 11:45:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:35,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:35,368 INFO L208 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] [2023-11-26 11:45:35,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:45:35,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:35,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1515695148, now seen corresponding path program 3 times [2023-11-26 11:45:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699683652] [2023-11-26 11:45:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:36,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699683652] [2023-11-26 11:45:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699683652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:36,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:36,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:45:36,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833640458] [2023-11-26 11:45:36,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:36,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:45:36,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:36,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:45:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:37,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 347 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:37,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:37,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:37,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:37,647 INFO L124 PetriNetUnfolderBase]: 642/1414 cut-off events. [2023-11-26 11:45:37,647 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2023-11-26 11:45:37,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3970 conditions, 1414 events. 642/1414 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8193 event pairs, 100 based on Foata normal form. 0/1400 useless extension candidates. Maximal degree in co-relation 3951. Up to 333 conditions per place. [2023-11-26 11:45:37,664 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 84 selfloop transitions, 26 changer transitions 6/122 dead transitions. [2023-11-26 11:45:37,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 122 transitions, 828 flow [2023-11-26 11:45:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:45:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2023-11-26 11:45:37,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-11-26 11:45:37,666 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 183 transitions. [2023-11-26 11:45:37,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 183 transitions. [2023-11-26 11:45:37,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:37,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 183 transitions. [2023-11-26 11:45:37,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 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) [2023-11-26 11:45:37,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:37,669 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:37,670 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 347 flow. Second operand 9 states and 183 transitions. [2023-11-26 11:45:37,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 122 transitions, 828 flow [2023-11-26 11:45:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 782 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-11-26 11:45:37,688 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 446 flow [2023-11-26 11:45:37,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=446, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-26 11:45:37,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2023-11-26 11:45:37,692 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 446 flow [2023-11-26 11:45:37,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:37,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:37,693 INFO L208 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] [2023-11-26 11:45:37,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:45:37,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:37,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:37,694 INFO L85 PathProgramCache]: Analyzing trace with hash -635846680, now seen corresponding path program 4 times [2023-11-26 11:45:37,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:37,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032568072] [2023-11-26 11:45:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:37,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:39,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032568072] [2023-11-26 11:45:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032568072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:39,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:39,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:45:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830901633] [2023-11-26 11:45:39,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:39,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:45:39,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:39,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:45:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:39,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:39,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 446 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:39,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:39,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:39,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:39,817 INFO L124 PetriNetUnfolderBase]: 736/1613 cut-off events. [2023-11-26 11:45:39,818 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2023-11-26 11:45:39,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4842 conditions, 1613 events. 736/1613 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9863 event pairs, 200 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 4819. Up to 739 conditions per place. [2023-11-26 11:45:39,836 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 90 selfloop transitions, 20 changer transitions 12/128 dead transitions. [2023-11-26 11:45:39,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 947 flow [2023-11-26 11:45:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:45:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2023-11-26 11:45:39,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373522458628842 [2023-11-26 11:45:39,839 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 185 transitions. [2023-11-26 11:45:39,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 185 transitions. [2023-11-26 11:45:39,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:39,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 185 transitions. [2023-11-26 11:45:39,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 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) [2023-11-26 11:45:39,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:39,842 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 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) [2023-11-26 11:45:39,842 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 446 flow. Second operand 9 states and 185 transitions. [2023-11-26 11:45:39,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 947 flow [2023-11-26 11:45:39,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 872 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-11-26 11:45:39,867 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 576 flow [2023-11-26 11:45:39,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-11-26 11:45:39,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2023-11-26 11:45:39,869 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 576 flow [2023-11-26 11:45:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:39,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:39,872 INFO L208 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] [2023-11-26 11:45:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:45:39,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:39,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1858211244, now seen corresponding path program 5 times [2023-11-26 11:45:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836604071] [2023-11-26 11:45:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836604071] [2023-11-26 11:45:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836604071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:45:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788242258] [2023-11-26 11:45:41,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:45:41,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:45:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:41,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2023-11-26 11:45:41,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:41,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:41,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2023-11-26 11:45:41,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:41,867 INFO L124 PetriNetUnfolderBase]: 792/1729 cut-off events. [2023-11-26 11:45:41,868 INFO L125 PetriNetUnfolderBase]: For 3893/3893 co-relation queries the response was YES. [2023-11-26 11:45:41,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5329 conditions, 1729 events. 792/1729 cut-off events. For 3893/3893 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10654 event pairs, 168 based on Foata normal form. 0/1707 useless extension candidates. Maximal degree in co-relation 5301. Up to 759 conditions per place. [2023-11-26 11:45:41,889 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 28 changer transitions 9/135 dead transitions. [2023-11-26 11:45:41,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1065 flow [2023-11-26 11:45:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:45:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:45:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2023-11-26 11:45:41,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127659574468085 [2023-11-26 11:45:41,892 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 194 transitions. [2023-11-26 11:45:41,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 194 transitions. [2023-11-26 11:45:41,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:41,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 194 transitions. [2023-11-26 11:45:41,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.4) internal successors, (194), 10 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) [2023-11-26 11:45:41,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 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) [2023-11-26 11:45:41,895 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 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) [2023-11-26 11:45:41,895 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 576 flow. Second operand 10 states and 194 transitions. [2023-11-26 11:45:41,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1065 flow [2023-11-26 11:45:41,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 981 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:41,920 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 652 flow [2023-11-26 11:45:41,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-11-26 11:45:41,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2023-11-26 11:45:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 652 flow [2023-11-26 11:45:41,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 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) [2023-11-26 11:45:41,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:41,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:45:41,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:45:41,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1132930177, now seen corresponding path program 1 times [2023-11-26 11:45:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093359287] [2023-11-26 11:45:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:41,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:43,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:43,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093359287] [2023-11-26 11:45:43,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093359287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:43,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807679106] [2023-11-26 11:45:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:43,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:43,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:43,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:43,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b095c1fa-eafb-44fc-8ca3-638805d76fc5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:43,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 11:45:43,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:43,987 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 16 treesize of output 15 [2023-11-26 11:45:44,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 131 [2023-11-26 11:45:44,190 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 11 treesize of output 7 [2023-11-26 11:45:44,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-11-26 11:45:44,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 106 treesize of output 85 [2023-11-26 11:45:46,000 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 60 treesize of output 48 [2023-11-26 11:45:46,005 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 58 treesize of output 48 [2023-11-26 11:45:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:46,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:46,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:45:46,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-26 11:45:46,803 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-26 11:45:46,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-26 11:45:57,791 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-26 11:45:57,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-26 11:45:57,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:45:57,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2023-11-26 11:46:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:03,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807679106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:03,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:03,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-26 11:46:03,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885049715] [2023-11-26 11:46:03,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:03,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 11:46:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 11:46:03,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=712, Unknown=2, NotChecked=0, Total=870 [2023-11-26 11:46:07,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]